/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:24:04,435 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:24:04,514 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:24:04,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:24:04,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:24:04,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:24:04,521 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:24:04,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:24:04,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:24:04,549 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:24:04,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:24:04,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:24:04,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:24:04,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:24:04,551 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:24:04,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:24:04,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:24:04,552 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:24:04,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:24:04,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:24:04,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:24:04,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:24:04,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:24:04,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:24:04,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:24:04,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:24:04,554 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:24:04,555 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:24:04,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:24:04,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:24:04,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:24:04,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:24:04,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:24:04,557 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:24:04,557 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:24:04,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:24:04,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:24:04,559 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:24:04,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:24:04,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:24:04,559 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:24:04,559 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:24:04,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:24:04,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:24:04,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:24:04,821 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:24:04,822 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:24:04,823 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i [2023-08-04 04:24:06,047 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:24:06,311 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:24:06,312 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i [2023-08-04 04:24:06,334 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba5d80d2/a8a7601cff6f4395915d8fc7cda0e233/FLAGe3ad68785 [2023-08-04 04:24:06,348 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba5d80d2/a8a7601cff6f4395915d8fc7cda0e233 [2023-08-04 04:24:06,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:24:06,351 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:24:06,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:24:06,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:24:06,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:24:06,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12cdf401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06, skipping insertion in model container [2023-08-04 04:24:06,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,419 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:24:06,691 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i[30553,30566] [2023-08-04 04:24:06,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:24:06,710 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:24:06,736 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-04 04:24:06,738 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-04 04:24:06,751 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i[30553,30566] [2023-08-04 04:24:06,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:24:06,788 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:24:06,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06 WrapperNode [2023-08-04 04:24:06,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:24:06,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:24:06,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:24:06,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:24:06,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,828 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 130 [2023-08-04 04:24:06,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:24:06,830 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:24:06,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:24:06,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:24:06,837 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,840 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,845 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,848 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,851 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:24:06,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:24:06,855 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:24:06,855 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:24:06,856 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (1/1) ... [2023-08-04 04:24:06,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:24:06,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:06,887 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) [2023-08-04 04:24:06,924 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 [2023-08-04 04:24:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:24:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-04 04:24:06,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-04 04:24:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-04 04:24:06,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-04 04:24:06,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:24:06,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:24:06,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:24:06,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:24:06,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:24:06,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:24:06,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:24:06,948 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 04:24:07,118 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:24:07,122 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:24:07,322 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:24:07,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:24:07,476 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 04:24:07,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:24:07 BoogieIcfgContainer [2023-08-04 04:24:07,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:24:07,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:24:07,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:24:07,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:24:07,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:24:06" (1/3) ... [2023-08-04 04:24:07,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb38932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:24:07, skipping insertion in model container [2023-08-04 04:24:07,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:24:06" (2/3) ... [2023-08-04 04:24:07,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb38932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:24:07, skipping insertion in model container [2023-08-04 04:24:07,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:24:07" (3/3) ... [2023-08-04 04:24:07,486 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_35_double_lock_p3_vs_bound2.i [2023-08-04 04:24:07,494 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:24:07,503 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:24:07,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:24:07,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:24:07,560 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:24:07,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 170 flow [2023-08-04 04:24:07,635 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-08-04 04:24:07,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:07,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 89 events. 6/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 04:24:07,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 170 flow [2023-08-04 04:24:07,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:07,655 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:24:07,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:07,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:07,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:07,702 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-08-04 04:24:07,702 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:07,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 89 events. 6/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 04:24:07,705 INFO L119 LiptonReduction]: Number of co-enabled transitions 2086 [2023-08-04 04:24:09,713 INFO L134 LiptonReduction]: Checked pairs total: 3860 [2023-08-04 04:24:09,713 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-04 04:24:09,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:24:09,744 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=true, 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;@6e63c252, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:24:09,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:24:09,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:24:09,753 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-04 04:24:09,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:09,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:09,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:24:09,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:09,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash 471381563, now seen corresponding path program 1 times [2023-08-04 04:24:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:09,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764034674] [2023-08-04 04:24:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:10,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764034674] [2023-08-04 04:24:10,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764034674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:10,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:10,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 04:24:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733571397] [2023-08-04 04:24:10,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:10,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:24:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:24:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:24:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 143 [2023-08-04 04:24:10,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:10,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 143 [2023-08-04 04:24:10,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:10,207 INFO L124 PetriNetUnfolderBase]: 255/423 cut-off events. [2023-08-04 04:24:10,207 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:24:10,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 423 events. 255/423 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1632 event pairs, 71 based on Foata normal form. 16/385 useless extension candidates. Maximal degree in co-relation 846. Up to 305 conditions per place. [2023-08-04 04:24:10,212 INFO L140 encePairwiseOnDemand]: 138/143 looper letters, 21 selfloop transitions, 2 changer transitions 1/27 dead transitions. [2023-08-04 04:24:10,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 110 flow [2023-08-04 04:24:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:24:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:24:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-04 04:24:10,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49417249417249415 [2023-08-04 04:24:10,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-04 04:24:10,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-04 04:24:10,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:10,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-04 04:24:10,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,241 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 58 flow. Second operand 3 states and 212 transitions. [2023-08-04 04:24:10,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 110 flow [2023-08-04 04:24:10,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:10,246 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 57 flow [2023-08-04 04:24:10,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=57, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-04 04:24:10,251 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-08-04 04:24:10,251 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 57 flow [2023-08-04 04:24:10,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:10,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:10,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:24:10,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:10,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash -331863046, now seen corresponding path program 1 times [2023-08-04 04:24:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:10,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432308324] [2023-08-04 04:24:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:10,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:10,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432308324] [2023-08-04 04:24:10,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432308324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:10,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:10,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:24:10,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9076923] [2023-08-04 04:24:10,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:10,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:10,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:10,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-08-04 04:24:10,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 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) [2023-08-04 04:24:10,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:10,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-08-04 04:24:10,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:10,510 INFO L124 PetriNetUnfolderBase]: 227/375 cut-off events. [2023-08-04 04:24:10,511 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 04:24:10,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 375 events. 227/375 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1390 event pairs, 33 based on Foata normal form. 4/341 useless extension candidates. Maximal degree in co-relation 798. Up to 261 conditions per place. [2023-08-04 04:24:10,513 INFO L140 encePairwiseOnDemand]: 138/143 looper letters, 29 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-08-04 04:24:10,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 153 flow [2023-08-04 04:24:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:24:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:24:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 324 transitions. [2023-08-04 04:24:10,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45314685314685316 [2023-08-04 04:24:10,517 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 324 transitions. [2023-08-04 04:24:10,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 324 transitions. [2023-08-04 04:24:10,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:10,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 324 transitions. [2023-08-04 04:24:10,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,521 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,521 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 57 flow. Second operand 5 states and 324 transitions. [2023-08-04 04:24:10,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 153 flow [2023-08-04 04:24:10,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 36 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:24:10,523 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 65 flow [2023-08-04 04:24:10,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2023-08-04 04:24:10,524 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2023-08-04 04:24:10,524 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 65 flow [2023-08-04 04:24:10,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 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) [2023-08-04 04:24:10,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:10,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:10,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 04:24:10,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:10,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:10,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1697819869, now seen corresponding path program 1 times [2023-08-04 04:24:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:10,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839733784] [2023-08-04 04:24:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:10,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:10,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:10,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839733784] [2023-08-04 04:24:10,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839733784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:10,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:24:10,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546149153] [2023-08-04 04:24:10,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:24:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:24:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:24:10,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-08-04 04:24:10,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 65 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:10,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-08-04 04:24:10,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:10,771 INFO L124 PetriNetUnfolderBase]: 206/342 cut-off events. [2023-08-04 04:24:10,772 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-04 04:24:10,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 342 events. 206/342 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1245 event pairs, 21 based on Foata normal form. 12/319 useless extension candidates. Maximal degree in co-relation 768. Up to 129 conditions per place. [2023-08-04 04:24:10,775 INFO L140 encePairwiseOnDemand]: 137/143 looper letters, 33 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-08-04 04:24:10,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 181 flow [2023-08-04 04:24:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:24:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:24:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2023-08-04 04:24:10,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45104895104895104 [2023-08-04 04:24:10,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 387 transitions. [2023-08-04 04:24:10,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 387 transitions. [2023-08-04 04:24:10,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:10,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 387 transitions. [2023-08-04 04:24:10,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,782 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,782 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 65 flow. Second operand 6 states and 387 transitions. [2023-08-04 04:24:10,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 181 flow [2023-08-04 04:24:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 173 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 04:24:10,784 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 71 flow [2023-08-04 04:24:10,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2023-08-04 04:24:10,785 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-08-04 04:24:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 71 flow [2023-08-04 04:24:10,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:10,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:24:10,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:10,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:10,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2078237132, now seen corresponding path program 1 times [2023-08-04 04:24:10,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:10,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492874886] [2023-08-04 04:24:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:10,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:10,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:10,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492874886] [2023-08-04 04:24:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492874886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:10,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:10,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:24:10,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813124090] [2023-08-04 04:24:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:10,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:24:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:24:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:24:10,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 143 [2023-08-04 04:24:10,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:10,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 143 [2023-08-04 04:24:10,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:11,086 INFO L124 PetriNetUnfolderBase]: 292/488 cut-off events. [2023-08-04 04:24:11,087 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-08-04 04:24:11,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 488 events. 292/488 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1706 event pairs, 24 based on Foata normal form. 12/451 useless extension candidates. Maximal degree in co-relation 1115. Up to 132 conditions per place. [2023-08-04 04:24:11,090 INFO L140 encePairwiseOnDemand]: 135/143 looper letters, 42 selfloop transitions, 6 changer transitions 2/52 dead transitions. [2023-08-04 04:24:11,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 233 flow [2023-08-04 04:24:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:24:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:24:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 450 transitions. [2023-08-04 04:24:11,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44955044955044954 [2023-08-04 04:24:11,093 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 450 transitions. [2023-08-04 04:24:11,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 450 transitions. [2023-08-04 04:24:11,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:11,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 450 transitions. [2023-08-04 04:24:11,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,097 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,097 INFO L175 Difference]: Start difference. First operand has 33 places, 21 transitions, 71 flow. Second operand 7 states and 450 transitions. [2023-08-04 04:24:11,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 233 flow [2023-08-04 04:24:11,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 52 transitions, 223 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 04:24:11,100 INFO L231 Difference]: Finished difference. Result has 36 places, 21 transitions, 81 flow [2023-08-04 04:24:11,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=21} [2023-08-04 04:24:11,101 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2023-08-04 04:24:11,101 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 21 transitions, 81 flow [2023-08-04 04:24:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:11,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:11,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:24:11,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:11,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash 840625, now seen corresponding path program 1 times [2023-08-04 04:24:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:11,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529211575] [2023-08-04 04:24:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:11,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:11,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:11,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529211575] [2023-08-04 04:24:11,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529211575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:11,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:11,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:24:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85895357] [2023-08-04 04:24:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:11,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:24:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:24:11,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:24:11,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 143 [2023-08-04 04:24:11,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 21 transitions, 81 flow. Second operand has 7 states, 7 states have (on average 58.0) internal successors, (406), 7 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:11,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 143 [2023-08-04 04:24:11,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:11,413 INFO L124 PetriNetUnfolderBase]: 195/327 cut-off events. [2023-08-04 04:24:11,413 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-04 04:24:11,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 327 events. 195/327 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1168 event pairs, 13 based on Foata normal form. 8/297 useless extension candidates. Maximal degree in co-relation 771. Up to 139 conditions per place. [2023-08-04 04:24:11,414 INFO L140 encePairwiseOnDemand]: 135/143 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-04 04:24:11,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 205 flow [2023-08-04 04:24:11,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 04:24:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 04:24:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 492 transitions. [2023-08-04 04:24:11,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43006993006993005 [2023-08-04 04:24:11,417 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 492 transitions. [2023-08-04 04:24:11,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 492 transitions. [2023-08-04 04:24:11,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:11,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 492 transitions. [2023-08-04 04:24:11,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 61.5) internal successors, (492), 8 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 143.0) internal successors, (1287), 9 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,420 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 143.0) internal successors, (1287), 9 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,420 INFO L175 Difference]: Start difference. First operand has 36 places, 21 transitions, 81 flow. Second operand 8 states and 492 transitions. [2023-08-04 04:24:11,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 205 flow [2023-08-04 04:24:11,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-04 04:24:11,424 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-08-04 04:24:11,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-08-04 04:24:11,426 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2023-08-04 04:24:11,426 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-08-04 04:24:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.0) internal successors, (406), 7 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-04 04:24:11,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-04 04:24:11,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 04:24:11,429 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 04:24:11,431 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-04 04:24:11,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 170 flow [2023-08-04 04:24:11,451 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-08-04 04:24:11,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:11,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 89 events. 6/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 04:24:11,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 170 flow [2023-08-04 04:24:11,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:11,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:24:11,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:11,455 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:11,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 166 flow [2023-08-04 04:24:11,461 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-08-04 04:24:11,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:11,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 89 events. 6/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 04:24:11,463 INFO L119 LiptonReduction]: Number of co-enabled transitions 2086 [2023-08-04 04:24:13,124 INFO L134 LiptonReduction]: Checked pairs total: 3814 [2023-08-04 04:24:13,124 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-04 04:24:13,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:24:13,127 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=true, 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;@6e63c252, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:24:13,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:24:13,130 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:24:13,130 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-08-04 04:24:13,130 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:13,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:13,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:13,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:24:13,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash 308316075, now seen corresponding path program 1 times [2023-08-04 04:24:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:13,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821413353] [2023-08-04 04:24:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:24:13,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:24:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:24:13,166 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:24:13,167 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:24:13,167 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 04:24:13,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 04:24:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 04:24:13,167 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:24:13,168 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 04:24:13,169 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:24:13,169 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:24:13,202 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:24:13,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 122 transitions, 268 flow [2023-08-04 04:24:13,227 INFO L124 PetriNetUnfolderBase]: 8/132 cut-off events. [2023-08-04 04:24:13,227 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:13,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 132 events. 8/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 237 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2023-08-04 04:24:13,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 122 transitions, 268 flow [2023-08-04 04:24:13,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 107 transitions, 229 flow [2023-08-04 04:24:13,229 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:24:13,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 107 transitions, 229 flow [2023-08-04 04:24:13,230 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 107 transitions, 229 flow [2023-08-04 04:24:13,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-04 04:24:13,242 INFO L124 PetriNetUnfolderBase]: 8/132 cut-off events. [2023-08-04 04:24:13,242 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:13,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 132 events. 8/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 120. Up to 6 conditions per place. [2023-08-04 04:24:13,246 INFO L119 LiptonReduction]: Number of co-enabled transitions 5190 [2023-08-04 04:24:15,240 INFO L134 LiptonReduction]: Checked pairs total: 12437 [2023-08-04 04:24:15,240 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-04 04:24:15,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:24:15,245 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=true, 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;@6e63c252, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:24:15,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 04:24:15,247 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:24:15,247 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-04 04:24:15,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:15,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:15,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:24:15,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:15,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 760091606, now seen corresponding path program 1 times [2023-08-04 04:24:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285814839] [2023-08-04 04:24:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:15,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:15,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285814839] [2023-08-04 04:24:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285814839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:15,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:15,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 04:24:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924424177] [2023-08-04 04:24:15,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:15,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:24:15,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:24:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:24:15,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2023-08-04 04:24:15,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:15,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:15,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2023-08-04 04:24:15,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:16,146 INFO L124 PetriNetUnfolderBase]: 6558/9498 cut-off events. [2023-08-04 04:24:16,146 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-04 04:24:16,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18739 conditions, 9498 events. 6558/9498 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 50663 event pairs, 1732 based on Foata normal form. 0/7967 useless extension candidates. Maximal degree in co-relation 18728. Up to 8443 conditions per place. [2023-08-04 04:24:16,199 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 43 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-04 04:24:16,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 220 flow [2023-08-04 04:24:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:24:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:24:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 04:24:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168350168350169 [2023-08-04 04:24:16,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 04:24:16,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 04:24:16,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:16,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 04:24:16,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:16,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:16,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:16,205 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 307 transitions. [2023-08-04 04:24:16,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 220 flow [2023-08-04 04:24:16,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:16,207 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 113 flow [2023-08-04 04:24:16,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-04 04:24:16,209 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-08-04 04:24:16,209 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 113 flow [2023-08-04 04:24:16,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:16,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:16,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:16,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 04:24:16,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:16,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1231782910, now seen corresponding path program 1 times [2023-08-04 04:24:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:16,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042196803] [2023-08-04 04:24:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:16,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042196803] [2023-08-04 04:24:16,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042196803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:16,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:16,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:24:16,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211832645] [2023-08-04 04:24:16,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:16,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2023-08-04 04:24:16,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:16,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:16,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2023-08-04 04:24:16,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:17,325 INFO L124 PetriNetUnfolderBase]: 8957/12849 cut-off events. [2023-08-04 04:24:17,325 INFO L125 PetriNetUnfolderBase]: For 1162/1162 co-relation queries the response was YES. [2023-08-04 04:24:17,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26733 conditions, 12849 events. 8957/12849 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 71567 event pairs, 1804 based on Foata normal form. 96/11595 useless extension candidates. Maximal degree in co-relation 26720. Up to 9058 conditions per place. [2023-08-04 04:24:17,412 INFO L140 encePairwiseOnDemand]: 188/198 looper letters, 96 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2023-08-04 04:24:17,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 120 transitions, 524 flow [2023-08-04 04:24:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:24:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:24:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 696 transitions. [2023-08-04 04:24:17,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021645021645021 [2023-08-04 04:24:17,416 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 696 transitions. [2023-08-04 04:24:17,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 696 transitions. [2023-08-04 04:24:17,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:17,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 696 transitions. [2023-08-04 04:24:17,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.42857142857143) internal successors, (696), 7 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:17,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:17,423 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:17,424 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 113 flow. Second operand 7 states and 696 transitions. [2023-08-04 04:24:17,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 120 transitions, 524 flow [2023-08-04 04:24:17,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 120 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:17,428 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 229 flow [2023-08-04 04:24:17,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=229, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-04 04:24:17,429 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2023-08-04 04:24:17,429 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 229 flow [2023-08-04 04:24:17,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:17,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:17,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:17,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 04:24:17,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:17,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:17,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1667604287, now seen corresponding path program 1 times [2023-08-04 04:24:17,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:17,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091483618] [2023-08-04 04:24:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:17,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:17,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:17,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091483618] [2023-08-04 04:24:17,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091483618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:17,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:17,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:24:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131482827] [2023-08-04 04:24:17,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:17,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:24:17,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:24:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:24:17,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-08-04 04:24:17,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:17,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:17,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-08-04 04:24:17,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:18,924 INFO L124 PetriNetUnfolderBase]: 10647/15407 cut-off events. [2023-08-04 04:24:18,925 INFO L125 PetriNetUnfolderBase]: For 7613/7725 co-relation queries the response was YES. [2023-08-04 04:24:18,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37889 conditions, 15407 events. 10647/15407 cut-off events. For 7613/7725 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 90091 event pairs, 1308 based on Foata normal form. 216/14130 useless extension candidates. Maximal degree in co-relation 37871. Up to 8520 conditions per place. [2023-08-04 04:24:19,040 INFO L140 encePairwiseOnDemand]: 187/198 looper letters, 127 selfloop transitions, 23 changer transitions 0/157 dead transitions. [2023-08-04 04:24:19,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 157 transitions, 808 flow [2023-08-04 04:24:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 04:24:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 04:24:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 880 transitions. [2023-08-04 04:24:19,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2023-08-04 04:24:19,043 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 880 transitions. [2023-08-04 04:24:19,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 880 transitions. [2023-08-04 04:24:19,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:19,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 880 transitions. [2023-08-04 04:24:19,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,050 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,050 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 229 flow. Second operand 9 states and 880 transitions. [2023-08-04 04:24:19,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 157 transitions, 808 flow [2023-08-04 04:24:19,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 157 transitions, 800 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:19,078 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 323 flow [2023-08-04 04:24:19,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=323, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-04 04:24:19,080 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2023-08-04 04:24:19,080 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 323 flow [2023-08-04 04:24:19,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:19,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:19,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:24:19,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:19,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -375855158, now seen corresponding path program 1 times [2023-08-04 04:24:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:19,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534415546] [2023-08-04 04:24:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534415546] [2023-08-04 04:24:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534415546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:19,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:24:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774733368] [2023-08-04 04:24:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:19,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:19,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2023-08-04 04:24:19,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 323 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:19,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2023-08-04 04:24:19,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:20,552 INFO L124 PetriNetUnfolderBase]: 12075/17383 cut-off events. [2023-08-04 04:24:20,552 INFO L125 PetriNetUnfolderBase]: For 15129/15397 co-relation queries the response was YES. [2023-08-04 04:24:20,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46972 conditions, 17383 events. 12075/17383 cut-off events. For 15129/15397 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 103230 event pairs, 2144 based on Foata normal form. 96/15838 useless extension candidates. Maximal degree in co-relation 46951. Up to 13545 conditions per place. [2023-08-04 04:24:20,663 INFO L140 encePairwiseOnDemand]: 188/198 looper letters, 111 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2023-08-04 04:24:20,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 144 transitions, 888 flow [2023-08-04 04:24:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:24:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:24:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 690 transitions. [2023-08-04 04:24:20,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2023-08-04 04:24:20,665 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 690 transitions. [2023-08-04 04:24:20,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 690 transitions. [2023-08-04 04:24:20,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:20,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 690 transitions. [2023-08-04 04:24:20,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.57142857142857) internal successors, (690), 7 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:20,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:20,670 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:20,670 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 323 flow. Second operand 7 states and 690 transitions. [2023-08-04 04:24:20,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 144 transitions, 888 flow [2023-08-04 04:24:20,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 144 transitions, 816 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-04 04:24:20,728 INFO L231 Difference]: Finished difference. Result has 70 places, 84 transitions, 508 flow [2023-08-04 04:24:20,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=508, PETRI_PLACES=70, PETRI_TRANSITIONS=84} [2023-08-04 04:24:20,730 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2023-08-04 04:24:20,730 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 84 transitions, 508 flow [2023-08-04 04:24:20,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:20,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:20,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:20,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 04:24:20,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:20,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash -419539247, now seen corresponding path program 1 times [2023-08-04 04:24:20,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:20,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142202090] [2023-08-04 04:24:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:20,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:20,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142202090] [2023-08-04 04:24:20,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142202090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:20,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:20,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:24:20,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430754327] [2023-08-04 04:24:20,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:20,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:24:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:24:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:24:20,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-08-04 04:24:20,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 84 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:20,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:20,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-08-04 04:24:20,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:22,539 INFO L124 PetriNetUnfolderBase]: 13990/20290 cut-off events. [2023-08-04 04:24:22,540 INFO L125 PetriNetUnfolderBase]: For 28665/28729 co-relation queries the response was YES. [2023-08-04 04:24:22,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58794 conditions, 20290 events. 13990/20290 cut-off events. For 28665/28729 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 125007 event pairs, 2008 based on Foata normal form. 220/18712 useless extension candidates. Maximal degree in co-relation 58769. Up to 13004 conditions per place. [2023-08-04 04:24:22,648 INFO L140 encePairwiseOnDemand]: 187/198 looper letters, 143 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2023-08-04 04:24:22,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 187 transitions, 1239 flow [2023-08-04 04:24:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 04:24:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 04:24:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 871 transitions. [2023-08-04 04:24:22,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887766554433221 [2023-08-04 04:24:22,651 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 871 transitions. [2023-08-04 04:24:22,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 871 transitions. [2023-08-04 04:24:22,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:22,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 871 transitions. [2023-08-04 04:24:22,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.77777777777777) internal successors, (871), 9 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,657 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,657 INFO L175 Difference]: Start difference. First operand has 70 places, 84 transitions, 508 flow. Second operand 9 states and 871 transitions. [2023-08-04 04:24:22,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 187 transitions, 1239 flow [2023-08-04 04:24:22,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 187 transitions, 1213 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-04 04:24:22,943 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 687 flow [2023-08-04 04:24:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=687, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2023-08-04 04:24:22,944 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 33 predicate places. [2023-08-04 04:24:22,944 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 687 flow [2023-08-04 04:24:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:22,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 04:24:22,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:22,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -357505754, now seen corresponding path program 1 times [2023-08-04 04:24:22,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:22,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296808109] [2023-08-04 04:24:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296808109] [2023-08-04 04:24:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296808109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:23,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 04:24:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131682688] [2023-08-04 04:24:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 04:24:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 04:24:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:24:23,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 198 [2023-08-04 04:24:23,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:23,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:23,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 198 [2023-08-04 04:24:23,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:26,197 INFO L124 PetriNetUnfolderBase]: 23595/33455 cut-off events. [2023-08-04 04:24:26,198 INFO L125 PetriNetUnfolderBase]: For 82212/82480 co-relation queries the response was YES. [2023-08-04 04:24:26,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103567 conditions, 33455 events. 23595/33455 cut-off events. For 82212/82480 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 210471 event pairs, 1368 based on Foata normal form. 808/31421 useless extension candidates. Maximal degree in co-relation 103538. Up to 13810 conditions per place. [2023-08-04 04:24:26,413 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 242 selfloop transitions, 103 changer transitions 0/352 dead transitions. [2023-08-04 04:24:26,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 352 transitions, 2655 flow [2023-08-04 04:24:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:24:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:24:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1421 transitions. [2023-08-04 04:24:26,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47845117845117846 [2023-08-04 04:24:26,417 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1421 transitions. [2023-08-04 04:24:26,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1421 transitions. [2023-08-04 04:24:26,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:26,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1421 transitions. [2023-08-04 04:24:26,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 94.73333333333333) internal successors, (1421), 15 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:26,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:26,426 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:26,426 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 687 flow. Second operand 15 states and 1421 transitions. [2023-08-04 04:24:26,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 352 transitions, 2655 flow [2023-08-04 04:24:27,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 352 transitions, 2415 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-04 04:24:27,196 INFO L231 Difference]: Finished difference. Result has 97 places, 162 transitions, 1578 flow [2023-08-04 04:24:27,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1578, PETRI_PLACES=97, PETRI_TRANSITIONS=162} [2023-08-04 04:24:27,196 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 50 predicate places. [2023-08-04 04:24:27,197 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 162 transitions, 1578 flow [2023-08-04 04:24:27,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:27,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:27,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:27,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 04:24:27,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:27,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:27,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2136453746, now seen corresponding path program 1 times [2023-08-04 04:24:27,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:27,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634032059] [2023-08-04 04:24:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:27,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:27,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634032059] [2023-08-04 04:24:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634032059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:27,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:24:27,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768460627] [2023-08-04 04:24:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:27,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:24:27,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:24:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:24:27,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-08-04 04:24:27,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 162 transitions, 1578 flow. Second operand has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:27,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:27,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-08-04 04:24:27,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:30,788 INFO L124 PetriNetUnfolderBase]: 24083/34755 cut-off events. [2023-08-04 04:24:30,788 INFO L125 PetriNetUnfolderBase]: For 154700/155432 co-relation queries the response was YES. [2023-08-04 04:24:30,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128916 conditions, 34755 events. 24083/34755 cut-off events. For 154700/155432 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 227093 event pairs, 4060 based on Foata normal form. 172/32013 useless extension candidates. Maximal degree in co-relation 128878. Up to 25927 conditions per place. [2023-08-04 04:24:31,011 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 254 selfloop transitions, 71 changer transitions 0/332 dead transitions. [2023-08-04 04:24:31,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 332 transitions, 3264 flow [2023-08-04 04:24:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 04:24:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 04:24:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1314 transitions. [2023-08-04 04:24:31,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2023-08-04 04:24:31,015 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1314 transitions. [2023-08-04 04:24:31,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1314 transitions. [2023-08-04 04:24:31,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:31,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1314 transitions. [2023-08-04 04:24:31,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.85714285714286) internal successors, (1314), 14 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:31,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:31,023 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:31,023 INFO L175 Difference]: Start difference. First operand has 97 places, 162 transitions, 1578 flow. Second operand 14 states and 1314 transitions. [2023-08-04 04:24:31,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 332 transitions, 3264 flow [2023-08-04 04:24:32,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 332 transitions, 3000 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-08-04 04:24:32,200 INFO L231 Difference]: Finished difference. Result has 108 places, 201 transitions, 2040 flow [2023-08-04 04:24:32,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2040, PETRI_PLACES=108, PETRI_TRANSITIONS=201} [2023-08-04 04:24:32,201 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 61 predicate places. [2023-08-04 04:24:32,201 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 201 transitions, 2040 flow [2023-08-04 04:24:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:32,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:32,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:32,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 04:24:32,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:32,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:32,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2110741106, now seen corresponding path program 2 times [2023-08-04 04:24:32,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:32,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403071999] [2023-08-04 04:24:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:32,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:32,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:32,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403071999] [2023-08-04 04:24:32,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403071999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:32,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:32,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:24:32,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067592344] [2023-08-04 04:24:32,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:32,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:24:32,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:32,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:24:32,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:24:32,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-08-04 04:24:32,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 201 transitions, 2040 flow. Second operand has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:32,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:32,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-08-04 04:24:32,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:36,316 INFO L124 PetriNetUnfolderBase]: 26180/37440 cut-off events. [2023-08-04 04:24:36,316 INFO L125 PetriNetUnfolderBase]: For 195500/196632 co-relation queries the response was YES. [2023-08-04 04:24:36,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144316 conditions, 37440 events. 26180/37440 cut-off events. For 195500/196632 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 245122 event pairs, 4244 based on Foata normal form. 240/34547 useless extension candidates. Maximal degree in co-relation 144272. Up to 28044 conditions per place. [2023-08-04 04:24:36,626 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 287 selfloop transitions, 81 changer transitions 0/375 dead transitions. [2023-08-04 04:24:36,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 375 transitions, 3826 flow [2023-08-04 04:24:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 04:24:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 04:24:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1311 transitions. [2023-08-04 04:24:36,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47294372294372294 [2023-08-04 04:24:36,631 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1311 transitions. [2023-08-04 04:24:36,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1311 transitions. [2023-08-04 04:24:36,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:36,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1311 transitions. [2023-08-04 04:24:36,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.64285714285714) internal successors, (1311), 14 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:36,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:36,640 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:36,640 INFO L175 Difference]: Start difference. First operand has 108 places, 201 transitions, 2040 flow. Second operand 14 states and 1311 transitions. [2023-08-04 04:24:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 375 transitions, 3826 flow [2023-08-04 04:24:38,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 375 transitions, 3589 flow, removed 97 selfloop flow, removed 5 redundant places. [2023-08-04 04:24:38,580 INFO L231 Difference]: Finished difference. Result has 121 places, 235 transitions, 2449 flow [2023-08-04 04:24:38,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2449, PETRI_PLACES=121, PETRI_TRANSITIONS=235} [2023-08-04 04:24:38,581 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 74 predicate places. [2023-08-04 04:24:38,581 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 235 transitions, 2449 flow [2023-08-04 04:24:38,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:38,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:38,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:38,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 04:24:38,582 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:38,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:38,582 INFO L85 PathProgramCache]: Analyzing trace with hash 34321476, now seen corresponding path program 1 times [2023-08-04 04:24:38,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:38,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262185163] [2023-08-04 04:24:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:38,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:38,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:38,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262185163] [2023-08-04 04:24:38,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262185163] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:38,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:38,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:24:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423622784] [2023-08-04 04:24:38,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:38,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:24:38,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:38,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:24:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:24:38,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 198 [2023-08-04 04:24:38,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 235 transitions, 2449 flow. Second operand has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:38,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:38,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 198 [2023-08-04 04:24:38,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:44,152 INFO L124 PetriNetUnfolderBase]: 32644/45992 cut-off events. [2023-08-04 04:24:44,152 INFO L125 PetriNetUnfolderBase]: For 301190/301782 co-relation queries the response was YES. [2023-08-04 04:24:44,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182583 conditions, 45992 events. 32644/45992 cut-off events. For 301190/301782 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 297067 event pairs, 2072 based on Foata normal form. 500/42733 useless extension candidates. Maximal degree in co-relation 182534. Up to 18184 conditions per place. [2023-08-04 04:24:44,737 INFO L140 encePairwiseOnDemand]: 183/198 looper letters, 311 selfloop transitions, 179 changer transitions 10/508 dead transitions. [2023-08-04 04:24:44,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 508 transitions, 5144 flow [2023-08-04 04:24:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 04:24:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 04:24:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1572 transitions. [2023-08-04 04:24:44,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46702317290552586 [2023-08-04 04:24:44,739 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1572 transitions. [2023-08-04 04:24:44,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1572 transitions. [2023-08-04 04:24:44,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:44,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1572 transitions. [2023-08-04 04:24:44,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.47058823529412) internal successors, (1572), 17 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:44,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:44,748 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:44,748 INFO L175 Difference]: Start difference. First operand has 121 places, 235 transitions, 2449 flow. Second operand 17 states and 1572 transitions. [2023-08-04 04:24:44,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 508 transitions, 5144 flow [2023-08-04 04:24:47,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 508 transitions, 4822 flow, removed 99 selfloop flow, removed 6 redundant places. [2023-08-04 04:24:47,152 INFO L231 Difference]: Finished difference. Result has 134 places, 270 transitions, 3105 flow [2023-08-04 04:24:47,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3105, PETRI_PLACES=134, PETRI_TRANSITIONS=270} [2023-08-04 04:24:47,153 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 87 predicate places. [2023-08-04 04:24:47,153 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 270 transitions, 3105 flow [2023-08-04 04:24:47,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:47,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:47,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:47,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 04:24:47,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:47,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash 213934639, now seen corresponding path program 1 times [2023-08-04 04:24:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:47,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522098467] [2023-08-04 04:24:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:47,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:47,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:47,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522098467] [2023-08-04 04:24:47,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522098467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:47,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:47,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:24:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851749930] [2023-08-04 04:24:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:47,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:24:47,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:24:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:24:47,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-04 04:24:47,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 270 transitions, 3105 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:47,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:47,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-04 04:24:47,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:53,277 INFO L124 PetriNetUnfolderBase]: 33727/48503 cut-off events. [2023-08-04 04:24:53,277 INFO L125 PetriNetUnfolderBase]: For 396842/398234 co-relation queries the response was YES. [2023-08-04 04:24:53,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207488 conditions, 48503 events. 33727/48503 cut-off events. For 396842/398234 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 329904 event pairs, 3820 based on Foata normal form. 712/45507 useless extension candidates. Maximal degree in co-relation 207436. Up to 26016 conditions per place. [2023-08-04 04:24:53,732 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 303 selfloop transitions, 197 changer transitions 0/508 dead transitions. [2023-08-04 04:24:53,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 508 transitions, 5952 flow [2023-08-04 04:24:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 04:24:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 04:24:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1565 transitions. [2023-08-04 04:24:53,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649435531788473 [2023-08-04 04:24:53,735 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1565 transitions. [2023-08-04 04:24:53,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1565 transitions. [2023-08-04 04:24:53,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:53,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1565 transitions. [2023-08-04 04:24:53,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.05882352941177) internal successors, (1565), 17 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:53,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:53,743 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:53,743 INFO L175 Difference]: Start difference. First operand has 134 places, 270 transitions, 3105 flow. Second operand 17 states and 1565 transitions. [2023-08-04 04:24:53,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 508 transitions, 5952 flow [2023-08-04 04:24:57,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 508 transitions, 5688 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-08-04 04:24:57,507 INFO L231 Difference]: Finished difference. Result has 145 places, 335 transitions, 4476 flow [2023-08-04 04:24:57,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4476, PETRI_PLACES=145, PETRI_TRANSITIONS=335} [2023-08-04 04:24:57,507 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 98 predicate places. [2023-08-04 04:24:57,507 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 335 transitions, 4476 flow [2023-08-04 04:24:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:57,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:57,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 04:24:57,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:57,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash 137697145, now seen corresponding path program 1 times [2023-08-04 04:24:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:57,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086532166] [2023-08-04 04:24:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:57,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:57,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086532166] [2023-08-04 04:24:57,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086532166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:57,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:57,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:24:57,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539195971] [2023-08-04 04:24:57,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:57,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:24:57,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:24:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:24:57,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-04 04:24:57,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 335 transitions, 4476 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:57,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:57,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-04 04:24:57,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:25:04,651 INFO L124 PetriNetUnfolderBase]: 36997/53549 cut-off events. [2023-08-04 04:25:04,651 INFO L125 PetriNetUnfolderBase]: For 560514/562394 co-relation queries the response was YES. [2023-08-04 04:25:05,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247623 conditions, 53549 events. 36997/53549 cut-off events. For 560514/562394 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 374132 event pairs, 5976 based on Foata normal form. 688/50111 useless extension candidates. Maximal degree in co-relation 247564. Up to 39418 conditions per place. [2023-08-04 04:25:05,233 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 390 selfloop transitions, 121 changer transitions 0/519 dead transitions. [2023-08-04 04:25:05,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 519 transitions, 7036 flow [2023-08-04 04:25:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:25:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:25:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1375 transitions. [2023-08-04 04:25:05,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-08-04 04:25:05,236 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1375 transitions. [2023-08-04 04:25:05,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1375 transitions. [2023-08-04 04:25:05,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:25:05,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1375 transitions. [2023-08-04 04:25:05,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.66666666666667) internal successors, (1375), 15 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:05,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:05,243 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:05,243 INFO L175 Difference]: Start difference. First operand has 145 places, 335 transitions, 4476 flow. Second operand 15 states and 1375 transitions. [2023-08-04 04:25:05,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 519 transitions, 7036 flow [2023-08-04 04:25:12,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 519 transitions, 6668 flow, removed 175 selfloop flow, removed 4 redundant places. [2023-08-04 04:25:12,332 INFO L231 Difference]: Finished difference. Result has 158 places, 367 transitions, 5137 flow [2023-08-04 04:25:12,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5137, PETRI_PLACES=158, PETRI_TRANSITIONS=367} [2023-08-04 04:25:12,333 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 111 predicate places. [2023-08-04 04:25:12,333 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 367 transitions, 5137 flow [2023-08-04 04:25:12,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:12,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:25:12,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:25:12,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 04:25:12,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:25:12,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:25:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash -662191205, now seen corresponding path program 2 times [2023-08-04 04:25:12,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:25:12,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565031030] [2023-08-04 04:25:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:25:12,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:25:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:25:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:25:12,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:25:12,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565031030] [2023-08-04 04:25:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565031030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:25:12,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:25:12,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:25:12,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130253038] [2023-08-04 04:25:12,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:25:12,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:25:12,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:25:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:25:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:25:12,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-08-04 04:25:12,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 367 transitions, 5137 flow. Second operand has 7 states, 7 states have (on average 82.28571428571429) internal successors, (576), 7 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:12,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:25:12,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-08-04 04:25:12,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:25:19,909 INFO L124 PetriNetUnfolderBase]: 38797/56289 cut-off events. [2023-08-04 04:25:19,910 INFO L125 PetriNetUnfolderBase]: For 631942/634186 co-relation queries the response was YES. [2023-08-04 04:25:20,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264842 conditions, 56289 events. 38797/56289 cut-off events. For 631942/634186 co-relation queries the response was YES. Maximal size of possible extension queue 2055. Compared 397089 event pairs, 6788 based on Foata normal form. 568/52559 useless extension candidates. Maximal degree in co-relation 264780. Up to 46472 conditions per place. [2023-08-04 04:25:20,786 INFO L140 encePairwiseOnDemand]: 185/198 looper letters, 407 selfloop transitions, 76 changer transitions 0/497 dead transitions. [2023-08-04 04:25:20,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 497 transitions, 7085 flow [2023-08-04 04:25:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 04:25:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 04:25:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2023-08-04 04:25:20,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47264309764309764 [2023-08-04 04:25:20,788 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2023-08-04 04:25:20,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2023-08-04 04:25:20,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:25:20,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2023-08-04 04:25:20,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:20,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:20,794 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:20,794 INFO L175 Difference]: Start difference. First operand has 158 places, 367 transitions, 5137 flow. Second operand 12 states and 1123 transitions. [2023-08-04 04:25:20,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 497 transitions, 7085 flow [2023-08-04 04:25:27,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 497 transitions, 6728 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-08-04 04:25:27,407 INFO L231 Difference]: Finished difference. Result has 161 places, 394 transitions, 5546 flow [2023-08-04 04:25:27,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4785, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5546, PETRI_PLACES=161, PETRI_TRANSITIONS=394} [2023-08-04 04:25:27,408 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 114 predicate places. [2023-08-04 04:25:27,408 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 394 transitions, 5546 flow [2023-08-04 04:25:27,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.28571428571429) internal successors, (576), 7 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:27,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:25:27,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:25:27,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 04:25:27,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:25:27,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:25:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1255507321, now seen corresponding path program 3 times [2023-08-04 04:25:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:25:27,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840417371] [2023-08-04 04:25:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:25:27,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:25:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:25:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:25:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:25:27,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840417371] [2023-08-04 04:25:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840417371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:25:27,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:25:27,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:25:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99760808] [2023-08-04 04:25:27,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:25:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:25:27,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:25:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:25:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:25:27,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-04 04:25:27,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 394 transitions, 5546 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:27,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:25:27,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-04 04:25:27,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:25:36,069 INFO L124 PetriNetUnfolderBase]: 43053/62197 cut-off events. [2023-08-04 04:25:36,070 INFO L125 PetriNetUnfolderBase]: For 762622/765094 co-relation queries the response was YES. [2023-08-04 04:25:36,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293677 conditions, 62197 events. 43053/62197 cut-off events. For 762622/765094 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 442903 event pairs, 6144 based on Foata normal form. 872/58379 useless extension candidates. Maximal degree in co-relation 293612. Up to 33894 conditions per place. [2023-08-04 04:25:36,979 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 388 selfloop transitions, 224 changer transitions 0/620 dead transitions. [2023-08-04 04:25:36,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 620 transitions, 8692 flow [2023-08-04 04:25:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 04:25:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 04:25:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1563 transitions. [2023-08-04 04:25:36,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464349376114082 [2023-08-04 04:25:36,982 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1563 transitions. [2023-08-04 04:25:36,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1563 transitions. [2023-08-04 04:25:36,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:25:36,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1563 transitions. [2023-08-04 04:25:36,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.94117647058823) internal successors, (1563), 17 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:36,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:36,988 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:36,988 INFO L175 Difference]: Start difference. First operand has 161 places, 394 transitions, 5546 flow. Second operand 17 states and 1563 transitions. [2023-08-04 04:25:36,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 620 transitions, 8692 flow [2023-08-04 04:25:44,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 620 transitions, 8427 flow, removed 128 selfloop flow, removed 2 redundant places. [2023-08-04 04:25:44,610 INFO L231 Difference]: Finished difference. Result has 181 places, 437 transitions, 6844 flow [2023-08-04 04:25:44,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6844, PETRI_PLACES=181, PETRI_TRANSITIONS=437} [2023-08-04 04:25:44,610 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 134 predicate places. [2023-08-04 04:25:44,611 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 437 transitions, 6844 flow [2023-08-04 04:25:44,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:44,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:25:44,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:25:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 04:25:44,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:25:44,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:25:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1197646255, now seen corresponding path program 2 times [2023-08-04 04:25:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:25:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267684290] [2023-08-04 04:25:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:25:44,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:25:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:25:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:25:44,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:25:44,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267684290] [2023-08-04 04:25:44,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267684290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:25:44,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:25:44,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:25:44,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768668040] [2023-08-04 04:25:44,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:25:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:25:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:25:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:25:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:25:44,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-04 04:25:44,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 437 transitions, 6844 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:44,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:25:44,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-04 04:25:44,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:25:53,186 INFO L124 PetriNetUnfolderBase]: 45083/65023 cut-off events. [2023-08-04 04:25:53,186 INFO L125 PetriNetUnfolderBase]: For 892898/895250 co-relation queries the response was YES. [2023-08-04 04:25:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323564 conditions, 65023 events. 45083/65023 cut-off events. For 892898/895250 co-relation queries the response was YES. Maximal size of possible extension queue 2417. Compared 465060 event pairs, 7764 based on Foata normal form. 848/60895 useless extension candidates. Maximal degree in co-relation 323492. Up to 50034 conditions per place. [2023-08-04 04:25:54,317 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 482 selfloop transitions, 122 changer transitions 0/612 dead transitions. [2023-08-04 04:25:54,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 612 transitions, 9556 flow [2023-08-04 04:25:54,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:25:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:25:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-08-04 04:25:54,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2023-08-04 04:25:54,319 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-08-04 04:25:54,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-08-04 04:25:54,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:25:54,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-08-04 04:25:54,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:54,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:54,325 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:54,325 INFO L175 Difference]: Start difference. First operand has 181 places, 437 transitions, 6844 flow. Second operand 15 states and 1377 transitions. [2023-08-04 04:25:54,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 612 transitions, 9556 flow [2023-08-04 04:26:11,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 612 transitions, 9132 flow, removed 203 selfloop flow, removed 5 redundant places. [2023-08-04 04:26:11,988 INFO L231 Difference]: Finished difference. Result has 193 places, 456 transitions, 7311 flow [2023-08-04 04:26:11,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=6498, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7311, PETRI_PLACES=193, PETRI_TRANSITIONS=456} [2023-08-04 04:26:11,989 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 146 predicate places. [2023-08-04 04:26:11,989 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 456 transitions, 7311 flow [2023-08-04 04:26:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:11,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:26:11,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:26:11,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 04:26:11,990 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:26:11,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:26:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash -74034225, now seen corresponding path program 1 times [2023-08-04 04:26:11,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:26:11,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722918639] [2023-08-04 04:26:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:26:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:26:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:26:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:26:12,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:26:12,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722918639] [2023-08-04 04:26:12,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722918639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:26:12,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:26:12,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 04:26:12,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676077629] [2023-08-04 04:26:12,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:26:12,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 04:26:12,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:26:12,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 04:26:12,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:26:12,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 198 [2023-08-04 04:26:12,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 456 transitions, 7311 flow. Second operand has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:12,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:26:12,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 198 [2023-08-04 04:26:12,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:26:26,698 INFO L124 PetriNetUnfolderBase]: 59308/83584 cut-off events. [2023-08-04 04:26:26,698 INFO L125 PetriNetUnfolderBase]: For 1157304/1159696 co-relation queries the response was YES. [2023-08-04 04:26:27,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416767 conditions, 83584 events. 59308/83584 cut-off events. For 1157304/1159696 co-relation queries the response was YES. Maximal size of possible extension queue 3025. Compared 590234 event pairs, 4048 based on Foata normal form. 1208/78467 useless extension candidates. Maximal degree in co-relation 416692. Up to 39026 conditions per place. [2023-08-04 04:26:27,944 INFO L140 encePairwiseOnDemand]: 183/198 looper letters, 453 selfloop transitions, 401 changer transitions 0/867 dead transitions. [2023-08-04 04:26:27,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 867 transitions, 13955 flow [2023-08-04 04:26:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:26:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:26:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1406 transitions. [2023-08-04 04:26:27,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734006734006734 [2023-08-04 04:26:27,946 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1406 transitions. [2023-08-04 04:26:27,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1406 transitions. [2023-08-04 04:26:27,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:26:27,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1406 transitions. [2023-08-04 04:26:27,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.73333333333333) internal successors, (1406), 15 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:27,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:27,950 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:27,950 INFO L175 Difference]: Start difference. First operand has 193 places, 456 transitions, 7311 flow. Second operand 15 states and 1406 transitions. [2023-08-04 04:26:27,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 867 transitions, 13955 flow [2023-08-04 04:26:45,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 867 transitions, 13444 flow, removed 147 selfloop flow, removed 11 redundant places. [2023-08-04 04:26:45,233 INFO L231 Difference]: Finished difference. Result has 205 places, 635 transitions, 11766 flow [2023-08-04 04:26:45,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11766, PETRI_PLACES=205, PETRI_TRANSITIONS=635} [2023-08-04 04:26:45,233 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 158 predicate places. [2023-08-04 04:26:45,234 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 635 transitions, 11766 flow [2023-08-04 04:26:45,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:45,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:26:45,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:26:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 04:26:45,234 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:26:45,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:26:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash -567227402, now seen corresponding path program 1 times [2023-08-04 04:26:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:26:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53327929] [2023-08-04 04:26:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:26:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:26:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:26:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:26:45,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:26:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53327929] [2023-08-04 04:26:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53327929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:26:45,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:26:45,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 04:26:45,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422142648] [2023-08-04 04:26:45,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:26:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 04:26:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:26:45,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 04:26:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:26:45,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 198 [2023-08-04 04:26:45,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 635 transitions, 11766 flow. Second operand has 9 states, 9 states have (on average 78.11111111111111) internal successors, (703), 9 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:45,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:26:45,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 198 [2023-08-04 04:26:45,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:27:00,581 INFO L124 PetriNetUnfolderBase]: 56606/81526 cut-off events. [2023-08-04 04:27:00,581 INFO L125 PetriNetUnfolderBase]: For 1450760/1453544 co-relation queries the response was YES. [2023-08-04 04:27:01,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457348 conditions, 81526 events. 56606/81526 cut-off events. For 1450760/1453544 co-relation queries the response was YES. Maximal size of possible extension queue 3091. Compared 599141 event pairs, 7108 based on Foata normal form. 1428/76959 useless extension candidates. Maximal degree in co-relation 457264. Up to 36227 conditions per place. [2023-08-04 04:27:02,036 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 511 selfloop transitions, 423 changer transitions 0/943 dead transitions. [2023-08-04 04:27:02,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 943 transitions, 16691 flow [2023-08-04 04:27:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-04 04:27:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-04 04:27:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2046 transitions. [2023-08-04 04:27:02,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2023-08-04 04:27:02,038 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2046 transitions. [2023-08-04 04:27:02,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2046 transitions. [2023-08-04 04:27:02,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:27:02,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2046 transitions. [2023-08-04 04:27:02,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 88.95652173913044) internal successors, (2046), 23 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:02,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 198.0) internal successors, (4752), 24 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:02,044 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 198.0) internal successors, (4752), 24 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:02,044 INFO L175 Difference]: Start difference. First operand has 205 places, 635 transitions, 11766 flow. Second operand 23 states and 2046 transitions. [2023-08-04 04:27:02,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 943 transitions, 16691 flow [2023-08-04 04:27:27,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 943 transitions, 15943 flow, removed 272 selfloop flow, removed 6 redundant places. [2023-08-04 04:27:27,856 INFO L231 Difference]: Finished difference. Result has 223 places, 664 transitions, 12934 flow [2023-08-04 04:27:27,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=11139, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12934, PETRI_PLACES=223, PETRI_TRANSITIONS=664} [2023-08-04 04:27:27,857 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 176 predicate places. [2023-08-04 04:27:27,857 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 664 transitions, 12934 flow [2023-08-04 04:27:27,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.11111111111111) internal successors, (703), 9 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:27,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:27:27,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:27:27,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 04:27:27,858 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:27:27,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:27:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash 468306584, now seen corresponding path program 2 times [2023-08-04 04:27:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:27:27,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417886605] [2023-08-04 04:27:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:27:27,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:27:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:27:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:27:27,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:27:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417886605] [2023-08-04 04:27:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417886605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:27:27,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:27:27,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 04:27:27,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149130282] [2023-08-04 04:27:27,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:27:27,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 04:27:27,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:27:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 04:27:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:27:28,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 198 [2023-08-04 04:27:28,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 664 transitions, 12934 flow. Second operand has 9 states, 9 states have (on average 78.0) internal successors, (702), 9 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:28,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:27:28,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 198 [2023-08-04 04:27:28,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:27:44,448 INFO L124 PetriNetUnfolderBase]: 56668/81356 cut-off events. [2023-08-04 04:27:44,448 INFO L125 PetriNetUnfolderBase]: For 1554260/1559736 co-relation queries the response was YES. [2023-08-04 04:27:45,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472743 conditions, 81356 events. 56668/81356 cut-off events. For 1554260/1559736 co-relation queries the response was YES. Maximal size of possible extension queue 3093. Compared 595679 event pairs, 3436 based on Foata normal form. 2188/77551 useless extension candidates. Maximal degree in co-relation 472656. Up to 41268 conditions per place. [2023-08-04 04:27:45,630 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 459 selfloop transitions, 423 changer transitions 1/898 dead transitions. [2023-08-04 04:27:45,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 898 transitions, 16729 flow [2023-08-04 04:27:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 04:27:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 04:27:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1540 transitions. [2023-08-04 04:27:45,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2023-08-04 04:27:45,632 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1540 transitions. [2023-08-04 04:27:45,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1540 transitions. [2023-08-04 04:27:45,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:27:45,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1540 transitions. [2023-08-04 04:27:45,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.58823529411765) internal successors, (1540), 17 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:45,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:45,636 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:45,636 INFO L175 Difference]: Start difference. First operand has 223 places, 664 transitions, 12934 flow. Second operand 17 states and 1540 transitions. [2023-08-04 04:27:45,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 898 transitions, 16729 flow [2023-08-04 04:28:11,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 898 transitions, 16036 flow, removed 95 selfloop flow, removed 14 redundant places. [2023-08-04 04:28:11,215 INFO L231 Difference]: Finished difference. Result has 231 places, 696 transitions, 14510 flow [2023-08-04 04:28:11,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=12285, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=14510, PETRI_PLACES=231, PETRI_TRANSITIONS=696} [2023-08-04 04:28:11,216 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 184 predicate places. [2023-08-04 04:28:11,216 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 696 transitions, 14510 flow [2023-08-04 04:28:11,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.0) internal successors, (702), 9 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:28:11,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:28:11,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:28:11,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 04:28:11,217 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:28:11,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:28:11,217 INFO L85 PathProgramCache]: Analyzing trace with hash -817022730, now seen corresponding path program 3 times [2023-08-04 04:28:11,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:28:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650271149] [2023-08-04 04:28:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:28:11,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:28:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:28:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:28:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:28:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650271149] [2023-08-04 04:28:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650271149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:28:11,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:28:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:28:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483274558] [2023-08-04 04:28:11,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:28:11,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:28:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:28:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:28:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:28:11,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 198 [2023-08-04 04:28:11,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 696 transitions, 14510 flow. Second operand has 10 states, 10 states have (on average 77.9) internal successors, (779), 10 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:28:11,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:28:11,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 198 [2023-08-04 04:28:11,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand