/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:54:49,671 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:54:49,732 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 11:54:49,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:54:49,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:54:49,776 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:54:49,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:54:49,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:54:49,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:54:49,780 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:54:49,781 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:54:49,781 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:54:49,781 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:54:49,782 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:54:49,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:54:49,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:54:49,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:54:49,783 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:54:49,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:54:49,783 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:54:49,783 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:54:49,784 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:54:49,784 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:54:49,784 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:54:49,785 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:54:49,785 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:54:49,785 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:54:49,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:54:49,786 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:54:49,786 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:54:49,786 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:54:49,786 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:54:49,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:54:49,787 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:54:49,787 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:54:49,787 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:54:50,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:54:50,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:54:50,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:54:50,107 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:54:50,107 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:54:50,108 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-26 11:54:51,334 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:54:51,556 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:54:51,556 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-26 11:54:51,572 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8da20bc/2772ba02f7804fdba18a591362e3f9cf/FLAG180b61acc [2023-08-26 11:54:51,588 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8da20bc/2772ba02f7804fdba18a591362e3f9cf [2023-08-26 11:54:51,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:54:51,595 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:54:51,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:54:51,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:54:51,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:54:51,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:54:51" (1/1) ... [2023-08-26 11:54:51,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b3084c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:51, skipping insertion in model container [2023-08-26 11:54:51,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:54:51" (1/1) ... [2023-08-26 11:54:51,648 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:54:51,819 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:54:51,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:54:51,969 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:54:51,989 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:54:51,999 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [266] [2023-08-26 11:54:52,001 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [266] [2023-08-26 11:54:52,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:54:52,057 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:54:52,057 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:54:52,057 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:54:52,063 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:54:52,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52 WrapperNode [2023-08-26 11:54:52,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:54:52,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:54:52,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:54:52,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:54:52,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,121 INFO L138 Inliner]: procedures = 171, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2023-08-26 11:54:52,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:54:52,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:54:52,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:54:52,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:54:52,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,155 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:54:52,155 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:54:52,155 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:54:52,156 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:54:52,156 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (1/1) ... [2023-08-26 11:54:52,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:54:52,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:54:52,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 11:54:52,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 11:54:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:54:52,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:54:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:54:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:54:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:54:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:54:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:54:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:54:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:54:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:54:52,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:54:52,241 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:54:52,340 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:54:52,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:54:52,437 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:54:52,456 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:54:52,456 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 11:54:52,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:54:52 BoogieIcfgContainer [2023-08-26 11:54:52,458 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:54:52,460 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:54:52,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:54:52,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:54:52,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:54:51" (1/3) ... [2023-08-26 11:54:52,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8a4742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:54:52, skipping insertion in model container [2023-08-26 11:54:52,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:54:52" (2/3) ... [2023-08-26 11:54:52,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8a4742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:54:52, skipping insertion in model container [2023-08-26 11:54:52,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:54:52" (3/3) ... [2023-08-26 11:54:52,466 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2023-08-26 11:54:52,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:54:52,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-26 11:54:52,482 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:54:52,517 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:54:52,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 89 flow [2023-08-26 11:54:52,572 INFO L124 PetriNetUnfolderBase]: 2/54 cut-off events. [2023-08-26 11:54:52,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:54:52,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2023-08-26 11:54:52,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 42 transitions, 89 flow [2023-08-26 11:54:52,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 89 flow [2023-08-26 11:54:52,581 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:54:52,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 42 transitions, 89 flow [2023-08-26 11:54:52,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 42 transitions, 89 flow [2023-08-26 11:54:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 89 flow [2023-08-26 11:54:52,604 INFO L124 PetriNetUnfolderBase]: 2/54 cut-off events. [2023-08-26 11:54:52,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:54:52,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2023-08-26 11:54:52,605 INFO L119 LiptonReduction]: Number of co-enabled transitions 330 [2023-08-26 11:54:53,766 INFO L134 LiptonReduction]: Checked pairs total: 305 [2023-08-26 11:54:53,766 INFO L136 LiptonReduction]: Total number of compositions: 41 [2023-08-26 11:54:53,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:54:53,784 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;@646cb724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:54:53,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 11:54:53,787 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:54:53,787 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:54:53,787 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:54:53,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:53,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:54:53,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 11:54:53,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 6423, now seen corresponding path program 1 times [2023-08-26 11:54:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:53,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712340850] [2023-08-26 11:54:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:53,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712340850] [2023-08-26 11:54:54,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712340850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:54,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:54,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765996285] [2023-08-26 11:54:54,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:54,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 83 [2023-08-26 11:54:54,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:54,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 83 [2023-08-26 11:54:54,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:54,108 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-26 11:54:54,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:54:54,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 3 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2023-08-26 11:54:54,110 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-08-26 11:54:54,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2023-08-26 11:54:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-08-26 11:54:54,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37349397590361444 [2023-08-26 11:54:54,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-08-26 11:54:54,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-08-26 11:54:54,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:54,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-08-26 11:54:54,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,132 INFO L175 Difference]: Start difference. First operand has 13 places, 10 transitions, 25 flow. Second operand 3 states and 93 transitions. [2023-08-26 11:54:54,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2023-08-26 11:54:54,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:54:54,135 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 21 flow [2023-08-26 11:54:54,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2023-08-26 11:54:54,140 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, -1 predicate places. [2023-08-26 11:54:54,140 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 21 flow [2023-08-26 11:54:54,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:54,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:54:54,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:54:54,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 11:54:54,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:54,142 INFO L85 PathProgramCache]: Analyzing trace with hash 6422, now seen corresponding path program 1 times [2023-08-26 11:54:54,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:54,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618949500] [2023-08-26 11:54:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:54,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:54,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618949500] [2023-08-26 11:54:54,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618949500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:54,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:54,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872015726] [2023-08-26 11:54:54,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:54,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:54,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:54,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:54,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 83 [2023-08-26 11:54:54,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:54,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 83 [2023-08-26 11:54:54,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:54,201 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-26 11:54:54,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:54:54,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 24. Up to 10 conditions per place. [2023-08-26 11:54:54,202 INFO L140 encePairwiseOnDemand]: 81/83 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-26 11:54:54,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 29 flow [2023-08-26 11:54:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-08-26 11:54:54,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3493975903614458 [2023-08-26 11:54:54,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-08-26 11:54:54,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-08-26 11:54:54,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:54,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-08-26 11:54:54,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,207 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 21 flow. Second operand 3 states and 87 transitions. [2023-08-26 11:54:54,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 29 flow [2023-08-26 11:54:54,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:54,208 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2023-08-26 11:54:54,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-26 11:54:54,209 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, -1 predicate places. [2023-08-26 11:54:54,209 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2023-08-26 11:54:54,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:54,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 11:54:54,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:54:54,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 11:54:54,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:54,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1639012875, now seen corresponding path program 1 times [2023-08-26 11:54:54,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:54,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777290883] [2023-08-26 11:54:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:54,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:54:54,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:54:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:54:54,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:54:54,248 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:54:54,249 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-26 11:54:54,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-26 11:54:54,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-08-26 11:54:54,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-08-26 11:54:54,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-26 11:54:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:54:54,252 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 11:54:54,255 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:54:54,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:54:54,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:54:54,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 54 transitions, 120 flow [2023-08-26 11:54:54,282 INFO L124 PetriNetUnfolderBase]: 3/80 cut-off events. [2023-08-26 11:54:54,282 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:54:54,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 80 events. 3/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-26 11:54:54,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 54 transitions, 120 flow [2023-08-26 11:54:54,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 54 transitions, 120 flow [2023-08-26 11:54:54,284 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:54:54,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 54 transitions, 120 flow [2023-08-26 11:54:54,284 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 54 transitions, 120 flow [2023-08-26 11:54:54,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 54 transitions, 120 flow [2023-08-26 11:54:54,296 INFO L124 PetriNetUnfolderBase]: 3/80 cut-off events. [2023-08-26 11:54:54,296 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:54:54,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 80 events. 3/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-26 11:54:54,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 924 [2023-08-26 11:54:55,483 INFO L134 LiptonReduction]: Checked pairs total: 1089 [2023-08-26 11:54:55,484 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-26 11:54:55,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:54:55,487 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;@646cb724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:54:55,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 11:54:55,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:54:55,488 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:54:55,488 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:54:55,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:55,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:54:55,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:54:55,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash 9944, now seen corresponding path program 1 times [2023-08-26 11:54:55,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:55,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711249277] [2023-08-26 11:54:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:55,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711249277] [2023-08-26 11:54:55,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711249277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:55,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:55,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905423791] [2023-08-26 11:54:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:55,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:55,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2023-08-26 11:54:55,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:55,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2023-08-26 11:54:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:55,623 INFO L124 PetriNetUnfolderBase]: 66/143 cut-off events. [2023-08-26 11:54:55,624 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 11:54:55,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 143 events. 66/143 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 619 event pairs, 66 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 84. Up to 129 conditions per place. [2023-08-26 11:54:55,626 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 10 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-08-26 11:54:55,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 62 flow [2023-08-26 11:54:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-08-26 11:54:55,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41580756013745707 [2023-08-26 11:54:55,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-08-26 11:54:55,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-08-26 11:54:55,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:55,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-08-26 11:54:55,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,636 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 121 transitions. [2023-08-26 11:54:55,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 62 flow [2023-08-26 11:54:55,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 14 transitions, 60 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:54:55,637 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 40 flow [2023-08-26 11:54:55,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2023-08-26 11:54:55,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2023-08-26 11:54:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 40 flow [2023-08-26 11:54:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:55,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:54:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:54:55,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:54:55,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 9943, now seen corresponding path program 1 times [2023-08-26 11:54:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456422672] [2023-08-26 11:54:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:55,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:55,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456422672] [2023-08-26 11:54:55,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456422672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:55,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:55,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:55,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703688196] [2023-08-26 11:54:55,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:55,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:55,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:55,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:55,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 97 [2023-08-26 11:54:55,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:55,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 97 [2023-08-26 11:54:55,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:55,755 INFO L124 PetriNetUnfolderBase]: 39/95 cut-off events. [2023-08-26 11:54:55,755 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 11:54:55,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 95 events. 39/95 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 349 event pairs, 39 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 192. Up to 81 conditions per place. [2023-08-26 11:54:55,756 INFO L140 encePairwiseOnDemand]: 95/97 looper letters, 9 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 11:54:55,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 13 transitions, 58 flow [2023-08-26 11:54:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-08-26 11:54:55,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41924398625429554 [2023-08-26 11:54:55,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-08-26 11:54:55,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-08-26 11:54:55,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:55,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-08-26 11:54:55,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,760 INFO L175 Difference]: Start difference. First operand has 21 places, 14 transitions, 40 flow. Second operand 3 states and 122 transitions. [2023-08-26 11:54:55,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 13 transitions, 58 flow [2023-08-26 11:54:55,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 13 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:55,761 INFO L231 Difference]: Finished difference. Result has 21 places, 13 transitions, 39 flow [2023-08-26 11:54:55,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=21, PETRI_TRANSITIONS=13} [2023-08-26 11:54:55,762 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2023-08-26 11:54:55,762 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 13 transitions, 39 flow [2023-08-26 11:54:55,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:55,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:54:55,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:54:55,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:54:55,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash 296508071, now seen corresponding path program 1 times [2023-08-26 11:54:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:55,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914172527] [2023-08-26 11:54:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:55,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:55,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914172527] [2023-08-26 11:54:55,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914172527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:55,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:55,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:54:55,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601891416] [2023-08-26 11:54:55,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:55,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:55,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:55,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:55,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2023-08-26 11:54:55,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 13 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:55,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2023-08-26 11:54:55,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:55,821 INFO L124 PetriNetUnfolderBase]: 42/97 cut-off events. [2023-08-26 11:54:55,821 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:54:55,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 97 events. 42/97 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 404 event pairs, 16 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 199. Up to 47 conditions per place. [2023-08-26 11:54:55,822 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 13 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-08-26 11:54:55,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 88 flow [2023-08-26 11:54:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-08-26 11:54:55,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47079037800687284 [2023-08-26 11:54:55,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-08-26 11:54:55,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-08-26 11:54:55,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:55,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-08-26 11:54:55,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,826 INFO L175 Difference]: Start difference. First operand has 21 places, 13 transitions, 39 flow. Second operand 3 states and 137 transitions. [2023-08-26 11:54:55,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 88 flow [2023-08-26 11:54:55,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:55,827 INFO L231 Difference]: Finished difference. Result has 24 places, 15 transitions, 60 flow [2023-08-26 11:54:55,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=24, PETRI_TRANSITIONS=15} [2023-08-26 11:54:55,828 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-08-26 11:54:55,828 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 15 transitions, 60 flow [2023-08-26 11:54:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:55,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:55,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:54:55,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:54:55,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash -415391861, now seen corresponding path program 1 times [2023-08-26 11:54:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:55,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288682439] [2023-08-26 11:54:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:55,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:54:55,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288682439] [2023-08-26 11:54:55,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288682439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:55,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:55,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:54:55,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483358809] [2023-08-26 11:54:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:55,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:55,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:55,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2023-08-26 11:54:55,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:55,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2023-08-26 11:54:55,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:55,894 INFO L124 PetriNetUnfolderBase]: 33/92 cut-off events. [2023-08-26 11:54:55,894 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 11:54:55,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 92 events. 33/92 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 395 event pairs, 18 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 235. Up to 41 conditions per place. [2023-08-26 11:54:55,895 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 12 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2023-08-26 11:54:55,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 106 flow [2023-08-26 11:54:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-08-26 11:54:55,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639175257731959 [2023-08-26 11:54:55,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-08-26 11:54:55,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-08-26 11:54:55,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:55,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-08-26 11:54:55,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,902 INFO L175 Difference]: Start difference. First operand has 24 places, 15 transitions, 60 flow. Second operand 3 states and 135 transitions. [2023-08-26 11:54:55,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 106 flow [2023-08-26 11:54:55,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 98 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:54:55,904 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 82 flow [2023-08-26 11:54:55,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2023-08-26 11:54:55,906 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-26 11:54:55,906 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 82 flow [2023-08-26 11:54:55,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:55,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:55,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:54:55,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:54:55,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash 8877745, now seen corresponding path program 1 times [2023-08-26 11:54:55,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:55,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217727596] [2023-08-26 11:54:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:55,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:54:55,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:55,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217727596] [2023-08-26 11:54:55,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217727596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:55,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:55,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:54:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424610885] [2023-08-26 11:54:55,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:54:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:54:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:54:55,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2023-08-26 11:54:55,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:55,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:55,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2023-08-26 11:54:55,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:56,034 INFO L124 PetriNetUnfolderBase]: 29/78 cut-off events. [2023-08-26 11:54:56,034 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 11:54:56,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 78 events. 29/78 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 308 event pairs, 6 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 235. Up to 61 conditions per place. [2023-08-26 11:54:56,035 INFO L140 encePairwiseOnDemand]: 95/97 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 11:54:56,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 123 flow [2023-08-26 11:54:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2023-08-26 11:54:56,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048109965635736 [2023-08-26 11:54:56,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2023-08-26 11:54:56,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2023-08-26 11:54:56,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:56,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2023-08-26 11:54:56,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,041 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 82 flow. Second operand 3 states and 134 transitions. [2023-08-26 11:54:56,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 123 flow [2023-08-26 11:54:56,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 115 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:54:56,044 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 74 flow [2023-08-26 11:54:56,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-26 11:54:56,045 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-08-26 11:54:56,045 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 74 flow [2023-08-26 11:54:56,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:56,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:56,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:54:56,046 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:54:56,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash 7756154, now seen corresponding path program 1 times [2023-08-26 11:54:56,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:56,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821478413] [2023-08-26 11:54:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:54:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821478413] [2023-08-26 11:54:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821478413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:56,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:56,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:54:56,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398370433] [2023-08-26 11:54:56,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:56,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:54:56,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:56,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:54:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:54:56,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 97 [2023-08-26 11:54:56,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:56,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 97 [2023-08-26 11:54:56,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:56,142 INFO L124 PetriNetUnfolderBase]: 25/76 cut-off events. [2023-08-26 11:54:56,142 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-26 11:54:56,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 76 events. 25/76 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 301 event pairs, 8 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 215. Up to 45 conditions per place. [2023-08-26 11:54:56,143 INFO L140 encePairwiseOnDemand]: 95/97 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-08-26 11:54:56,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 17 transitions, 104 flow [2023-08-26 11:54:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2023-08-26 11:54:56,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536082474226804 [2023-08-26 11:54:56,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 132 transitions. [2023-08-26 11:54:56,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 132 transitions. [2023-08-26 11:54:56,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:56,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 132 transitions. [2023-08-26 11:54:56,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,146 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 74 flow. Second operand 3 states and 132 transitions. [2023-08-26 11:54:56,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 17 transitions, 104 flow [2023-08-26 11:54:56,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:56,148 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 72 flow [2023-08-26 11:54:56,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2023-08-26 11:54:56,150 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-08-26 11:54:56,150 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 72 flow [2023-08-26 11:54:56,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:56,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:56,151 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 11:54:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:54:56,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:54:56,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash 238313046, now seen corresponding path program 1 times [2023-08-26 11:54:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:56,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676486332] [2023-08-26 11:54:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:56,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:54:56,167 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:54:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:54:56,189 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:54:56,189 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:54:56,189 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-26 11:54:56,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-26 11:54:56,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-26 11:54:56,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-26 11:54:56,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-26 11:54:56,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-26 11:54:56,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:54:56,190 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:56,191 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:54:56,191 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:54:56,214 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:54:56,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 66 transitions, 153 flow [2023-08-26 11:54:56,237 INFO L124 PetriNetUnfolderBase]: 4/106 cut-off events. [2023-08-26 11:54:56,237 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:54:56,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 106 events. 4/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 84. Up to 8 conditions per place. [2023-08-26 11:54:56,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 66 transitions, 153 flow [2023-08-26 11:54:56,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 66 transitions, 153 flow [2023-08-26 11:54:56,242 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:54:56,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 66 transitions, 153 flow [2023-08-26 11:54:56,242 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 66 transitions, 153 flow [2023-08-26 11:54:56,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 66 transitions, 153 flow [2023-08-26 11:54:56,259 INFO L124 PetriNetUnfolderBase]: 4/106 cut-off events. [2023-08-26 11:54:56,260 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:54:56,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 106 events. 4/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 84. Up to 8 conditions per place. [2023-08-26 11:54:56,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 1782 [2023-08-26 11:54:57,639 INFO L134 LiptonReduction]: Checked pairs total: 2669 [2023-08-26 11:54:57,639 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-26 11:54:57,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:54:57,641 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;@646cb724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:54:57,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 11:54:57,643 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:54:57,643 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:54:57,643 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:54:57,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:57,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:54:57,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:57,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash 14071, now seen corresponding path program 1 times [2023-08-26 11:54:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:57,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586419370] [2023-08-26 11:54:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:57,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:57,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:57,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586419370] [2023-08-26 11:54:57,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586419370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:57,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:57,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:57,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294352462] [2023-08-26 11:54:57,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:57,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:57,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:57,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 117 [2023-08-26 11:54:57,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:57,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 117 [2023-08-26 11:54:57,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:57,757 INFO L124 PetriNetUnfolderBase]: 450/763 cut-off events. [2023-08-26 11:54:57,757 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2023-08-26 11:54:57,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 763 events. 450/763 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3869 event pairs, 450 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 303. Up to 705 conditions per place. [2023-08-26 11:54:57,763 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-26 11:54:57,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 18 transitions, 87 flow [2023-08-26 11:54:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-08-26 11:54:57,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415954415954416 [2023-08-26 11:54:57,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-08-26 11:54:57,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-08-26 11:54:57,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:57,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-08-26 11:54:57,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,766 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 61 flow. Second operand 3 states and 155 transitions. [2023-08-26 11:54:57,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 18 transitions, 87 flow [2023-08-26 11:54:57,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 18 transitions, 81 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 11:54:57,768 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 53 flow [2023-08-26 11:54:57,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-08-26 11:54:57,769 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-26 11:54:57,769 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 53 flow [2023-08-26 11:54:57,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:57,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:54:57,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:54:57,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:57,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash 14069, now seen corresponding path program 1 times [2023-08-26 11:54:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:57,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480054640] [2023-08-26 11:54:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:57,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:57,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480054640] [2023-08-26 11:54:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480054640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:57,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:57,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:57,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695390880] [2023-08-26 11:54:57,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:57,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2023-08-26 11:54:57,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:57,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2023-08-26 11:54:57,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:57,853 INFO L124 PetriNetUnfolderBase]: 279/507 cut-off events. [2023-08-26 11:54:57,853 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 11:54:57,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 507 events. 279/507 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2438 event pairs, 279 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 1032. Up to 449 conditions per place. [2023-08-26 11:54:57,857 INFO L140 encePairwiseOnDemand]: 115/117 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 11:54:57,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 79 flow [2023-08-26 11:54:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-08-26 11:54:57,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2023-08-26 11:54:57,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-08-26 11:54:57,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-08-26 11:54:57,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:57,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-08-26 11:54:57,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,861 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 53 flow. Second operand 3 states and 150 transitions. [2023-08-26 11:54:57,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 79 flow [2023-08-26 11:54:57,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:57,862 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 52 flow [2023-08-26 11:54:57,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-26 11:54:57,862 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-26 11:54:57,862 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 52 flow [2023-08-26 11:54:57,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:57,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:54:57,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:54:57,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:57,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash 419515405, now seen corresponding path program 1 times [2023-08-26 11:54:57,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:57,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788207550] [2023-08-26 11:54:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:57,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:57,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788207550] [2023-08-26 11:54:57,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788207550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:57,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:57,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:54:57,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20739761] [2023-08-26 11:54:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:57,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:57,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:57,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2023-08-26 11:54:57,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:57,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2023-08-26 11:54:57,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:57,974 INFO L124 PetriNetUnfolderBase]: 370/649 cut-off events. [2023-08-26 11:54:57,974 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-26 11:54:57,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350 conditions, 649 events. 370/649 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3527 event pairs, 180 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 1340. Up to 363 conditions per place. [2023-08-26 11:54:57,979 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-26 11:54:57,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 130 flow [2023-08-26 11:54:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-08-26 11:54:57,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-26 11:54:57,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-08-26 11:54:57,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-08-26 11:54:57,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:57,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-08-26 11:54:57,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,983 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 52 flow. Second operand 3 states and 169 transitions. [2023-08-26 11:54:57,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 130 flow [2023-08-26 11:54:57,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:57,984 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 81 flow [2023-08-26 11:54:57,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 11:54:57,985 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-26 11:54:57,985 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 81 flow [2023-08-26 11:54:57,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:57,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:57,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:57,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:54:57,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:57,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1253360101, now seen corresponding path program 1 times [2023-08-26 11:54:57,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:57,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539033481] [2023-08-26 11:54:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:57,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:54:58,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:58,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539033481] [2023-08-26 11:54:58,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539033481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:58,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:58,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:54:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802721636] [2023-08-26 11:54:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:58,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2023-08-26 11:54:58,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:58,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2023-08-26 11:54:58,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:58,090 INFO L124 PetriNetUnfolderBase]: 432/765 cut-off events. [2023-08-26 11:54:58,091 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2023-08-26 11:54:58,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 765 events. 432/765 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 4436 event pairs, 182 based on Foata normal form. 0/645 useless extension candidates. Maximal degree in co-relation 1987. Up to 429 conditions per place. [2023-08-26 11:54:58,097 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-26 11:54:58,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 182 flow [2023-08-26 11:54:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-08-26 11:54:58,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2023-08-26 11:54:58,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-08-26 11:54:58,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-08-26 11:54:58,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:58,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-08-26 11:54:58,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,100 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 81 flow. Second operand 3 states and 168 transitions. [2023-08-26 11:54:58,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 182 flow [2023-08-26 11:54:58,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:54:58,102 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 121 flow [2023-08-26 11:54:58,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 11:54:58,103 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-26 11:54:58,103 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 121 flow [2023-08-26 11:54:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:58,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:58,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:54:58,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:58,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash 200873113, now seen corresponding path program 1 times [2023-08-26 11:54:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656421835] [2023-08-26 11:54:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:54:58,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:58,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656421835] [2023-08-26 11:54:58,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656421835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:58,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:58,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:54:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911687602] [2023-08-26 11:54:58,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:58,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:54:58,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:54:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:54:58,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2023-08-26 11:54:58,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:58,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2023-08-26 11:54:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:58,291 INFO L124 PetriNetUnfolderBase]: 352/619 cut-off events. [2023-08-26 11:54:58,291 INFO L125 PetriNetUnfolderBase]: For 556/556 co-relation queries the response was YES. [2023-08-26 11:54:58,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 619 events. 352/619 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3529 event pairs, 64 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 1877. Up to 512 conditions per place. [2023-08-26 11:54:58,296 INFO L140 encePairwiseOnDemand]: 115/117 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-26 11:54:58,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 227 flow [2023-08-26 11:54:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-08-26 11:54:58,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757834757834758 [2023-08-26 11:54:58,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-08-26 11:54:58,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-08-26 11:54:58,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:58,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-08-26 11:54:58,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,299 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 121 flow. Second operand 3 states and 167 transitions. [2023-08-26 11:54:58,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 227 flow [2023-08-26 11:54:58,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:54:58,301 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 109 flow [2023-08-26 11:54:58,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2023-08-26 11:54:58,302 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2023-08-26 11:54:58,302 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 109 flow [2023-08-26 11:54:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:58,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:58,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:54:58,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:58,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash 199459524, now seen corresponding path program 1 times [2023-08-26 11:54:58,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:58,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020507309] [2023-08-26 11:54:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:58,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:54:58,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020507309] [2023-08-26 11:54:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020507309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:58,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:58,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:54:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408085383] [2023-08-26 11:54:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:58,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:54:58,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:54:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:54:58,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2023-08-26 11:54:58,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:58,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2023-08-26 11:54:58,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:58,399 INFO L124 PetriNetUnfolderBase]: 285/518 cut-off events. [2023-08-26 11:54:58,399 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2023-08-26 11:54:58,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 518 events. 285/518 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2889 event pairs, 51 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 1517. Up to 412 conditions per place. [2023-08-26 11:54:58,403 INFO L140 encePairwiseOnDemand]: 115/117 looper letters, 25 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-26 11:54:58,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 194 flow [2023-08-26 11:54:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-08-26 11:54:58,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2023-08-26 11:54:58,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-08-26 11:54:58,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-08-26 11:54:58,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:58,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-08-26 11:54:58,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,406 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 109 flow. Second operand 3 states and 164 transitions. [2023-08-26 11:54:58,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 194 flow [2023-08-26 11:54:58,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:58,407 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 107 flow [2023-08-26 11:54:58,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 11:54:58,408 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2023-08-26 11:54:58,408 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 107 flow [2023-08-26 11:54:58,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:58,408 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:58,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:54:58,408 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:58,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -391944774, now seen corresponding path program 1 times [2023-08-26 11:54:58,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:58,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600979656] [2023-08-26 11:54:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:58,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:54:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:58,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600979656] [2023-08-26 11:54:58,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600979656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:58,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:58,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:54:58,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611175727] [2023-08-26 11:54:58,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:58,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:58,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:58,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2023-08-26 11:54:58,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:58,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2023-08-26 11:54:58,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:58,497 INFO L124 PetriNetUnfolderBase]: 284/582 cut-off events. [2023-08-26 11:54:58,497 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2023-08-26 11:54:58,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 582 events. 284/582 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3529 event pairs, 140 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 1677. Up to 341 conditions per place. [2023-08-26 11:54:58,501 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 20 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2023-08-26 11:54:58,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 215 flow [2023-08-26 11:54:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-08-26 11:54:58,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46438746438746437 [2023-08-26 11:54:58,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-08-26 11:54:58,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-08-26 11:54:58,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:58,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-08-26 11:54:58,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,504 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 107 flow. Second operand 3 states and 163 transitions. [2023-08-26 11:54:58,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 215 flow [2023-08-26 11:54:58,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:58,505 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 183 flow [2023-08-26 11:54:58,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-26 11:54:58,506 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-08-26 11:54:58,506 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 183 flow [2023-08-26 11:54:58,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:58,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:58,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:54:58,507 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:58,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash 734616611, now seen corresponding path program 1 times [2023-08-26 11:54:58,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:58,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607637191] [2023-08-26 11:54:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:58,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:54:58,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:58,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607637191] [2023-08-26 11:54:58,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607637191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:58,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:58,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:54:58,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803945150] [2023-08-26 11:54:58,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:58,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:54:58,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:54:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:54:58,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2023-08-26 11:54:58,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:58,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2023-08-26 11:54:58,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:58,633 INFO L124 PetriNetUnfolderBase]: 237/505 cut-off events. [2023-08-26 11:54:58,633 INFO L125 PetriNetUnfolderBase]: For 763/763 co-relation queries the response was YES. [2023-08-26 11:54:58,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1758 conditions, 505 events. 237/505 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3016 event pairs, 79 based on Foata normal form. 30/531 useless extension candidates. Maximal degree in co-relation 1745. Up to 316 conditions per place. [2023-08-26 11:54:58,637 INFO L140 encePairwiseOnDemand]: 115/117 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-26 11:54:58,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 275 flow [2023-08-26 11:54:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-08-26 11:54:58,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586894586894587 [2023-08-26 11:54:58,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-08-26 11:54:58,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-08-26 11:54:58,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:58,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-08-26 11:54:58,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,640 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 183 flow. Second operand 3 states and 161 transitions. [2023-08-26 11:54:58,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 275 flow [2023-08-26 11:54:58,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:54:58,642 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 169 flow [2023-08-26 11:54:58,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-26 11:54:58,643 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-08-26 11:54:58,643 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 169 flow [2023-08-26 11:54:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:58,644 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 11:54:58,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 11:54:58,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:54:58,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1295565170, now seen corresponding path program 1 times [2023-08-26 11:54:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:58,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675266486] [2023-08-26 11:54:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:58,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:54:58,653 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:54:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:54:58,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:54:58,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:54:58,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 11:54:58,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2023-08-26 11:54:58,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 11:54:58,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 11:54:58,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 11:54:58,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 11:54:58,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 11:54:58,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 11:54:58,662 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:58,663 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:54:58,663 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 11:54:58,678 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:54:58,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 78 transitions, 188 flow [2023-08-26 11:54:58,688 INFO L124 PetriNetUnfolderBase]: 5/132 cut-off events. [2023-08-26 11:54:58,689 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:54:58,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 132 events. 5/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 256 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 114. Up to 10 conditions per place. [2023-08-26 11:54:58,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 78 transitions, 188 flow [2023-08-26 11:54:58,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 78 transitions, 188 flow [2023-08-26 11:54:58,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:54:58,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 78 transitions, 188 flow [2023-08-26 11:54:58,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 78 transitions, 188 flow [2023-08-26 11:54:58,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 78 transitions, 188 flow [2023-08-26 11:54:58,699 INFO L124 PetriNetUnfolderBase]: 5/132 cut-off events. [2023-08-26 11:54:58,699 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:54:58,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 132 events. 5/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 256 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 114. Up to 10 conditions per place. [2023-08-26 11:54:58,701 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2023-08-26 11:55:00,066 INFO L134 LiptonReduction]: Checked pairs total: 4751 [2023-08-26 11:55:00,066 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-26 11:55:00,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:55:00,068 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;@646cb724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:55:00,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-26 11:55:00,069 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:55:00,069 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:55:00,069 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:00,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:00,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:00,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:00,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 18837, now seen corresponding path program 1 times [2023-08-26 11:55:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:00,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418963862] [2023-08-26 11:55:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:00,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418963862] [2023-08-26 11:55:00,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418963862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:00,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:00,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:00,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732672983] [2023-08-26 11:55:00,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:00,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:00,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:00,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-26 11:55:00,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:00,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-26 11:55:00,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:00,373 INFO L124 PetriNetUnfolderBase]: 2562/3819 cut-off events. [2023-08-26 11:55:00,373 INFO L125 PetriNetUnfolderBase]: For 1054/1054 co-relation queries the response was YES. [2023-08-26 11:55:00,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8064 conditions, 3819 events. 2562/3819 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 21462 event pairs, 2562 based on Foata normal form. 0/2452 useless extension candidates. Maximal degree in co-relation 1631. Up to 3585 conditions per place. [2023-08-26 11:55:00,405 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 11:55:00,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 114 flow [2023-08-26 11:55:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-08-26 11:55:00,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45255474452554745 [2023-08-26 11:55:00,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-08-26 11:55:00,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-08-26 11:55:00,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:00,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-08-26 11:55:00,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,409 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 80 flow. Second operand 3 states and 186 transitions. [2023-08-26 11:55:00,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 114 flow [2023-08-26 11:55:00,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 22 transitions, 102 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-26 11:55:00,411 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 66 flow [2023-08-26 11:55:00,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-26 11:55:00,412 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-26 11:55:00,412 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 66 flow [2023-08-26 11:55:00,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:00,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:00,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:55:00,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:00,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 18836, now seen corresponding path program 1 times [2023-08-26 11:55:00,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:00,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145021199] [2023-08-26 11:55:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:00,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:00,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145021199] [2023-08-26 11:55:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145021199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:00,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:00,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:00,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204610438] [2023-08-26 11:55:00,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:00,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:00,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:00,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 137 [2023-08-26 11:55:00,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:00,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 137 [2023-08-26 11:55:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:00,630 INFO L124 PetriNetUnfolderBase]: 1623/2539 cut-off events. [2023-08-26 11:55:00,630 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-26 11:55:00,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5170 conditions, 2539 events. 1623/2539 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 13726 event pairs, 1623 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 5160. Up to 2305 conditions per place. [2023-08-26 11:55:00,648 INFO L140 encePairwiseOnDemand]: 135/137 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-26 11:55:00,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 21 transitions, 100 flow [2023-08-26 11:55:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-08-26 11:55:00,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44038929440389296 [2023-08-26 11:55:00,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-08-26 11:55:00,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-08-26 11:55:00,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:00,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-08-26 11:55:00,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,652 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 66 flow. Second operand 3 states and 181 transitions. [2023-08-26 11:55:00,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 21 transitions, 100 flow [2023-08-26 11:55:00,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:00,652 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 65 flow [2023-08-26 11:55:00,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2023-08-26 11:55:00,653 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-26 11:55:00,653 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 65 flow [2023-08-26 11:55:00,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:00,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:00,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 11:55:00,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:00,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash 561608757, now seen corresponding path program 1 times [2023-08-26 11:55:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:00,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700734028] [2023-08-26 11:55:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:00,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:00,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700734028] [2023-08-26 11:55:00,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700734028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:00,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:00,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:00,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559669475] [2023-08-26 11:55:00,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:00,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:00,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:00,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:00,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:00,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:00,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:00,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:00,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:00,917 INFO L124 PetriNetUnfolderBase]: 2300/3511 cut-off events. [2023-08-26 11:55:00,918 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2023-08-26 11:55:00,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7232 conditions, 3511 events. 2300/3511 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 20777 event pairs, 1224 based on Foata normal form. 0/2580 useless extension candidates. Maximal degree in co-relation 7221. Up to 2129 conditions per place. [2023-08-26 11:55:00,945 INFO L140 encePairwiseOnDemand]: 131/137 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-08-26 11:55:00,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 172 flow [2023-08-26 11:55:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-08-26 11:55:00,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48905109489051096 [2023-08-26 11:55:00,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-08-26 11:55:00,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-08-26 11:55:00,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:00,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-08-26 11:55:00,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,948 INFO L175 Difference]: Start difference. First operand has 33 places, 21 transitions, 65 flow. Second operand 3 states and 201 transitions. [2023-08-26 11:55:00,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 172 flow [2023-08-26 11:55:00,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:00,949 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 102 flow [2023-08-26 11:55:00,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-26 11:55:00,950 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-26 11:55:00,950 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 102 flow [2023-08-26 11:55:00,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:00,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 11:55:00,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:00,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1503864155, now seen corresponding path program 1 times [2023-08-26 11:55:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034216311] [2023-08-26 11:55:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:00,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034216311] [2023-08-26 11:55:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034216311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:00,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:00,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231694271] [2023-08-26 11:55:00,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:00,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:00,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:00,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:00,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:00,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:00,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:00,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:01,401 INFO L124 PetriNetUnfolderBase]: 3060/4717 cut-off events. [2023-08-26 11:55:01,401 INFO L125 PetriNetUnfolderBase]: For 2755/2755 co-relation queries the response was YES. [2023-08-26 11:55:01,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12126 conditions, 4717 events. 3060/4717 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 30000 event pairs, 1352 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 12114. Up to 2885 conditions per place. [2023-08-26 11:55:01,440 INFO L140 encePairwiseOnDemand]: 131/137 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-26 11:55:01,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 244 flow [2023-08-26 11:55:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-08-26 11:55:01,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48661800486618007 [2023-08-26 11:55:01,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-08-26 11:55:01,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-08-26 11:55:01,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:01,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-08-26 11:55:01,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,443 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 102 flow. Second operand 3 states and 200 transitions. [2023-08-26 11:55:01,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 244 flow [2023-08-26 11:55:01,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:01,458 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 160 flow [2023-08-26 11:55:01,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-26 11:55:01,458 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-26 11:55:01,458 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 160 flow [2023-08-26 11:55:01,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:01,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:01,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 11:55:01,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:01,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash 626467404, now seen corresponding path program 1 times [2023-08-26 11:55:01,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:01,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490059659] [2023-08-26 11:55:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:01,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:55:01,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:01,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490059659] [2023-08-26 11:55:01,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490059659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:01,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:01,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150645320] [2023-08-26 11:55:01,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:01,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:01,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:01,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:01,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:01,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:01,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:01,827 INFO L124 PetriNetUnfolderBase]: 2474/3707 cut-off events. [2023-08-26 11:55:01,827 INFO L125 PetriNetUnfolderBase]: For 3413/3413 co-relation queries the response was YES. [2023-08-26 11:55:01,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11161 conditions, 3707 events. 2474/3707 cut-off events. For 3413/3413 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 22856 event pairs, 472 based on Foata normal form. 0/3135 useless extension candidates. Maximal degree in co-relation 11148. Up to 3026 conditions per place. [2023-08-26 11:55:01,849 INFO L140 encePairwiseOnDemand]: 135/137 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-26 11:55:01,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 323 flow [2023-08-26 11:55:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-08-26 11:55:01,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48418491484184917 [2023-08-26 11:55:01,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-08-26 11:55:01,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-08-26 11:55:01,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:01,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-08-26 11:55:01,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,853 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 160 flow. Second operand 3 states and 199 transitions. [2023-08-26 11:55:01,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 323 flow [2023-08-26 11:55:01,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:01,863 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 144 flow [2023-08-26 11:55:01,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-26 11:55:01,863 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-26 11:55:01,863 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 144 flow [2023-08-26 11:55:01,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:01,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:01,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 11:55:01,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:01,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 624853865, now seen corresponding path program 1 times [2023-08-26 11:55:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:01,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622308741] [2023-08-26 11:55:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622308741] [2023-08-26 11:55:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622308741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038591663] [2023-08-26 11:55:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:01,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:01,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:01,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:01,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:01,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:02,133 INFO L124 PetriNetUnfolderBase]: 1993/3029 cut-off events. [2023-08-26 11:55:02,134 INFO L125 PetriNetUnfolderBase]: For 2304/2304 co-relation queries the response was YES. [2023-08-26 11:55:02,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 3029 events. 1993/3029 cut-off events. For 2304/2304 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18128 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 8815. Up to 2450 conditions per place. [2023-08-26 11:55:02,156 INFO L140 encePairwiseOnDemand]: 135/137 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-26 11:55:02,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 284 flow [2023-08-26 11:55:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-26 11:55:02,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4768856447688564 [2023-08-26 11:55:02,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-26 11:55:02,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-26 11:55:02,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:02,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-26 11:55:02,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,159 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 144 flow. Second operand 3 states and 196 transitions. [2023-08-26 11:55:02,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 284 flow [2023-08-26 11:55:02,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:02,163 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 142 flow [2023-08-26 11:55:02,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-26 11:55:02,164 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-26 11:55:02,164 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 142 flow [2023-08-26 11:55:02,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:02,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:02,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 11:55:02,164 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:02,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1788456393, now seen corresponding path program 1 times [2023-08-26 11:55:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:02,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309074454] [2023-08-26 11:55:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:55:02,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:02,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309074454] [2023-08-26 11:55:02,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309074454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:02,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:02,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:02,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202699338] [2023-08-26 11:55:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:02,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:02,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:02,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:02,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:02,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:02,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:02,522 INFO L124 PetriNetUnfolderBase]: 2430/3913 cut-off events. [2023-08-26 11:55:02,522 INFO L125 PetriNetUnfolderBase]: For 3547/3547 co-relation queries the response was YES. [2023-08-26 11:55:02,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11285 conditions, 3913 events. 2430/3913 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 25937 event pairs, 988 based on Foata normal form. 0/3420 useless extension candidates. Maximal degree in co-relation 11272. Up to 2459 conditions per place. [2023-08-26 11:55:02,548 INFO L140 encePairwiseOnDemand]: 131/137 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2023-08-26 11:55:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 313 flow [2023-08-26 11:55:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-08-26 11:55:02,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744525547445255 [2023-08-26 11:55:02,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-08-26 11:55:02,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-08-26 11:55:02,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:02,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-08-26 11:55:02,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,551 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 142 flow. Second operand 3 states and 195 transitions. [2023-08-26 11:55:02,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 313 flow [2023-08-26 11:55:02,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:02,554 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 266 flow [2023-08-26 11:55:02,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-08-26 11:55:02,554 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-26 11:55:02,554 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 266 flow [2023-08-26 11:55:02,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:02,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:02,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 11:55:02,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:02,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -392423230, now seen corresponding path program 1 times [2023-08-26 11:55:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294707318] [2023-08-26 11:55:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:55:02,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:02,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294707318] [2023-08-26 11:55:02,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294707318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:02,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:02,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580636049] [2023-08-26 11:55:02,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:02,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:02,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:02,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:02,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:02,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:02,885 INFO L124 PetriNetUnfolderBase]: 1955/3099 cut-off events. [2023-08-26 11:55:02,885 INFO L125 PetriNetUnfolderBase]: For 5131/5131 co-relation queries the response was YES. [2023-08-26 11:55:02,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11105 conditions, 3099 events. 1955/3099 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19703 event pairs, 409 based on Foata normal form. 204/3062 useless extension candidates. Maximal degree in co-relation 11091. Up to 2442 conditions per place. [2023-08-26 11:55:02,909 INFO L140 encePairwiseOnDemand]: 135/137 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-26 11:55:02,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 449 flow [2023-08-26 11:55:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-08-26 11:55:02,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46958637469586373 [2023-08-26 11:55:02,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-08-26 11:55:02,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-08-26 11:55:02,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:02,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-08-26 11:55:02,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,912 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 266 flow. Second operand 3 states and 193 transitions. [2023-08-26 11:55:02,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 449 flow [2023-08-26 11:55:02,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:02,922 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 244 flow [2023-08-26 11:55:02,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-08-26 11:55:02,923 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-26 11:55:02,923 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 244 flow [2023-08-26 11:55:02,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:02,923 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:02,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 11:55:02,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:02,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1318562107, now seen corresponding path program 1 times [2023-08-26 11:55:02,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658590559] [2023-08-26 11:55:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 11:55:02,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:02,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658590559] [2023-08-26 11:55:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658590559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:02,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:02,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:02,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745135084] [2023-08-26 11:55:02,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:02,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:03,263 INFO L124 PetriNetUnfolderBase]: 2132/3676 cut-off events. [2023-08-26 11:55:03,263 INFO L125 PetriNetUnfolderBase]: For 5429/5429 co-relation queries the response was YES. [2023-08-26 11:55:03,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12141 conditions, 3676 events. 2132/3676 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 26105 event pairs, 890 based on Foata normal form. 0/3492 useless extension candidates. Maximal degree in co-relation 12127. Up to 2397 conditions per place. [2023-08-26 11:55:03,290 INFO L140 encePairwiseOnDemand]: 131/137 looper letters, 33 selfloop transitions, 21 changer transitions 0/57 dead transitions. [2023-08-26 11:55:03,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 492 flow [2023-08-26 11:55:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-08-26 11:55:03,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46715328467153283 [2023-08-26 11:55:03,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-08-26 11:55:03,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-08-26 11:55:03,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:03,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-08-26 11:55:03,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,293 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 244 flow. Second operand 3 states and 192 transitions. [2023-08-26 11:55:03,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 492 flow [2023-08-26 11:55:03,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 484 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:03,297 INFO L231 Difference]: Finished difference. Result has 42 places, 50 transitions, 462 flow [2023-08-26 11:55:03,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=42, PETRI_TRANSITIONS=50} [2023-08-26 11:55:03,298 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 9 predicate places. [2023-08-26 11:55:03,298 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 50 transitions, 462 flow [2023-08-26 11:55:03,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:03,298 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:03,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 11:55:03,299 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:03,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:03,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2074244476, now seen corresponding path program 1 times [2023-08-26 11:55:03,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:03,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744276777] [2023-08-26 11:55:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:03,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 11:55:03,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:03,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744276777] [2023-08-26 11:55:03,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744276777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:03,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:03,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:03,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524770152] [2023-08-26 11:55:03,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:03,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:03,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:03,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:03,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2023-08-26 11:55:03,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 50 transitions, 462 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:03,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2023-08-26 11:55:03,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:03,642 INFO L124 PetriNetUnfolderBase]: 1771/3145 cut-off events. [2023-08-26 11:55:03,643 INFO L125 PetriNetUnfolderBase]: For 7685/7685 co-relation queries the response was YES. [2023-08-26 11:55:03,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12212 conditions, 3145 events. 1771/3145 cut-off events. For 7685/7685 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 22389 event pairs, 569 based on Foata normal form. 170/3301 useless extension candidates. Maximal degree in co-relation 12197. Up to 1944 conditions per place. [2023-08-26 11:55:03,695 INFO L140 encePairwiseOnDemand]: 135/137 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-08-26 11:55:03,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 65 transitions, 707 flow [2023-08-26 11:55:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-08-26 11:55:03,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46228710462287104 [2023-08-26 11:55:03,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-08-26 11:55:03,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-08-26 11:55:03,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:03,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-08-26 11:55:03,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,699 INFO L175 Difference]: Start difference. First operand has 42 places, 50 transitions, 462 flow. Second operand 3 states and 190 transitions. [2023-08-26 11:55:03,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 65 transitions, 707 flow [2023-08-26 11:55:03,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 665 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:03,705 INFO L231 Difference]: Finished difference. Result has 41 places, 49 transitions, 432 flow [2023-08-26 11:55:03,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=41, PETRI_TRANSITIONS=49} [2023-08-26 11:55:03,706 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-26 11:55:03,706 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 49 transitions, 432 flow [2023-08-26 11:55:03,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:03,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:03,706 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:03,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 11:55:03,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:55:03,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:03,707 INFO L85 PathProgramCache]: Analyzing trace with hash 119571927, now seen corresponding path program 1 times [2023-08-26 11:55:03,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:03,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585983898] [2023-08-26 11:55:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:03,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:03,717 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:55:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:03,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:55:03,726 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:55:03,727 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-26 11:55:03,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (6 of 8 remaining) [2023-08-26 11:55:03,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-26 11:55:03,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-26 11:55:03,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 8 remaining) [2023-08-26 11:55:03,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2023-08-26 11:55:03,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2023-08-26 11:55:03,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2023-08-26 11:55:03,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 11:55:03,728 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:03,728 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:55:03,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 11:55:03,748 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:55:03,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 90 transitions, 225 flow [2023-08-26 11:55:03,764 INFO L124 PetriNetUnfolderBase]: 6/158 cut-off events. [2023-08-26 11:55:03,764 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 11:55:03,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 158 events. 6/158 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 326 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 145. Up to 12 conditions per place. [2023-08-26 11:55:03,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 90 transitions, 225 flow [2023-08-26 11:55:03,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 90 transitions, 225 flow [2023-08-26 11:55:03,766 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:55:03,766 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 90 transitions, 225 flow [2023-08-26 11:55:03,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 90 transitions, 225 flow [2023-08-26 11:55:03,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 90 transitions, 225 flow [2023-08-26 11:55:03,779 INFO L124 PetriNetUnfolderBase]: 6/158 cut-off events. [2023-08-26 11:55:03,779 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 11:55:03,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 158 events. 6/158 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 326 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 145. Up to 12 conditions per place. [2023-08-26 11:55:03,783 INFO L119 LiptonReduction]: Number of co-enabled transitions 4290 [2023-08-26 11:55:05,386 INFO L134 LiptonReduction]: Checked pairs total: 6792 [2023-08-26 11:55:05,386 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-26 11:55:05,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:55:05,388 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;@646cb724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:55:05,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 11:55:05,389 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:55:05,389 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:55:05,389 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:05,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:05,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:05,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:05,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 24244, now seen corresponding path program 1 times [2023-08-26 11:55:05,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:05,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013145097] [2023-08-26 11:55:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:05,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:05,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013145097] [2023-08-26 11:55:05,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013145097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:05,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:05,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233334929] [2023-08-26 11:55:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:05,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:05,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 157 [2023-08-26 11:55:05,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:05,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:05,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 157 [2023-08-26 11:55:05,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:06,608 INFO L124 PetriNetUnfolderBase]: 13314/18347 cut-off events. [2023-08-26 11:55:06,608 INFO L125 PetriNetUnfolderBase]: For 6750/6750 co-relation queries the response was YES. [2023-08-26 11:55:06,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38977 conditions, 18347 events. 13314/18347 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 107846 event pairs, 13314 based on Foata normal form. 0/11860 useless extension candidates. Maximal degree in co-relation 8207. Up to 17409 conditions per place. [2023-08-26 11:55:06,735 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-26 11:55:06,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 143 flow [2023-08-26 11:55:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-08-26 11:55:06,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543524416135881 [2023-08-26 11:55:06,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-08-26 11:55:06,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-08-26 11:55:06,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:06,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-08-26 11:55:06,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:06,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:06,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:06,740 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 101 flow. Second operand 3 states and 214 transitions. [2023-08-26 11:55:06,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 143 flow [2023-08-26 11:55:06,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 26 transitions, 123 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-26 11:55:06,749 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 79 flow [2023-08-26 11:55:06,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-26 11:55:06,749 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-26 11:55:06,750 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 79 flow [2023-08-26 11:55:06,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:06,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:06,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:06,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 11:55:06,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:06,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash 24243, now seen corresponding path program 1 times [2023-08-26 11:55:06,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:06,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47230510] [2023-08-26 11:55:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:06,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47230510] [2023-08-26 11:55:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47230510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:06,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:06,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974949556] [2023-08-26 11:55:06,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:06,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:06,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:06,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:06,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:06,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:07,497 INFO L124 PetriNetUnfolderBase]: 8535/12203 cut-off events. [2023-08-26 11:55:07,497 INFO L125 PetriNetUnfolderBase]: For 850/850 co-relation queries the response was YES. [2023-08-26 11:55:07,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24755 conditions, 12203 events. 8535/12203 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 71137 event pairs, 8535 based on Foata normal form. 0/8674 useless extension candidates. Maximal degree in co-relation 24744. Up to 11265 conditions per place. [2023-08-26 11:55:07,611 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 21 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-26 11:55:07,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 25 transitions, 121 flow [2023-08-26 11:55:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-08-26 11:55:07,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564755838641189 [2023-08-26 11:55:07,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-08-26 11:55:07,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-08-26 11:55:07,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:07,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-08-26 11:55:07,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:07,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:07,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:07,716 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 79 flow. Second operand 3 states and 215 transitions. [2023-08-26 11:55:07,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 25 transitions, 121 flow [2023-08-26 11:55:07,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 25 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:07,717 INFO L231 Difference]: Finished difference. Result has 39 places, 25 transitions, 78 flow [2023-08-26 11:55:07,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=25} [2023-08-26 11:55:07,724 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-26 11:55:07,724 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 25 transitions, 78 flow [2023-08-26 11:55:07,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:07,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:07,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:07,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 11:55:07,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:07,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:07,725 INFO L85 PathProgramCache]: Analyzing trace with hash 722847831, now seen corresponding path program 1 times [2023-08-26 11:55:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:07,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006654645] [2023-08-26 11:55:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:07,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:07,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006654645] [2023-08-26 11:55:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006654645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:07,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445223343] [2023-08-26 11:55:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:07,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:07,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 25 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:07,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:07,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:07,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:08,852 INFO L124 PetriNetUnfolderBase]: 12384/17359 cut-off events. [2023-08-26 11:55:08,853 INFO L125 PetriNetUnfolderBase]: For 1342/1342 co-relation queries the response was YES. [2023-08-26 11:55:08,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35566 conditions, 17359 events. 12384/17359 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 107624 event pairs, 6940 based on Foata normal form. 0/12590 useless extension candidates. Maximal degree in co-relation 35554. Up to 11057 conditions per place. [2023-08-26 11:55:08,993 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-08-26 11:55:08,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 214 flow [2023-08-26 11:55:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-26 11:55:08,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49469214437367304 [2023-08-26 11:55:08,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-26 11:55:08,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-26 11:55:08,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:08,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-26 11:55:08,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:08,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:08,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:08,996 INFO L175 Difference]: Start difference. First operand has 39 places, 25 transitions, 78 flow. Second operand 3 states and 233 transitions. [2023-08-26 11:55:08,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 214 flow [2023-08-26 11:55:08,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:08,998 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 123 flow [2023-08-26 11:55:08,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-26 11:55:09,000 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-26 11:55:09,000 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 123 flow [2023-08-26 11:55:09,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:09,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:09,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:09,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 11:55:09,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:09,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash -906417176, now seen corresponding path program 1 times [2023-08-26 11:55:09,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:09,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318647308] [2023-08-26 11:55:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:09,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:09,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:09,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318647308] [2023-08-26 11:55:09,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318647308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:09,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:09,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202589356] [2023-08-26 11:55:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:09,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:09,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:09,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:09,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:09,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:09,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:09,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:10,645 INFO L124 PetriNetUnfolderBase]: 17214/24347 cut-off events. [2023-08-26 11:55:10,645 INFO L125 PetriNetUnfolderBase]: For 13763/13763 co-relation queries the response was YES. [2023-08-26 11:55:10,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62072 conditions, 24347 events. 17214/24347 cut-off events. For 13763/13763 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 162063 event pairs, 8064 based on Foata normal form. 0/19341 useless extension candidates. Maximal degree in co-relation 62059. Up to 15695 conditions per place. [2023-08-26 11:55:10,806 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-26 11:55:10,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 306 flow [2023-08-26 11:55:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-08-26 11:55:10,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49256900212314225 [2023-08-26 11:55:10,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-08-26 11:55:10,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-08-26 11:55:10,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:10,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-08-26 11:55:10,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:10,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:10,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:10,810 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 123 flow. Second operand 3 states and 232 transitions. [2023-08-26 11:55:10,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 306 flow [2023-08-26 11:55:10,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:10,927 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 199 flow [2023-08-26 11:55:10,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-08-26 11:55:10,928 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-08-26 11:55:10,928 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 199 flow [2023-08-26 11:55:10,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:10,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:10,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:10,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 11:55:10,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:10,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1967714890, now seen corresponding path program 1 times [2023-08-26 11:55:10,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:10,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531517336] [2023-08-26 11:55:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:10,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:55:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:10,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531517336] [2023-08-26 11:55:10,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531517336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:10,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:10,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654312638] [2023-08-26 11:55:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:10,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:10,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:10,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:10,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:10,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:10,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:12,245 INFO L124 PetriNetUnfolderBase]: 13946/19127 cut-off events. [2023-08-26 11:55:12,245 INFO L125 PetriNetUnfolderBase]: For 17220/17220 co-relation queries the response was YES. [2023-08-26 11:55:12,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56977 conditions, 19127 events. 13946/19127 cut-off events. For 17220/17220 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 121055 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56963. Up to 15496 conditions per place. [2023-08-26 11:55:12,380 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-26 11:55:12,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 411 flow [2023-08-26 11:55:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-08-26 11:55:12,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49044585987261147 [2023-08-26 11:55:12,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-08-26 11:55:12,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-08-26 11:55:12,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:12,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-08-26 11:55:12,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:12,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:12,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:12,384 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 199 flow. Second operand 3 states and 231 transitions. [2023-08-26 11:55:12,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 411 flow [2023-08-26 11:55:12,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:12,465 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 179 flow [2023-08-26 11:55:12,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-26 11:55:12,465 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-26 11:55:12,465 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 179 flow [2023-08-26 11:55:12,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:12,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:12,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:12,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 11:55:12,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:12,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1965842789, now seen corresponding path program 1 times [2023-08-26 11:55:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115218437] [2023-08-26 11:55:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:12,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115218437] [2023-08-26 11:55:12,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115218437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:12,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:12,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:12,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358616988] [2023-08-26 11:55:12,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:12,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:12,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:12,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:12,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:12,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:12,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:12,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:13,582 INFO L124 PetriNetUnfolderBase]: 11269/15577 cut-off events. [2023-08-26 11:55:13,582 INFO L125 PetriNetUnfolderBase]: For 11490/11490 co-relation queries the response was YES. [2023-08-26 11:55:13,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44881 conditions, 15577 events. 11269/15577 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 96128 event pairs, 1895 based on Foata normal form. 0/12791 useless extension candidates. Maximal degree in co-relation 44867. Up to 12576 conditions per place. [2023-08-26 11:55:13,667 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-26 11:55:13,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 366 flow [2023-08-26 11:55:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-26 11:55:13,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4840764331210191 [2023-08-26 11:55:13,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-26 11:55:13,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-26 11:55:13,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:13,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-26 11:55:13,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:13,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:13,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:13,670 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 179 flow. Second operand 3 states and 228 transitions. [2023-08-26 11:55:13,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 366 flow [2023-08-26 11:55:13,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:13,673 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 177 flow [2023-08-26 11:55:13,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 11:55:13,674 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-26 11:55:13,674 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 177 flow [2023-08-26 11:55:13,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:13,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:13,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:13,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 11:55:13,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:13,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1214270373, now seen corresponding path program 1 times [2023-08-26 11:55:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:13,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471076540] [2023-08-26 11:55:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:55:13,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:13,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471076540] [2023-08-26 11:55:13,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471076540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:13,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:13,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137690561] [2023-08-26 11:55:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:13,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:13,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:13,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:13,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:13,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:13,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:13,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:15,176 INFO L124 PetriNetUnfolderBase]: 14850/21601 cut-off events. [2023-08-26 11:55:15,176 INFO L125 PetriNetUnfolderBase]: For 20184/20184 co-relation queries the response was YES. [2023-08-26 11:55:15,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61591 conditions, 21601 events. 14850/21601 cut-off events. For 20184/20184 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 149993 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 61577. Up to 14235 conditions per place. [2023-08-26 11:55:15,296 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2023-08-26 11:55:15,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 411 flow [2023-08-26 11:55:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-08-26 11:55:15,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819532908704883 [2023-08-26 11:55:15,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-08-26 11:55:15,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-08-26 11:55:15,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:15,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-08-26 11:55:15,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:15,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:15,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:15,299 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 177 flow. Second operand 3 states and 227 transitions. [2023-08-26 11:55:15,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 411 flow [2023-08-26 11:55:15,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:15,305 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 349 flow [2023-08-26 11:55:15,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-08-26 11:55:15,305 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-08-26 11:55:15,305 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 349 flow [2023-08-26 11:55:15,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:15,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:15,306 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:15,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-26 11:55:15,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:15,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1012327676, now seen corresponding path program 1 times [2023-08-26 11:55:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:15,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341129862] [2023-08-26 11:55:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:15,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:55:15,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341129862] [2023-08-26 11:55:15,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341129862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:15,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:15,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:15,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919975394] [2023-08-26 11:55:15,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:15,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:15,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:15,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:15,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:15,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:15,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:15,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:16,554 INFO L124 PetriNetUnfolderBase]: 11925/16849 cut-off events. [2023-08-26 11:55:16,555 INFO L125 PetriNetUnfolderBase]: For 28615/28615 co-relation queries the response was YES. [2023-08-26 11:55:16,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59536 conditions, 16849 events. 11925/16849 cut-off events. For 28615/28615 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110236 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 59521. Up to 13484 conditions per place. [2023-08-26 11:55:16,654 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-26 11:55:16,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 621 flow [2023-08-26 11:55:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-26 11:55:16,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47770700636942676 [2023-08-26 11:55:16,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-26 11:55:16,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-26 11:55:16,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:16,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-26 11:55:16,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:16,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:16,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:16,658 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 349 flow. Second operand 3 states and 225 transitions. [2023-08-26 11:55:16,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 621 flow [2023-08-26 11:55:16,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 71 transitions, 587 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:16,697 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 319 flow [2023-08-26 11:55:16,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-08-26 11:55:16,697 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-26 11:55:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 319 flow [2023-08-26 11:55:16,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:16,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:16,698 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:16,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-26 11:55:16,698 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:16,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -529065879, now seen corresponding path program 1 times [2023-08-26 11:55:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:16,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285080666] [2023-08-26 11:55:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 11:55:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285080666] [2023-08-26 11:55:16,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285080666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:16,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:16,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:16,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938565581] [2023-08-26 11:55:16,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:16,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:16,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:16,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:16,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:16,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:16,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:16,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:16,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:18,506 INFO L124 PetriNetUnfolderBase]: 14852/22111 cut-off events. [2023-08-26 11:55:18,507 INFO L125 PetriNetUnfolderBase]: For 37417/37417 co-relation queries the response was YES. [2023-08-26 11:55:18,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72699 conditions, 22111 events. 14852/22111 cut-off events. For 37417/37417 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 160953 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 72684. Up to 14769 conditions per place. [2023-08-26 11:55:18,642 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2023-08-26 11:55:18,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 79 transitions, 686 flow [2023-08-26 11:55:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-08-26 11:55:18,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47558386411889597 [2023-08-26 11:55:18,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-08-26 11:55:18,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-08-26 11:55:18,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:18,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-08-26 11:55:18,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,647 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 319 flow. Second operand 3 states and 224 transitions. [2023-08-26 11:55:18,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 79 transitions, 686 flow [2023-08-26 11:55:18,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 678 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:18,659 INFO L231 Difference]: Finished difference. Result has 48 places, 69 transitions, 649 flow [2023-08-26 11:55:18,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=649, PETRI_PLACES=48, PETRI_TRANSITIONS=69} [2023-08-26 11:55:18,660 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-26 11:55:18,660 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 69 transitions, 649 flow [2023-08-26 11:55:18,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:18,660 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:18,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-26 11:55:18,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:18,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash 778830180, now seen corresponding path program 1 times [2023-08-26 11:55:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:18,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318059062] [2023-08-26 11:55:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:18,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 11:55:18,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318059062] [2023-08-26 11:55:18,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318059062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:18,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:18,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561748020] [2023-08-26 11:55:18,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:18,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:18,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:18,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:18,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 69 transitions, 649 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:18,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:20,048 INFO L124 PetriNetUnfolderBase]: 11939/17421 cut-off events. [2023-08-26 11:55:20,048 INFO L125 PetriNetUnfolderBase]: For 46459/46459 co-relation queries the response was YES. [2023-08-26 11:55:20,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69795 conditions, 17421 events. 11939/17421 cut-off events. For 46459/46459 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121113 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 69779. Up to 13486 conditions per place. [2023-08-26 11:55:20,169 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 86 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-26 11:55:20,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 97 transitions, 1072 flow [2023-08-26 11:55:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-26 11:55:20,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713375796178344 [2023-08-26 11:55:20,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-26 11:55:20,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-26 11:55:20,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:20,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-26 11:55:20,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:20,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:20,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:20,173 INFO L175 Difference]: Start difference. First operand has 48 places, 69 transitions, 649 flow. Second operand 3 states and 222 transitions. [2023-08-26 11:55:20,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 97 transitions, 1072 flow [2023-08-26 11:55:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 97 transitions, 1014 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:20,240 INFO L231 Difference]: Finished difference. Result has 47 places, 68 transitions, 603 flow [2023-08-26 11:55:20,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=603, PETRI_PLACES=47, PETRI_TRANSITIONS=68} [2023-08-26 11:55:20,241 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2023-08-26 11:55:20,241 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 68 transitions, 603 flow [2023-08-26 11:55:20,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:20,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:20,241 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-26 11:55:20,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:20,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1279610967, now seen corresponding path program 1 times [2023-08-26 11:55:20,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:20,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501276943] [2023-08-26 11:55:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-26 11:55:20,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501276943] [2023-08-26 11:55:20,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501276943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:20,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:20,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:20,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263849095] [2023-08-26 11:55:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:20,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:20,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:20,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:20,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 68 transitions, 603 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:20,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:20,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:20,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:21,905 INFO L124 PetriNetUnfolderBase]: 13634/21204 cut-off events. [2023-08-26 11:55:21,906 INFO L125 PetriNetUnfolderBase]: For 53657/53657 co-relation queries the response was YES. [2023-08-26 11:55:21,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79177 conditions, 21204 events. 13634/21204 cut-off events. For 53657/53657 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 163473 event pairs, 5130 based on Foata normal form. 0/20302 useless extension candidates. Maximal degree in co-relation 79161. Up to 14771 conditions per place. [2023-08-26 11:55:22,036 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 58 selfloop transitions, 49 changer transitions 0/110 dead transitions. [2023-08-26 11:55:22,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 110 transitions, 1213 flow [2023-08-26 11:55:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-26 11:55:22,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692144373673036 [2023-08-26 11:55:22,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-26 11:55:22,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-26 11:55:22,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:22,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-26 11:55:22,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:22,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:22,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:22,039 INFO L175 Difference]: Start difference. First operand has 47 places, 68 transitions, 603 flow. Second operand 3 states and 221 transitions. [2023-08-26 11:55:22,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 110 transitions, 1213 flow [2023-08-26 11:55:22,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 110 transitions, 1197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:22,064 INFO L231 Difference]: Finished difference. Result has 50 places, 101 transitions, 1213 flow [2023-08-26 11:55:22,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1213, PETRI_PLACES=50, PETRI_TRANSITIONS=101} [2023-08-26 11:55:22,065 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2023-08-26 11:55:22,065 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 101 transitions, 1213 flow [2023-08-26 11:55:22,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:22,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:22,065 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:22,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-26 11:55:22,065 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:22,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1013237290, now seen corresponding path program 1 times [2023-08-26 11:55:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:22,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583863373] [2023-08-26 11:55:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:22,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-26 11:55:22,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:22,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583863373] [2023-08-26 11:55:22,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583863373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:22,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:22,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:22,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759846763] [2023-08-26 11:55:22,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:22,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:22,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:22,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 157 [2023-08-26 11:55:22,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 101 transitions, 1213 flow. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:22,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:22,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 157 [2023-08-26 11:55:22,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:23,692 INFO L124 PetriNetUnfolderBase]: 11331/18039 cut-off events. [2023-08-26 11:55:23,692 INFO L125 PetriNetUnfolderBase]: For 68413/68413 co-relation queries the response was YES. [2023-08-26 11:55:23,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77882 conditions, 18039 events. 11331/18039 cut-off events. For 68413/68413 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 141380 event pairs, 3585 based on Foata normal form. 862/18860 useless extension candidates. Maximal degree in co-relation 77865. Up to 10940 conditions per place. [2023-08-26 11:55:23,814 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-08-26 11:55:23,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 137 transitions, 1875 flow [2023-08-26 11:55:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-26 11:55:23,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46496815286624205 [2023-08-26 11:55:23,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-26 11:55:23,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-26 11:55:23,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:23,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-26 11:55:23,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:23,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:23,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:23,817 INFO L175 Difference]: Start difference. First operand has 50 places, 101 transitions, 1213 flow. Second operand 3 states and 219 transitions. [2023-08-26 11:55:23,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 137 transitions, 1875 flow [2023-08-26 11:55:23,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 137 transitions, 1777 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:23,863 INFO L231 Difference]: Finished difference. Result has 49 places, 100 transitions, 1143 flow [2023-08-26 11:55:23,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1143, PETRI_PLACES=49, PETRI_TRANSITIONS=100} [2023-08-26 11:55:23,863 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-08-26 11:55:23,863 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 100 transitions, 1143 flow [2023-08-26 11:55:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:23,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:23,864 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:23,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-26 11:55:23,864 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:55:23,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1341758841, now seen corresponding path program 1 times [2023-08-26 11:55:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914577911] [2023-08-26 11:55:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:23,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:55:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:23,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:55:23,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:55:23,888 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-26 11:55:23,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (7 of 9 remaining) [2023-08-26 11:55:23,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 11:55:23,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 11:55:23,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 9 remaining) [2023-08-26 11:55:23,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 11:55:23,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 9 remaining) [2023-08-26 11:55:23,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 9 remaining) [2023-08-26 11:55:23,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 11:55:23,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-26 11:55:23,889 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:23,890 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:55:23,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 11:55:23,909 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:55:23,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 102 transitions, 264 flow [2023-08-26 11:55:23,926 INFO L124 PetriNetUnfolderBase]: 7/184 cut-off events. [2023-08-26 11:55:23,926 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 11:55:23,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 184 events. 7/184 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 381 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 177. Up to 14 conditions per place. [2023-08-26 11:55:23,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 102 transitions, 264 flow [2023-08-26 11:55:23,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 102 transitions, 264 flow [2023-08-26 11:55:23,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:55:23,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 102 transitions, 264 flow [2023-08-26 11:55:23,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 102 transitions, 264 flow [2023-08-26 11:55:23,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 102 transitions, 264 flow [2023-08-26 11:55:23,942 INFO L124 PetriNetUnfolderBase]: 7/184 cut-off events. [2023-08-26 11:55:23,942 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 11:55:23,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 184 events. 7/184 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 381 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 177. Up to 14 conditions per place. [2023-08-26 11:55:23,945 INFO L119 LiptonReduction]: Number of co-enabled transitions 5940 [2023-08-26 11:55:25,602 INFO L134 LiptonReduction]: Checked pairs total: 8869 [2023-08-26 11:55:25,602 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-26 11:55:25,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:55:25,604 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;@646cb724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:55:25,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 11:55:25,604 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:55:25,605 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:55:25,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:25,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:25,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:25,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:55:25,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash 30287, now seen corresponding path program 1 times [2023-08-26 11:55:25,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:25,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684895368] [2023-08-26 11:55:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:25,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:25,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:25,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684895368] [2023-08-26 11:55:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684895368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:25,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:25,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:25,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669940990] [2023-08-26 11:55:25,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:25,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:25,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:25,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:25,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:25,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 177 [2023-08-26 11:55:25,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:25,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 177 [2023-08-26 11:55:25,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:30,842 INFO L124 PetriNetUnfolderBase]: 65538/85675 cut-off events. [2023-08-26 11:55:30,843 INFO L125 PetriNetUnfolderBase]: For 39518/39518 co-relation queries the response was YES. [2023-08-26 11:55:31,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182850 conditions, 85675 events. 65538/85675 cut-off events. For 39518/39518 co-relation queries the response was YES. Maximal size of possible extension queue 4391. Compared 522179 event pairs, 65538 based on Foata normal form. 0/55638 useless extension candidates. Maximal degree in co-relation 39567. Up to 81921 conditions per place. [2023-08-26 11:55:31,298 INFO L140 encePairwiseOnDemand]: 174/177 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 11:55:31,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 30 transitions, 174 flow [2023-08-26 11:55:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-26 11:55:31,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670433145009416 [2023-08-26 11:55:31,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-26 11:55:31,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-26 11:55:31,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:31,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-26 11:55:31,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,301 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 124 flow. Second operand 3 states and 248 transitions. [2023-08-26 11:55:31,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 30 transitions, 174 flow [2023-08-26 11:55:31,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 30 transitions, 144 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-26 11:55:31,327 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 92 flow [2023-08-26 11:55:31,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-08-26 11:55:31,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-26 11:55:31,327 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 92 flow [2023-08-26 11:55:31,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:31,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-26 11:55:31,328 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:55:31,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 30286, now seen corresponding path program 1 times [2023-08-26 11:55:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:31,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299548175] [2023-08-26 11:55:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:31,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:31,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299548175] [2023-08-26 11:55:31,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299548175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:31,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:31,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:31,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508058282] [2023-08-26 11:55:31,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:31,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:31,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:31,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:55:31,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:31,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:55:31,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:34,517 INFO L124 PetriNetUnfolderBase]: 42327/57003 cut-off events. [2023-08-26 11:55:34,518 INFO L125 PetriNetUnfolderBase]: For 3410/3410 co-relation queries the response was YES. [2023-08-26 11:55:34,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115380 conditions, 57003 events. 42327/57003 cut-off events. For 3410/3410 co-relation queries the response was YES. Maximal size of possible extension queue 2746. Compared 349576 event pairs, 42327 based on Foata normal form. 0/40164 useless extension candidates. Maximal degree in co-relation 115368. Up to 53249 conditions per place. [2023-08-26 11:55:35,076 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 25 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 11:55:35,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 29 transitions, 142 flow [2023-08-26 11:55:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-08-26 11:55:35,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576271186440678 [2023-08-26 11:55:35,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-08-26 11:55:35,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-08-26 11:55:35,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:35,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-08-26 11:55:35,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:35,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:35,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:35,080 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 92 flow. Second operand 3 states and 243 transitions. [2023-08-26 11:55:35,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 29 transitions, 142 flow [2023-08-26 11:55:35,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 29 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:35,082 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 91 flow [2023-08-26 11:55:35,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-08-26 11:55:35,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-26 11:55:35,083 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 91 flow [2023-08-26 11:55:35,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:35,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:35,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:35,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-26 11:55:35,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:55:35,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash 903143349, now seen corresponding path program 1 times [2023-08-26 11:55:35,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:35,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952475208] [2023-08-26 11:55:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:35,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:35,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:35,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952475208] [2023-08-26 11:55:35,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952475208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:35,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602365387] [2023-08-26 11:55:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:35,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:35,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:35,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:35,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:35,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:55:35,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:35,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:35,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:55:35,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:39,791 INFO L124 PetriNetUnfolderBase]: 62014/82081 cut-off events. [2023-08-26 11:55:39,791 INFO L125 PetriNetUnfolderBase]: For 5435/5435 co-relation queries the response was YES. [2023-08-26 11:55:40,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167568 conditions, 82081 events. 62014/82081 cut-off events. For 5435/5435 co-relation queries the response was YES. Maximal size of possible extension queue 4290. Compared 522934 event pairs, 35952 based on Foata normal form. 0/59906 useless extension candidates. Maximal degree in co-relation 167555. Up to 54027 conditions per place. [2023-08-26 11:55:40,290 INFO L140 encePairwiseOnDemand]: 169/177 looper letters, 41 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-08-26 11:55:40,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 256 flow [2023-08-26 11:55:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 11:55:40,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990583804143126 [2023-08-26 11:55:40,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 11:55:40,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 11:55:40,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:40,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 11:55:40,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,293 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 91 flow. Second operand 3 states and 265 transitions. [2023-08-26 11:55:40,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 256 flow [2023-08-26 11:55:40,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:40,304 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 144 flow [2023-08-26 11:55:40,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-26 11:55:40,304 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-26 11:55:40,304 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 144 flow [2023-08-26 11:55:40,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:40,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-26 11:55:40,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:55:40,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2112148057, now seen corresponding path program 1 times [2023-08-26 11:55:40,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:40,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792933039] [2023-08-26 11:55:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:40,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:40,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:40,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792933039] [2023-08-26 11:55:40,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792933039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:40,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:40,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:40,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015339904] [2023-08-26 11:55:40,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:40,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:40,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:40,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:40,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:55:40,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:40,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:55:40,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:47,695 INFO L124 PetriNetUnfolderBase]: 87642/116859 cut-off events. [2023-08-26 11:55:47,696 INFO L125 PetriNetUnfolderBase]: For 63799/63799 co-relation queries the response was YES. [2023-08-26 11:55:48,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296136 conditions, 116859 events. 87642/116859 cut-off events. For 63799/63799 co-relation queries the response was YES. Maximal size of possible extension queue 6344. Compared 793798 event pairs, 43070 based on Foata normal form. 0/90803 useless extension candidates. Maximal degree in co-relation 296122. Up to 77979 conditions per place. [2023-08-26 11:55:48,802 INFO L140 encePairwiseOnDemand]: 169/177 looper letters, 46 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2023-08-26 11:55:48,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 368 flow [2023-08-26 11:55:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-08-26 11:55:48,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971751412429379 [2023-08-26 11:55:48,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-08-26 11:55:48,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-08-26 11:55:48,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:48,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-08-26 11:55:48,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:48,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:48,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:48,805 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 144 flow. Second operand 3 states and 264 transitions. [2023-08-26 11:55:48,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 368 flow [2023-08-26 11:55:50,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:50,053 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 238 flow [2023-08-26 11:55:50,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-26 11:55:50,053 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-26 11:55:50,053 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 238 flow [2023-08-26 11:55:50,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:50,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:50,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:50,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-26 11:55:50,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:55:50,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1054333389, now seen corresponding path program 1 times [2023-08-26 11:55:50,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:50,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024676647] [2023-08-26 11:55:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:55:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024676647] [2023-08-26 11:55:50,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024676647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:50,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:50,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120743109] [2023-08-26 11:55:50,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:50,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:55:50,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:50,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:50,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:55:50,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:56,026 INFO L124 PetriNetUnfolderBase]: 71236/92293 cut-off events. [2023-08-26 11:55:56,026 INFO L125 PetriNetUnfolderBase]: For 80427/80427 co-relation queries the response was YES. [2023-08-26 11:55:56,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272369 conditions, 92293 events. 71236/92293 cut-off events. For 80427/80427 co-relation queries the response was YES. Maximal size of possible extension queue 5175. Compared 590908 event pairs, 13780 based on Foata normal form. 0/73301 useless extension candidates. Maximal degree in co-relation 272354. Up to 74462 conditions per place. [2023-08-26 11:55:56,755 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 65 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-26 11:55:56,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 499 flow [2023-08-26 11:55:56,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:56,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-08-26 11:55:56,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4952919020715631 [2023-08-26 11:55:56,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-08-26 11:55:56,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-08-26 11:55:56,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:56,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-08-26 11:55:56,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:56,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:56,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:56,759 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 238 flow. Second operand 3 states and 263 transitions. [2023-08-26 11:55:56,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 499 flow [2023-08-26 11:55:57,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 463 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:57,974 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 214 flow [2023-08-26 11:55:57,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-08-26 11:55:57,974 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-26 11:55:57,974 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 214 flow [2023-08-26 11:55:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:57,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:57,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:57,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-26 11:55:57,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:55:57,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1052083763, now seen corresponding path program 1 times [2023-08-26 11:55:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:57,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633980654] [2023-08-26 11:55:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:58,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:58,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633980654] [2023-08-26 11:55:58,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633980654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:58,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:58,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:55:58,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455127408] [2023-08-26 11:55:58,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:58,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:55:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:58,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:55:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:55:58,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:55:58,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:58,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:58,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:55:58,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:02,678 INFO L124 PetriNetUnfolderBase]: 57777/75233 cut-off events. [2023-08-26 11:56:02,678 INFO L125 PetriNetUnfolderBase]: For 53296/53296 co-relation queries the response was YES. [2023-08-26 11:56:02,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214574 conditions, 75233 events. 57777/75233 cut-off events. For 53296/53296 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 471765 event pairs, 9807 based on Foata normal form. 0/60115 useless extension candidates. Maximal degree in co-relation 214559. Up to 60562 conditions per place. [2023-08-26 11:56:03,257 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 62 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-26 11:56:03,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 448 flow [2023-08-26 11:56:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-08-26 11:56:03,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896421845574388 [2023-08-26 11:56:03,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-08-26 11:56:03,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-08-26 11:56:03,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:03,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-08-26 11:56:03,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:03,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:03,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:03,260 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 214 flow. Second operand 3 states and 260 transitions. [2023-08-26 11:56:03,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 448 flow [2023-08-26 11:56:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:56:03,273 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 212 flow [2023-08-26 11:56:03,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-26 11:56:03,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-26 11:56:03,274 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 212 flow [2023-08-26 11:56:03,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:03,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:03,274 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:03,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-26 11:56:03,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:56:03,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2130991927, now seen corresponding path program 1 times [2023-08-26 11:56:03,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:03,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459356657] [2023-08-26 11:56:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:03,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:56:03,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:03,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459356657] [2023-08-26 11:56:03,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459356657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:03,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:03,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032212292] [2023-08-26 11:56:03,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:03,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:03,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:03,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:03,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:56:03,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:03,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:03,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:56:03,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:10,364 INFO L124 PetriNetUnfolderBase]: 78368/106611 cut-off events. [2023-08-26 11:56:10,364 INFO L125 PetriNetUnfolderBase]: For 99801/99801 co-relation queries the response was YES. [2023-08-26 11:56:10,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301473 conditions, 106611 events. 78368/106611 cut-off events. For 99801/99801 co-relation queries the response was YES. Maximal size of possible extension queue 6232. Compared 756743 event pairs, 34508 based on Foata normal form. 0/86986 useless extension candidates. Maximal degree in co-relation 301458. Up to 72725 conditions per place. [2023-08-26 11:56:11,217 INFO L140 encePairwiseOnDemand]: 169/177 looper letters, 50 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2023-08-26 11:56:11,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 509 flow [2023-08-26 11:56:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-08-26 11:56:11,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487758945386064 [2023-08-26 11:56:11,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-08-26 11:56:11,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-08-26 11:56:11,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:11,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-08-26 11:56:11,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:11,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:11,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:11,220 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 212 flow. Second operand 3 states and 259 transitions. [2023-08-26 11:56:11,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 509 flow [2023-08-26 11:56:11,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:56:11,260 INFO L231 Difference]: Finished difference. Result has 52 places, 60 transitions, 432 flow [2023-08-26 11:56:11,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=52, PETRI_TRANSITIONS=60} [2023-08-26 11:56:11,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2023-08-26 11:56:11,260 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 60 transitions, 432 flow [2023-08-26 11:56:11,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:11,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:11,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:11,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-26 11:56:11,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:56:11,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1636236531, now seen corresponding path program 1 times [2023-08-26 11:56:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:11,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398401766] [2023-08-26 11:56:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:11,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:56:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:11,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398401766] [2023-08-26 11:56:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398401766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:11,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:11,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:56:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458140097] [2023-08-26 11:56:11,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:56:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:56:11,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:56:11,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:56:11,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:11,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:11,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:56:11,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:17,079 INFO L124 PetriNetUnfolderBase]: 63123/83371 cut-off events. [2023-08-26 11:56:17,079 INFO L125 PetriNetUnfolderBase]: For 140677/140677 co-relation queries the response was YES. [2023-08-26 11:56:17,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290091 conditions, 83371 events. 63123/83371 cut-off events. For 140677/140677 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 551496 event pairs, 11449 based on Foata normal form. 4008/74526 useless extension candidates. Maximal degree in co-relation 290075. Up to 66634 conditions per place. [2023-08-26 11:56:17,693 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-26 11:56:17,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 89 transitions, 783 flow [2023-08-26 11:56:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-26 11:56:17,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839924670433145 [2023-08-26 11:56:17,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-26 11:56:17,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-26 11:56:17,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:17,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-26 11:56:17,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:17,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:17,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:17,695 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 432 flow. Second operand 3 states and 257 transitions. [2023-08-26 11:56:17,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 89 transitions, 783 flow [2023-08-26 11:56:17,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 741 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:17,969 INFO L231 Difference]: Finished difference. Result has 51 places, 59 transitions, 394 flow [2023-08-26 11:56:17,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=51, PETRI_TRANSITIONS=59} [2023-08-26 11:56:17,969 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2023-08-26 11:56:17,969 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 59 transitions, 394 flow [2023-08-26 11:56:17,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:17,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:17,969 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:17,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-26 11:56:17,969 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:56:17,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:17,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1539485958, now seen corresponding path program 1 times [2023-08-26 11:56:17,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:17,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393494557] [2023-08-26 11:56:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 11:56:17,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:17,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393494557] [2023-08-26 11:56:18,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393494557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:18,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858430384] [2023-08-26 11:56:18,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:18,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:18,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:56:18,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:18,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:18,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:56:18,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:26,099 INFO L124 PetriNetUnfolderBase]: 82894/114621 cut-off events. [2023-08-26 11:56:26,099 INFO L125 PetriNetUnfolderBase]: For 202351/202351 co-relation queries the response was YES. [2023-08-26 11:56:26,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372685 conditions, 114621 events. 82894/114621 cut-off events. For 202351/202351 co-relation queries the response was YES. Maximal size of possible extension queue 7139. Compared 852156 event pairs, 32594 based on Foata normal form. 0/98741 useless extension candidates. Maximal degree in co-relation 372669. Up to 78927 conditions per place. [2023-08-26 11:56:27,006 INFO L140 encePairwiseOnDemand]: 169/177 looper letters, 61 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2023-08-26 11:56:27,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 101 transitions, 880 flow [2023-08-26 11:56:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-08-26 11:56:27,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4821092278719397 [2023-08-26 11:56:27,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-08-26 11:56:27,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-08-26 11:56:27,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:27,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-08-26 11:56:27,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,008 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 394 flow. Second operand 3 states and 256 transitions. [2023-08-26 11:56:27,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 101 transitions, 880 flow [2023-08-26 11:56:27,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 101 transitions, 872 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:56:27,053 INFO L231 Difference]: Finished difference. Result has 54 places, 88 transitions, 836 flow [2023-08-26 11:56:27,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=836, PETRI_PLACES=54, PETRI_TRANSITIONS=88} [2023-08-26 11:56:27,053 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-08-26 11:56:27,054 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 88 transitions, 836 flow [2023-08-26 11:56:27,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:27,054 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-26 11:56:27,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:56:27,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash -479420346, now seen corresponding path program 1 times [2023-08-26 11:56:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549372103] [2023-08-26 11:56:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 11:56:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549372103] [2023-08-26 11:56:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549372103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:27,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:27,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:56:27,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503833753] [2023-08-26 11:56:27,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:56:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:56:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:56:27,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:56:27,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 88 transitions, 836 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:27,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:56:27,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:33,697 INFO L124 PetriNetUnfolderBase]: 66491/89377 cut-off events. [2023-08-26 11:56:33,697 INFO L125 PetriNetUnfolderBase]: For 243725/243725 co-relation queries the response was YES. [2023-08-26 11:56:34,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353394 conditions, 89377 events. 66491/89377 cut-off events. For 243725/243725 co-relation queries the response was YES. Maximal size of possible extension queue 5781. Compared 624059 event pairs, 13367 based on Foata normal form. 4542/84597 useless extension candidates. Maximal degree in co-relation 353377. Up to 70760 conditions per place. [2023-08-26 11:56:34,660 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 117 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2023-08-26 11:56:34,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 128 transitions, 1422 flow [2023-08-26 11:56:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-26 11:56:34,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783427495291902 [2023-08-26 11:56:34,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-26 11:56:34,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-26 11:56:34,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:34,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-26 11:56:34,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:34,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:34,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:34,663 INFO L175 Difference]: Start difference. First operand has 54 places, 88 transitions, 836 flow. Second operand 3 states and 254 transitions. [2023-08-26 11:56:34,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 128 transitions, 1422 flow [2023-08-26 11:56:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 128 transitions, 1348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:35,124 INFO L231 Difference]: Finished difference. Result has 53 places, 87 transitions, 774 flow [2023-08-26 11:56:35,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=774, PETRI_PLACES=53, PETRI_TRANSITIONS=87} [2023-08-26 11:56:35,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-08-26 11:56:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 87 transitions, 774 flow [2023-08-26 11:56:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:35,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:35,125 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:35,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-08-26 11:56:35,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:56:35,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1559885561, now seen corresponding path program 1 times [2023-08-26 11:56:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:35,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348017039] [2023-08-26 11:56:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:35,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-26 11:56:35,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:35,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348017039] [2023-08-26 11:56:35,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348017039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:35,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:35,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:35,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666564974] [2023-08-26 11:56:35,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:35,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:35,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:35,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:35,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:35,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:56:35,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 87 transitions, 774 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:35,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:35,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:56:35,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:44,123 INFO L124 PetriNetUnfolderBase]: 83744/117939 cut-off events. [2023-08-26 11:56:44,123 INFO L125 PetriNetUnfolderBase]: For 338138/338138 co-relation queries the response was YES. [2023-08-26 11:56:44,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437269 conditions, 117939 events. 83744/117939 cut-off events. For 338138/338138 co-relation queries the response was YES. Maximal size of possible extension queue 7940. Compared 915908 event pairs, 30074 based on Foata normal form. 0/107390 useless extension candidates. Maximal degree in co-relation 437252. Up to 82253 conditions per place. [2023-08-26 11:56:45,339 INFO L140 encePairwiseOnDemand]: 169/177 looper letters, 80 selfloop transitions, 65 changer transitions 0/148 dead transitions. [2023-08-26 11:56:45,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 148 transitions, 1631 flow [2023-08-26 11:56:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-26 11:56:45,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4764595103578154 [2023-08-26 11:56:45,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-26 11:56:45,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-26 11:56:45,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:45,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-26 11:56:45,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:45,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:45,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:45,342 INFO L175 Difference]: Start difference. First operand has 53 places, 87 transitions, 774 flow. Second operand 3 states and 253 transitions. [2023-08-26 11:56:45,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 148 transitions, 1631 flow [2023-08-26 11:56:45,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 148 transitions, 1615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:56:45,489 INFO L231 Difference]: Finished difference. Result has 56 places, 136 transitions, 1640 flow [2023-08-26 11:56:45,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1640, PETRI_PLACES=56, PETRI_TRANSITIONS=136} [2023-08-26 11:56:45,489 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-08-26 11:56:45,489 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 136 transitions, 1640 flow [2023-08-26 11:56:45,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:45,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:45,490 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:45,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-26 11:56:45,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:56:45,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1111807740, now seen corresponding path program 1 times [2023-08-26 11:56:45,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:45,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023664796] [2023-08-26 11:56:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-26 11:56:45,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:45,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023664796] [2023-08-26 11:56:45,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023664796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:45,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:45,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:56:45,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217792433] [2023-08-26 11:56:45,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:45,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:56:45,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:56:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:56:45,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:56:45,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 136 transitions, 1640 flow. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:45,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:45,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:56:45,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:53,136 INFO L124 PetriNetUnfolderBase]: 67349/92869 cut-off events. [2023-08-26 11:56:53,136 INFO L125 PetriNetUnfolderBase]: For 378525/378525 co-relation queries the response was YES. [2023-08-26 11:56:53,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412577 conditions, 92869 events. 67349/92869 cut-off events. For 378525/378525 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 685517 event pairs, 15691 based on Foata normal form. 4796/92936 useless extension candidates. Maximal degree in co-relation 412559. Up to 70802 conditions per place. [2023-08-26 11:56:53,919 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 175 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2023-08-26 11:56:53,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 194 transitions, 2659 flow [2023-08-26 11:56:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-26 11:56:53,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726930320150659 [2023-08-26 11:56:53,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-26 11:56:53,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-26 11:56:53,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:53,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-26 11:56:53,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:53,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:53,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:53,921 INFO L175 Difference]: Start difference. First operand has 56 places, 136 transitions, 1640 flow. Second operand 3 states and 251 transitions. [2023-08-26 11:56:53,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 194 transitions, 2659 flow [2023-08-26 11:56:54,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 194 transitions, 2529 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:54,445 INFO L231 Difference]: Finished difference. Result has 55 places, 135 transitions, 1538 flow [2023-08-26 11:56:54,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1538, PETRI_PLACES=55, PETRI_TRANSITIONS=135} [2023-08-26 11:56:54,445 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-26 11:56:54,446 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 135 transitions, 1538 flow [2023-08-26 11:56:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:54,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:54,446 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:54,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-26 11:56:54,446 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:56:54,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash 952781258, now seen corresponding path program 1 times [2023-08-26 11:56:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:54,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893013027] [2023-08-26 11:56:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-26 11:56:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893013027] [2023-08-26 11:56:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893013027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:54,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:54,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:54,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702502931] [2023-08-26 11:56:54,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:54,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:54,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:54,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:56:54,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 135 transitions, 1538 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:54,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:54,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:56:54,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:57:04,142 INFO L124 PetriNetUnfolderBase]: 78886/114494 cut-off events. [2023-08-26 11:57:04,142 INFO L125 PetriNetUnfolderBase]: For 460187/460187 co-relation queries the response was YES. [2023-08-26 11:57:04,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478505 conditions, 114494 events. 78886/114494 cut-off events. For 460187/460187 co-relation queries the response was YES. Maximal size of possible extension queue 8549. Compared 937711 event pairs, 27980 based on Foata normal form. 0/110251 useless extension candidates. Maximal degree in co-relation 478487. Up to 83371 conditions per place. [2023-08-26 11:57:05,096 INFO L140 encePairwiseOnDemand]: 169/177 looper letters, 111 selfloop transitions, 113 changer transitions 0/227 dead transitions. [2023-08-26 11:57:05,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 227 transitions, 3086 flow [2023-08-26 11:57:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:57:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:57:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-26 11:57:05,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708097928436911 [2023-08-26 11:57:05,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-26 11:57:05,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-26 11:57:05,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:57:05,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-26 11:57:05,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,098 INFO L175 Difference]: Start difference. First operand has 55 places, 135 transitions, 1538 flow. Second operand 3 states and 250 transitions. [2023-08-26 11:57:05,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 227 transitions, 3086 flow [2023-08-26 11:57:05,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 227 transitions, 3054 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:57:05,801 INFO L231 Difference]: Finished difference. Result has 58 places, 216 transitions, 3180 flow [2023-08-26 11:57:05,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3180, PETRI_PLACES=58, PETRI_TRANSITIONS=216} [2023-08-26 11:57:05,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-26 11:57:05,802 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 216 transitions, 3180 flow [2023-08-26 11:57:05,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:05,802 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:57:05,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-26 11:57:05,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:57:05,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash -528547019, now seen corresponding path program 1 times [2023-08-26 11:57:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:05,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797399801] [2023-08-26 11:57:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:05,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:57:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-26 11:57:05,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:57:05,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797399801] [2023-08-26 11:57:05,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797399801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:57:05,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:57:05,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:57:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823167957] [2023-08-26 11:57:05,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:57:05,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:57:05,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:57:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:57:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:57:05,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-08-26 11:57:05,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 216 transitions, 3180 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:57:05,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-08-26 11:57:05,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:57:14,865 INFO L124 PetriNetUnfolderBase]: 65645/97131 cut-off events. [2023-08-26 11:57:14,865 INFO L125 PetriNetUnfolderBase]: For 544589/544589 co-relation queries the response was YES. [2023-08-26 11:57:15,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463008 conditions, 97131 events. 65645/97131 cut-off events. For 544589/544589 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 809203 event pairs, 20879 based on Foata normal form. 4122/101132 useless extension candidates. Maximal degree in co-relation 462989. Up to 58024 conditions per place. [2023-08-26 11:57:15,705 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 266 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2023-08-26 11:57:15,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 301 transitions, 4939 flow [2023-08-26 11:57:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:57:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:57:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-26 11:57:15,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670433145009416 [2023-08-26 11:57:15,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-26 11:57:15,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-26 11:57:15,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:57:15,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-26 11:57:15,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:15,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:15,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:15,709 INFO L175 Difference]: Start difference. First operand has 58 places, 216 transitions, 3180 flow. Second operand 3 states and 248 transitions. [2023-08-26 11:57:15,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 301 transitions, 4939 flow [2023-08-26 11:57:16,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 301 transitions, 4713 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:57:16,286 INFO L231 Difference]: Finished difference. Result has 57 places, 215 transitions, 3014 flow [2023-08-26 11:57:16,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3014, PETRI_PLACES=57, PETRI_TRANSITIONS=215} [2023-08-26 11:57:16,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2023-08-26 11:57:16,287 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 215 transitions, 3014 flow [2023-08-26 11:57:16,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:16,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:16,287 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:57:16,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-08-26 11:57:16,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:57:16,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:16,287 INFO L85 PathProgramCache]: Analyzing trace with hash 790413959, now seen corresponding path program 1 times [2023-08-26 11:57:16,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:16,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412159645] [2023-08-26 11:57:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:16,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:57:16,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:57:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:57:16,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:57:16,312 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:57:16,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-26 11:57:16,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (8 of 10 remaining) [2023-08-26 11:57:16,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 11:57:16,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 11:57:16,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 10 remaining) [2023-08-26 11:57:16,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 10 remaining) [2023-08-26 11:57:16,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 11:57:16,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 10 remaining) [2023-08-26 11:57:16,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 10 remaining) [2023-08-26 11:57:16,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 10 remaining) [2023-08-26 11:57:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-08-26 11:57:16,313 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:57:16,314 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:57:16,314 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 11:57:16,341 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:57:16,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 114 transitions, 305 flow [2023-08-26 11:57:16,357 INFO L124 PetriNetUnfolderBase]: 8/210 cut-off events. [2023-08-26 11:57:16,357 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-26 11:57:16,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 210 events. 8/210 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 464 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 211. Up to 16 conditions per place. [2023-08-26 11:57:16,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 114 transitions, 305 flow [2023-08-26 11:57:16,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 114 transitions, 305 flow [2023-08-26 11:57:16,359 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:57:16,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 114 transitions, 305 flow [2023-08-26 11:57:16,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 114 transitions, 305 flow [2023-08-26 11:57:16,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 114 transitions, 305 flow [2023-08-26 11:57:16,370 INFO L124 PetriNetUnfolderBase]: 8/210 cut-off events. [2023-08-26 11:57:16,370 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-26 11:57:16,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 210 events. 8/210 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 464 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 211. Up to 16 conditions per place. [2023-08-26 11:57:16,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 7854 [2023-08-26 11:57:18,007 INFO L134 LiptonReduction]: Checked pairs total: 13499 [2023-08-26 11:57:18,008 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-26 11:57:18,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:57:18,009 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;@646cb724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:57:18,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 11:57:18,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:57:18,010 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:57:18,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:57:18,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:18,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:57:18,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 11:57:18,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash 36976, now seen corresponding path program 1 times [2023-08-26 11:57:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:18,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260898538] [2023-08-26 11:57:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:57:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:57:18,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:57:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260898538] [2023-08-26 11:57:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260898538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:57:18,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:57:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:57:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922854921] [2023-08-26 11:57:18,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:57:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:57:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:57:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:57:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:57:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-26 11:57:18,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:18,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:57:18,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-26 11:57:18,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:57:41,720 INFO L124 PetriNetUnfolderBase]: 311298/391851 cut-off events. [2023-08-26 11:57:41,721 INFO L125 PetriNetUnfolderBase]: For 217694/217694 co-relation queries the response was YES. [2023-08-26 11:57:42,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839235 conditions, 391851 events. 311298/391851 cut-off events. For 217694/217694 co-relation queries the response was YES. Maximal size of possible extension queue 16797. Compared 2451337 event pairs, 311298 based on Foata normal form. 0/255318 useless extension candidates. Maximal degree in co-relation 185231. Up to 376833 conditions per place. [2023-08-26 11:57:44,312 INFO L140 encePairwiseOnDemand]: 194/197 looper letters, 30 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-26 11:57:44,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 34 transitions, 207 flow [2023-08-26 11:57:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:57:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:57:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2023-08-26 11:57:44,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467005076142132 [2023-08-26 11:57:44,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2023-08-26 11:57:44,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2023-08-26 11:57:44,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:57:44,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2023-08-26 11:57:44,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:44,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:44,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:44,315 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 149 flow. Second operand 3 states and 276 transitions. [2023-08-26 11:57:44,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 34 transitions, 207 flow [2023-08-26 11:57:44,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 34 transitions, 165 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-26 11:57:44,510 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 105 flow [2023-08-26 11:57:44,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2023-08-26 11:57:44,510 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-26 11:57:44,510 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 105 flow [2023-08-26 11:57:44,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:44,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:44,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:57:44,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-08-26 11:57:44,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 11:57:44,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 36977, now seen corresponding path program 1 times [2023-08-26 11:57:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:44,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930331290] [2023-08-26 11:57:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:57:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:57:44,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:57:44,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930331290] [2023-08-26 11:57:44,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930331290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:57:44,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:57:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:57:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081358553] [2023-08-26 11:57:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:57:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:57:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:57:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:57:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:57:44,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-08-26 11:57:44,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:44,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:57:44,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-08-26 11:57:44,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:58:01,538 INFO L124 PetriNetUnfolderBase]: 202071/260779 cut-off events. [2023-08-26 11:58:01,538 INFO L125 PetriNetUnfolderBase]: For 13650/13650 co-relation queries the response was YES. [2023-08-26 11:58:02,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527029 conditions, 260779 events. 202071/260779 cut-off events. For 13650/13650 co-relation queries the response was YES. Maximal size of possible extension queue 10338. Compared 1658415 event pairs, 202071 based on Foata normal form. 0/182500 useless extension candidates. Maximal degree in co-relation 527016. Up to 245761 conditions per place. [2023-08-26 11:58:03,498 INFO L140 encePairwiseOnDemand]: 195/197 looper letters, 29 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 11:58:03,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 33 transitions, 163 flow [2023-08-26 11:58:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:58:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:58:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-26 11:58:03,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4686971235194585 [2023-08-26 11:58:03,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-26 11:58:03,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-26 11:58:03,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:58:03,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-26 11:58:03,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:03,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:03,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:03,500 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 105 flow. Second operand 3 states and 277 transitions. [2023-08-26 11:58:03,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 33 transitions, 163 flow [2023-08-26 11:58:03,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 33 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:58:03,609 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 104 flow [2023-08-26 11:58:03,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2023-08-26 11:58:03,609 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-26 11:58:03,609 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 104 flow [2023-08-26 11:58:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:03,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:58:03,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:58:03,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-08-26 11:58:03,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 11:58:03,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:58:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1102554605, now seen corresponding path program 1 times [2023-08-26 11:58:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:58:03,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621625287] [2023-08-26 11:58:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:58:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:58:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:58:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:58:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:58:03,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621625287] [2023-08-26 11:58:03,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621625287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:58:03,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:58:03,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:58:03,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084113049] [2023-08-26 11:58:03,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:58:03,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:58:03,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:58:03,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:58:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:58:03,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 11:58:03,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 33 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:03,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:58:03,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 11:58:03,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:58:27,063 INFO L124 PetriNetUnfolderBase]: 297494/377965 cut-off events. [2023-08-26 11:58:27,063 INFO L125 PetriNetUnfolderBase]: For 21816/21816 co-relation queries the response was YES. [2023-08-26 11:58:28,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769574 conditions, 377965 events. 297494/377965 cut-off events. For 21816/21816 co-relation queries the response was YES. Maximal size of possible extension queue 16101. Compared 2470778 event pairs, 176580 based on Foata normal form. 0/272848 useless extension candidates. Maximal degree in co-relation 769560. Up to 254687 conditions per place. [2023-08-26 11:58:29,691 INFO L140 encePairwiseOnDemand]: 188/197 looper letters, 48 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-08-26 11:58:29,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 298 flow [2023-08-26 11:58:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:58:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:58:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-26 11:58:29,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025380710659898 [2023-08-26 11:58:29,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-26 11:58:29,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-26 11:58:29,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:58:29,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-26 11:58:29,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:29,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:29,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:29,694 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 104 flow. Second operand 3 states and 297 transitions. [2023-08-26 11:58:29,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 298 flow [2023-08-26 11:58:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:58:29,735 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 165 flow [2023-08-26 11:58:29,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-26 11:58:29,736 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-26 11:58:29,736 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 165 flow [2023-08-26 11:58:29,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:29,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:58:29,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:58:29,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-08-26 11:58:29,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 11:58:29,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:58:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1847390483, now seen corresponding path program 1 times [2023-08-26 11:58:29,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:58:29,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657790771] [2023-08-26 11:58:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:58:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:58:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:58:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:58:29,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:58:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657790771] [2023-08-26 11:58:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657790771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:58:29,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:58:29,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:58:29,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535745178] [2023-08-26 11:58:29,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:58:29,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:58:29,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:58:29,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:58:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:58:29,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 11:58:29,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:29,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:58:29,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 11:58:29,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:59:14,927 INFO L124 PetriNetUnfolderBase]: 423576/541309 cut-off events. [2023-08-26 11:59:14,927 INFO L125 PetriNetUnfolderBase]: For 286495/286495 co-relation queries the response was YES. [2023-08-26 11:59:17,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365246 conditions, 541309 events. 423576/541309 cut-off events. For 286495/286495 co-relation queries the response was YES. Maximal size of possible extension queue 23989. Compared 3729778 event pairs, 215810 based on Foata normal form. 0/413115 useless extension candidates. Maximal degree in co-relation 1365231. Up to 370121 conditions per place. [2023-08-26 11:59:19,594 INFO L140 encePairwiseOnDemand]: 188/197 looper letters, 54 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2023-08-26 11:59:19,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 430 flow [2023-08-26 11:59:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:59:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:59:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-26 11:59:19,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008460236886633 [2023-08-26 11:59:19,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-26 11:59:19,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-26 11:59:19,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:59:19,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-26 11:59:19,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:59:19,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:59:19,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:59:19,597 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 165 flow. Second operand 3 states and 296 transitions. [2023-08-26 11:59:19,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 430 flow [2023-08-26 12:00:19,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 71 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:00:19,285 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 277 flow [2023-08-26 12:00:19,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-08-26 12:00:19,285 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-26 12:00:19,286 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 277 flow [2023-08-26 12:00:19,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:00:19,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:00:19,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:00:19,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-08-26 12:00:19,286 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 12:00:19,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:00:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1432069823, now seen corresponding path program 1 times [2023-08-26 12:00:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:00:19,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399686838] [2023-08-26 12:00:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:00:19,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:00:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:00:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:00:19,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:00:19,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399686838] [2023-08-26 12:00:19,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399686838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:00:19,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:00:19,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:00:19,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272120180] [2023-08-26 12:00:19,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:00:19,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:00:19,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:00:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:00:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:00:19,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 12:00:19,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:00:19,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:00:19,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 12:00:19,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:00:50,441 INFO L124 PetriNetUnfolderBase]: 345272/429917 cut-off events. [2023-08-26 12:00:50,442 INFO L125 PetriNetUnfolderBase]: For 362722/362722 co-relation queries the response was YES. [2023-08-26 12:00:52,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258873 conditions, 429917 events. 345272/429917 cut-off events. For 362722/362722 co-relation queries the response was YES. Maximal size of possible extension queue 19479. Compared 2774406 event pairs, 66448 based on Foata normal form. 0/337171 useless extension candidates. Maximal degree in co-relation 1258857. Up to 345956 conditions per place. [2023-08-26 12:00:54,320 INFO L140 encePairwiseOnDemand]: 195/197 looper letters, 77 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-26 12:00:54,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 587 flow [2023-08-26 12:00:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:00:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:00:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-08-26 12:00:54,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49915397631133673 [2023-08-26 12:00:54,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-08-26 12:00:54,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-08-26 12:00:54,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:00:54,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-08-26 12:00:54,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:00:54,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:00:54,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:00:54,323 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 277 flow. Second operand 3 states and 295 transitions. [2023-08-26 12:00:54,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 587 flow [2023-08-26 12:01:47,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 545 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:01:47,039 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 249 flow [2023-08-26 12:01:47,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-08-26 12:01:47,040 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-26 12:01:47,040 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 249 flow [2023-08-26 12:01:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:01:47,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:01:47,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:01:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2023-08-26 12:01:47,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 12:01:47,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:01:47,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1434525942, now seen corresponding path program 1 times [2023-08-26 12:01:47,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:01:47,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015299459] [2023-08-26 12:01:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:01:47,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:01:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:01:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 12:01:47,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:01:47,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015299459] [2023-08-26 12:01:47,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015299459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:01:47,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:01:47,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:01:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958946066] [2023-08-26 12:01:47,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:01:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:01:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:01:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:01:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:01:47,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 12:01:47,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:01:47,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:01:47,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 12:01:47,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:02:12,262 INFO L124 PetriNetUnfolderBase]: 280909/351017 cut-off events. [2023-08-26 12:02:12,262 INFO L125 PetriNetUnfolderBase]: For 239234/239234 co-relation queries the response was YES. [2023-08-26 12:02:13,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992747 conditions, 351017 events. 280909/351017 cut-off events. For 239234/239234 co-relation queries the response was YES. Maximal size of possible extension queue 16167. Compared 2228421 event pairs, 48119 based on Foata normal form. 0/274201 useless extension candidates. Maximal degree in co-relation 992731. Up to 281912 conditions per place. [2023-08-26 12:02:15,283 INFO L140 encePairwiseOnDemand]: 195/197 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-26 12:02:15,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 530 flow [2023-08-26 12:02:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:02:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:02:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-26 12:02:15,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494077834179357 [2023-08-26 12:02:15,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-26 12:02:15,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-26 12:02:15,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:02:15,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-26 12:02:15,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:02:15,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:02:15,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:02:15,285 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 249 flow. Second operand 3 states and 292 transitions. [2023-08-26 12:02:15,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 530 flow [2023-08-26 12:02:15,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:02:15,328 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 247 flow [2023-08-26 12:02:15,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-26 12:02:15,328 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-26 12:02:15,328 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 247 flow [2023-08-26 12:02:15,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:02:15,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:02:15,329 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 12:02:15,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-08-26 12:02:15,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 12:02:15,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:02:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1512829660, now seen corresponding path program 1 times [2023-08-26 12:02:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:02:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282406392] [2023-08-26 12:02:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:02:15,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:02:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:02:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 12:02:15,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:02:15,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282406392] [2023-08-26 12:02:15,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282406392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:02:15,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:02:15,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:02:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631412700] [2023-08-26 12:02:15,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:02:15,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:02:15,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:02:15,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:02:15,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:02:15,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 12:02:15,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:02:15,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:02:15,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 12:02:15,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:02:55,111 INFO L124 PetriNetUnfolderBase]: 385656/500287 cut-off events. [2023-08-26 12:02:55,111 INFO L125 PetriNetUnfolderBase]: For 463772/463772 co-relation queries the response was YES. [2023-08-26 12:02:57,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404947 conditions, 500287 events. 385656/500287 cut-off events. For 463772/463772 co-relation queries the response was YES. Maximal size of possible extension queue 23417. Compared 3591006 event pairs, 176836 based on Foata normal form. 0/398680 useless extension candidates. Maximal degree in co-relation 1404931. Up to 349769 conditions per place. [2023-08-26 12:03:00,395 INFO L140 encePairwiseOnDemand]: 188/197 looper letters, 60 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-08-26 12:03:00,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 88 transitions, 607 flow [2023-08-26 12:03:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:03:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:03:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-08-26 12:03:00,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49238578680203043 [2023-08-26 12:03:00,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-08-26 12:03:00,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-08-26 12:03:00,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:03:00,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-08-26 12:03:00,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:00,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:00,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:00,398 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 247 flow. Second operand 3 states and 291 transitions. [2023-08-26 12:03:00,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 88 transitions, 607 flow [2023-08-26 12:03:03,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 603 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:03:03,610 INFO L231 Difference]: Finished difference. Result has 58 places, 71 transitions, 515 flow [2023-08-26 12:03:03,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=515, PETRI_PLACES=58, PETRI_TRANSITIONS=71} [2023-08-26 12:03:03,611 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-26 12:03:03,611 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 71 transitions, 515 flow [2023-08-26 12:03:03,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:03,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:03:03,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:03:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2023-08-26 12:03:03,611 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 12:03:03,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:03:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash 346925639, now seen corresponding path program 1 times [2023-08-26 12:03:03,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:03:03,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018133571] [2023-08-26 12:03:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:03:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:03:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:03:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 12:03:03,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:03:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018133571] [2023-08-26 12:03:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018133571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:03:03,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:03:03,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:03:03,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274575522] [2023-08-26 12:03:03,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:03:03,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:03:03,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:03:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:03:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:03:03,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 12:03:03,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 515 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:03,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:03:03,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 12:03:03,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:03:37,080 INFO L124 PetriNetUnfolderBase]: 311645/393393 cut-off events. [2023-08-26 12:03:37,080 INFO L125 PetriNetUnfolderBase]: For 652015/652015 co-relation queries the response was YES. [2023-08-26 12:03:39,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350530 conditions, 393393 events. 311645/393393 cut-off events. For 652015/652015 co-relation queries the response was YES. Maximal size of possible extension queue 19046. Compared 2623312 event pairs, 55633 based on Foata normal form. 16278/339366 useless extension candidates. Maximal degree in co-relation 1350513. Up to 313668 conditions per place. [2023-08-26 12:03:41,116 INFO L140 encePairwiseOnDemand]: 195/197 looper letters, 100 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-26 12:03:41,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 107 transitions, 945 flow [2023-08-26 12:03:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:03:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:03:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-08-26 12:03:41,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890016920473773 [2023-08-26 12:03:41,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-08-26 12:03:41,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-08-26 12:03:41,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:03:41,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-08-26 12:03:41,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:41,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:41,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:41,123 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 515 flow. Second operand 3 states and 289 transitions. [2023-08-26 12:03:41,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 107 transitions, 945 flow [2023-08-26 12:03:53,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 107 transitions, 895 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:03:53,454 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 469 flow [2023-08-26 12:03:53,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=469, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2023-08-26 12:03:53,455 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-26 12:03:53,455 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 469 flow [2023-08-26 12:03:53,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:53,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:03:53,455 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:03:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2023-08-26 12:03:53,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 12:03:53,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:03:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1010079372, now seen corresponding path program 1 times [2023-08-26 12:03:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:03:53,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838036410] [2023-08-26 12:03:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:03:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:03:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:03:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:03:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:03:53,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838036410] [2023-08-26 12:03:53,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838036410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:03:53,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:03:53,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:03:53,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440934084] [2023-08-26 12:03:53,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:03:53,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:03:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:03:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:03:53,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:03:53,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 12:03:53,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:53,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:03:53,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 12:03:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:04:39,144 INFO L124 PetriNetUnfolderBase]: 417794/548677 cut-off events. [2023-08-26 12:04:39,144 INFO L125 PetriNetUnfolderBase]: For 983585/983585 co-relation queries the response was YES. [2023-08-26 12:04:42,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767729 conditions, 548677 events. 417794/548677 cut-off events. For 983585/983585 co-relation queries the response was YES. Maximal size of possible extension queue 26916. Compared 4118877 event pairs, 172730 based on Foata normal form. 0/458425 useless extension candidates. Maximal degree in co-relation 1767712. Up to 387351 conditions per place. [2023-08-26 12:04:45,353 INFO L140 encePairwiseOnDemand]: 188/197 looper letters, 75 selfloop transitions, 45 changer transitions 0/123 dead transitions. [2023-08-26 12:04:45,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 123 transitions, 1074 flow [2023-08-26 12:04:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:04:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:04:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-08-26 12:04:45,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873096446700508 [2023-08-26 12:04:45,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-08-26 12:04:45,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-08-26 12:04:45,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:04:45,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-08-26 12:04:45,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:04:45,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:04:45,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:04:45,355 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 469 flow. Second operand 3 states and 288 transitions. [2023-08-26 12:04:45,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 123 transitions, 1074 flow [2023-08-26 12:04:45,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 123 transitions, 1066 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:04:45,862 INFO L231 Difference]: Finished difference. Result has 60 places, 107 transitions, 1023 flow [2023-08-26 12:04:45,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1023, PETRI_PLACES=60, PETRI_TRANSITIONS=107} [2023-08-26 12:04:45,862 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-26 12:04:45,862 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 107 transitions, 1023 flow [2023-08-26 12:04:45,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:04:45,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:04:45,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:04:45,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2023-08-26 12:04:45,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 12:04:45,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:04:45,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1247694633, now seen corresponding path program 1 times [2023-08-26 12:04:45,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:04:45,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711467948] [2023-08-26 12:04:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:04:45,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:04:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:04:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:04:45,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:04:45,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711467948] [2023-08-26 12:04:45,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711467948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:04:45,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:04:45,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:04:45,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133844412] [2023-08-26 12:04:45,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:04:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:04:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:04:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:04:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:04:45,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-26 12:04:45,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 107 transitions, 1023 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:04:45,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:04:45,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-26 12:04:45,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:05:29,160 INFO L124 PetriNetUnfolderBase]: 335923/429061 cut-off events. [2023-08-26 12:05:29,160 INFO L125 PetriNetUnfolderBase]: For 1173031/1173031 co-relation queries the response was YES. [2023-08-26 12:05:31,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670369 conditions, 429061 events. 335923/429061 cut-off events. For 1173031/1173031 co-relation queries the response was YES. Maximal size of possible extension queue 21877. Compared 3000155 event pairs, 64967 based on Foata normal form. 18824/389225 useless extension candidates. Maximal degree in co-relation 1670351. Up to 340086 conditions per place. [2023-08-26 12:05:34,100 INFO L140 encePairwiseOnDemand]: 195/197 looper letters, 147 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2023-08-26 12:05:34,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 158 transitions, 1760 flow [2023-08-26 12:05:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:05:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:05:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-08-26 12:05:34,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48392554991539766 [2023-08-26 12:05:34,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-08-26 12:05:34,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-08-26 12:05:34,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:05:34,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-08-26 12:05:34,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:05:34,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:05:34,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:05:34,103 INFO L175 Difference]: Start difference. First operand has 60 places, 107 transitions, 1023 flow. Second operand 3 states and 286 transitions. [2023-08-26 12:05:34,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 158 transitions, 1760 flow Received shutdown request... [2023-08-26 12:05:45,907 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 12:05:46,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-26 12:05:48,891 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 12:05:48,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-08-26 12:05:48,891 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 12:05:48,891 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (9 of 11 remaining) [2023-08-26 12:05:48,891 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 11 remaining) [2023-08-26 12:05:48,892 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 11 remaining) [2023-08-26 12:05:48,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:05:48,894 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 7 thread instances [2023-08-26 12:05:48,895 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:05:48,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:05:48 BasicIcfg [2023-08-26 12:05:48,902 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:05:48,903 INFO L158 Benchmark]: Toolchain (without parser) took 657307.66ms. Allocated memory was 354.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 313.6MB in the beginning and 8.8GB in the end (delta: -8.5GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-08-26 12:05:48,903 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory was 332.4MB in the beginning and 332.3MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:05:48,903 INFO L158 Benchmark]: CACSL2BoogieTranslator took 467.94ms. Allocated memory is still 354.4MB. Free memory was 312.6MB in the beginning and 293.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 12:05:48,903 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.94ms. Allocated memory is still 354.4MB. Free memory was 293.7MB in the beginning and 291.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:05:48,904 INFO L158 Benchmark]: Boogie Preprocessor took 31.82ms. Allocated memory is still 354.4MB. Free memory was 291.6MB in the beginning and 290.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:05:48,904 INFO L158 Benchmark]: RCFGBuilder took 302.88ms. Allocated memory is still 354.4MB. Free memory was 290.6MB in the beginning and 275.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 12:05:48,904 INFO L158 Benchmark]: TraceAbstraction took 656442.06ms. Allocated memory was 354.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 275.9MB in the beginning and 8.8GB in the end (delta: -8.5GB). Peak memory consumption was 8.4GB. Max. memory is 16.0GB. [2023-08-26 12:05:48,905 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory was 332.4MB in the beginning and 332.3MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 467.94ms. Allocated memory is still 354.4MB. Free memory was 312.6MB in the beginning and 293.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.94ms. Allocated memory is still 354.4MB. Free memory was 293.7MB in the beginning and 291.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.82ms. Allocated memory is still 354.4MB. Free memory was 291.6MB in the beginning and 290.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 302.88ms. Allocated memory is still 354.4MB. Free memory was 290.6MB in the beginning and 275.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 656442.06ms. Allocated memory was 354.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 275.9MB in the beginning and 8.8GB in the end (delta: -8.5GB). Peak memory consumption was 8.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 266]: Unsoundness Warning unspecified type, defaulting to int C: short [266] - GenericResultAtLocation [Line: 266]: Unsoundness Warning unspecified type, defaulting to int C: short [266] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 44 PlacesBefore, 13 PlacesAfterwards, 42 TransitionsBefore, 10 TransitionsAfterwards, 330 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 41 TotalNumberOfCompositions, 305 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 305, independent: 305, independent conditional: 0, independent unconditional: 305, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 162, independent: 162, independent conditional: 0, independent unconditional: 162, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 305, independent: 143, independent conditional: 0, independent unconditional: 143, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 162, unknown conditional: 0, unknown unconditional: 162] , Statistics on independence cache: Total cache size (in pairs): 2, Positive cache size: 2, Positive conditional cache size: 0, Positive unconditional cache size: 2, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 58 PlacesBefore, 21 PlacesAfterwards, 54 TransitionsBefore, 16 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 4 FixpointIterations, 14 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 43 TotalNumberOfCompositions, 1089 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 939, independent: 913, independent conditional: 0, independent unconditional: 913, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 482, independent: 471, independent conditional: 0, independent unconditional: 471, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 939, independent: 442, independent conditional: 0, independent unconditional: 442, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 482, unknown conditional: 0, unknown unconditional: 482] , Statistics on independence cache: Total cache size (in pairs): 42, Positive cache size: 38, Positive conditional cache size: 0, Positive unconditional cache size: 38, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 72 PlacesBefore, 27 PlacesAfterwards, 66 TransitionsBefore, 20 TransitionsAfterwards, 1782 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 51 TotalNumberOfCompositions, 2669 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1853, independent: 1797, independent conditional: 0, independent unconditional: 1797, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 920, independent: 900, independent conditional: 0, independent unconditional: 900, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1853, independent: 897, independent conditional: 0, independent unconditional: 897, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 920, unknown conditional: 0, unknown unconditional: 920] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 57, Positive conditional cache size: 0, Positive unconditional cache size: 57, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 86 PlacesBefore, 33 PlacesAfterwards, 78 TransitionsBefore, 24 TransitionsAfterwards, 2904 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 59 TotalNumberOfCompositions, 4751 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3128, independent: 3041, independent conditional: 0, independent unconditional: 3041, dependent: 87, dependent conditional: 0, dependent unconditional: 87, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1493, independent: 1453, independent conditional: 0, independent unconditional: 1453, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3128, independent: 1588, independent conditional: 0, independent unconditional: 1588, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 1493, unknown conditional: 0, unknown unconditional: 1493] , Statistics on independence cache: Total cache size (in pairs): 102, Positive cache size: 91, Positive conditional cache size: 0, Positive unconditional cache size: 91, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 100 PlacesBefore, 39 PlacesAfterwards, 90 TransitionsBefore, 28 TransitionsAfterwards, 4290 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 67 TotalNumberOfCompositions, 6792 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4333, independent: 4232, independent conditional: 0, independent unconditional: 4232, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2159, independent: 2118, independent conditional: 0, independent unconditional: 2118, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4333, independent: 2114, independent conditional: 0, independent unconditional: 2114, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 2159, unknown conditional: 0, unknown unconditional: 2159] , Statistics on independence cache: Total cache size (in pairs): 146, Positive cache size: 132, Positive conditional cache size: 0, Positive unconditional cache size: 132, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 114 PlacesBefore, 45 PlacesAfterwards, 102 TransitionsBefore, 32 TransitionsAfterwards, 5940 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 75 TotalNumberOfCompositions, 8869 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6042, independent: 5930, independent conditional: 0, independent unconditional: 5930, dependent: 112, dependent conditional: 0, dependent unconditional: 112, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2994, independent: 2948, independent conditional: 0, independent unconditional: 2948, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6042, independent: 2982, independent conditional: 0, independent unconditional: 2982, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 2994, unknown conditional: 0, unknown unconditional: 2994] , Statistics on independence cache: Total cache size (in pairs): 177, Positive cache size: 160, Positive conditional cache size: 0, Positive unconditional cache size: 160, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 128 PlacesBefore, 51 PlacesAfterwards, 114 TransitionsBefore, 36 TransitionsAfterwards, 7854 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 83 TotalNumberOfCompositions, 13499 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7857, independent: 7705, independent conditional: 0, independent unconditional: 7705, dependent: 152, dependent conditional: 0, dependent unconditional: 152, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3893, independent: 3839, independent conditional: 0, independent unconditional: 3839, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7857, independent: 3866, independent conditional: 0, independent unconditional: 3866, dependent: 98, dependent conditional: 0, dependent unconditional: 98, unknown: 3893, unknown conditional: 0, unknown unconditional: 3893] , Statistics on independence cache: Total cache size (in pairs): 251, Positive cache size: 231, Positive conditional cache size: 0, Positive unconditional cache size: 231, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 718]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 17 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 66 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.9s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 45 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 114 IncrementalHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 114 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=4, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 61 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.4s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 87 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 87 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 246 IncrementalHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 0 mSDtfsCounter, 246 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=7, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 22/22 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 90 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.0s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 143 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 143 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 424 IncrementalHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 0 mSDtfsCounter, 424 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=462occurred in iteration=9, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 138 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 58/58 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 102 locations, 9 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 20.1s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 18.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 213 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 213 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 651 IncrementalHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 0 mSDtfsCounter, 651 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1213occurred in iteration=11, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 175 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 122/122 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 6 thread instances CFG has 8 procedures, 114 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 112.4s, OverallIterations: 15, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 110.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 297 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 297 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 927 IncrementalHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 0 mSDtfsCounter, 927 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3180occurred in iteration=13, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 221 NumberOfCodeBlocks, 221 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 230 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 222/222 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 7 thread instances CFG has 9 procedures, 126 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 512.6s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 510.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 287 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 287 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 796 IncrementalHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 0 mSDtfsCounter, 796 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1023occurred in iteration=9, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 148 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 58/58 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown