/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_bad_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:17:50,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:17:50,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:17:50,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:17:50,400 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:17:50,400 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:17:50,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:17:50,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:17:50,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:17:50,432 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:17:50,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:17:50,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:17:50,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:17:50,435 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:17:50,435 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:17:50,435 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:17:50,435 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:17:50,435 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:17:50,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:17:50,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:17:50,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:17:50,436 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:17:50,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:17:50,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:17:50,437 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:17:50,437 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:17:50,437 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:17:50,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:17:50,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:17:50,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:17:50,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:17:50,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:17:50,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:17:50,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:17:50,439 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:17:50,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:17:50,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:17:50,440 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:17:50,440 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:17:50,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:17:50,440 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:17:50,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:17:50,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:17:50,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:17:50,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:17:50,680 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:17:50,681 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:17:50,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_bad_bound2.i [2023-08-03 22:17:51,847 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:17:52,091 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:17:52,092 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_bad_bound2.i [2023-08-03 22:17:52,116 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c03a9779a/da3ccd6137284524a773219ca7e2f785/FLAG4ad010768 [2023-08-03 22:17:52,128 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c03a9779a/da3ccd6137284524a773219ca7e2f785 [2023-08-03 22:17:52,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:17:52,131 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:17:52,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:17:52,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:17:52,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:17:52,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6232eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52, skipping insertion in model container [2023-08-03 22:17:52,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,183 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:17:52,525 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_bad_bound2.i[39920,39933] [2023-08-03 22:17:52,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:17:52,546 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:17:52,572 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [218] [2023-08-03 22:17:52,574 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [219] [2023-08-03 22:17:52,591 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [730] [2023-08-03 22:17:52,595 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned long [871] [2023-08-03 22:17:52,601 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_bad_bound2.i[39920,39933] [2023-08-03 22:17:52,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:17:52,656 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:17:52,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52 WrapperNode [2023-08-03 22:17:52,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:17:52,658 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:17:52,658 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:17:52,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:17:52,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,691 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,721 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 113 [2023-08-03 22:17:52,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:17:52,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:17:52,722 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:17:52,722 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:17:52,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,742 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,742 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,752 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,756 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:17:52,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:17:52,797 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:17:52,797 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:17:52,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (1/1) ... [2023-08-03 22:17:52,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:17:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:17:52,833 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) [2023-08-03 22:17:52,844 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 [2023-08-03 22:17:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:17:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:17:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-03 22:17:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:17:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 22:17:52,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 22:17:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 22:17:52,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 22:17:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:17:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:17:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:17:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:17:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:17:52,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:17:52,863 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:17:52,968 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:17:52,970 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:17:53,155 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:17:53,161 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:17:53,162 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-03 22:17:53,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:17:53 BoogieIcfgContainer [2023-08-03 22:17:53,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:17:53,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:17:53,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:17:53,168 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:17:53,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:17:52" (1/3) ... [2023-08-03 22:17:53,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9ba06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:17:53, skipping insertion in model container [2023-08-03 22:17:53,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:17:52" (2/3) ... [2023-08-03 22:17:53,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9ba06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:17:53, skipping insertion in model container [2023-08-03 22:17:53,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:17:53" (3/3) ... [2023-08-03 22:17:53,170 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-deagle_arithmetic_prog_bad_bound2.i [2023-08-03 22:17:53,177 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:17:53,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:17:53,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 22:17:53,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:17:53,244 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 22:17:53,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-03 22:17:53,385 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-03 22:17:53,385 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 22:17:53,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-03 22:17:53,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 161 transitions, 344 flow [2023-08-03 22:17:53,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 161 transitions, 344 flow [2023-08-03 22:17:53,416 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:17:53,435 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-03 22:17:53,441 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-03 22:17:53,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-03 22:17:53,513 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-03 22:17:53,513 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 22:17:53,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-03 22:17:53,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 6348 [2023-08-03 22:17:58,594 INFO L134 LiptonReduction]: Checked pairs total: 15226 [2023-08-03 22:17:58,595 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-03 22:17:58,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:17:58,610 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;@35a6f3f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:17:58,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:17:58,615 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:17:58,616 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-08-03 22:17:58,616 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:17:58,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:17:58,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:17:58,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:17:58,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:17:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash 895305292, now seen corresponding path program 1 times [2023-08-03 22:17:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:17:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135956220] [2023-08-03 22:17:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:17:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:17:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:17:58,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:17:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:17:58,809 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:17:58,811 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:17:58,811 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:17:58,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:17:58,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:17:58,813 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:17:58,815 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 22:17:58,816 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:17:58,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:17:58,846 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 22:17:58,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:17:58,975 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:17:58,975 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:17:58,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5084 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-03 22:17:58,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:17:58,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 216 transitions, 480 flow [2023-08-03 22:17:58,990 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:17:58,990 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:17:58,990 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:17:58,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:17:59,110 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:17:59,111 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:17:59,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5084 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-03 22:17:59,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 18472 [2023-08-03 22:18:04,097 INFO L134 LiptonReduction]: Checked pairs total: 53886 [2023-08-03 22:18:04,097 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-03 22:18:04,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:18:04,121 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;@35a6f3f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:18:04,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:18:04,131 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:18:04,132 INFO L124 PetriNetUnfolderBase]: 14/105 cut-off events. [2023-08-03 22:18:04,132 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-03 22:18:04,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:04,132 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:18:04,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:18:04,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash -138494713, now seen corresponding path program 1 times [2023-08-03 22:18:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:04,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172249317] [2023-08-03 22:18:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:18:04,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:04,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172249317] [2023-08-03 22:18:04,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172249317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:18:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30278798] [2023-08-03 22:18:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:04,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:18:04,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:18:04,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:18:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:04,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:18:04,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:18:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:18:04,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:18:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30278798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:04,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:18:04,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:18:04,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709704776] [2023-08-03 22:18:04,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:04,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:18:04,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:18:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:18:04,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:18:04,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 186.6) internal successors, (933), 5 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:04,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:04,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:18:04,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:10,236 INFO L124 PetriNetUnfolderBase]: 63780/90777 cut-off events. [2023-08-03 22:18:10,236 INFO L125 PetriNetUnfolderBase]: For 4403/4403 co-relation queries the response was YES. [2023-08-03 22:18:10,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172853 conditions, 90777 events. 63780/90777 cut-off events. For 4403/4403 co-relation queries the response was YES. Maximal size of possible extension queue 3302. Compared 652931 event pairs, 20408 based on Foata normal form. 9914/81059 useless extension candidates. Maximal degree in co-relation 38105. Up to 79176 conditions per place. [2023-08-03 22:18:10,566 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 52 selfloop transitions, 5 changer transitions 20/99 dead transitions. [2023-08-03 22:18:10,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 392 flow [2023-08-03 22:18:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:18:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:18:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1008 transitions. [2023-08-03 22:18:10,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404825737265415 [2023-08-03 22:18:10,587 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1008 transitions. [2023-08-03 22:18:10,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1008 transitions. [2023-08-03 22:18:10,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:10,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1008 transitions. [2023-08-03 22:18:10,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:10,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:10,616 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:10,618 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 212 flow. Second operand 5 states and 1008 transitions. [2023-08-03 22:18:10,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 392 flow [2023-08-03 22:18:10,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:18:10,630 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 155 flow [2023-08-03 22:18:10,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-03 22:18:10,635 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-03 22:18:10,635 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 155 flow [2023-08-03 22:18:10,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 186.6) internal successors, (933), 5 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:10,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:10,636 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 22:18:10,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 22:18:10,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:10,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:18:10,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1833361212, now seen corresponding path program 1 times [2023-08-03 22:18:10,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704536712] [2023-08-03 22:18:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:10,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:18:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:10,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704536712] [2023-08-03 22:18:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704536712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:10,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:18:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:18:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136696749] [2023-08-03 22:18:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:18:10,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:18:10,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:10,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:10,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:18:10,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:12,171 INFO L124 PetriNetUnfolderBase]: 13236/19683 cut-off events. [2023-08-03 22:18:12,171 INFO L125 PetriNetUnfolderBase]: For 644/644 co-relation queries the response was YES. [2023-08-03 22:18:12,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37092 conditions, 19683 events. 13236/19683 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 127727 event pairs, 6713 based on Foata normal form. 1/16593 useless extension candidates. Maximal degree in co-relation 7266. Up to 16505 conditions per place. [2023-08-03 22:18:12,271 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 42 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-03 22:18:12,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 254 flow [2023-08-03 22:18:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:18:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:18:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-03 22:18:12,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379803395889187 [2023-08-03 22:18:12,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-03 22:18:12,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-03 22:18:12,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:12,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-03 22:18:12,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:12,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:12,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:12,280 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 155 flow. Second operand 3 states and 602 transitions. [2023-08-03 22:18:12,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 254 flow [2023-08-03 22:18:12,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 251 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 22:18:12,285 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 151 flow [2023-08-03 22:18:12,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-08-03 22:18:12,286 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-08-03 22:18:12,286 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 151 flow [2023-08-03 22:18:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:12,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:12,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:18:12,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:18:12,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:18:12,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2070310180, now seen corresponding path program 1 times [2023-08-03 22:18:12,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:12,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343546345] [2023-08-03 22:18:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:18:12,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:12,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343546345] [2023-08-03 22:18:12,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343546345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:18:12,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46862160] [2023-08-03 22:18:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:12,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:18:12,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:18:12,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 22:18:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:12,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:18:12,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:18:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:18:12,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:18:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:18:12,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46862160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:18:12,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:18:12,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:18:12,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207886455] [2023-08-03 22:18:12,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:18:12,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:18:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:18:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:18:12,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:18:12,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:12,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:12,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:18:12,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:13,425 INFO L124 PetriNetUnfolderBase]: 11584/16956 cut-off events. [2023-08-03 22:18:13,425 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-08-03 22:18:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 16956 events. 11584/16956 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 105598 event pairs, 3791 based on Foata normal form. 5/14312 useless extension candidates. Maximal degree in co-relation 13406. Up to 14231 conditions per place. [2023-08-03 22:18:13,681 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 52 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-03 22:18:13,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 296 flow [2023-08-03 22:18:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:18:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:18:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-08-03 22:18:13,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335120643431636 [2023-08-03 22:18:13,684 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-08-03 22:18:13,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-08-03 22:18:13,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:13,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-08-03 22:18:13,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:13,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:13,690 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:13,690 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 151 flow. Second operand 4 states and 796 transitions. [2023-08-03 22:18:13,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 296 flow [2023-08-03 22:18:13,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:18:13,692 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 148 flow [2023-08-03 22:18:13,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-03 22:18:13,695 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-08-03 22:18:13,698 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 148 flow [2023-08-03 22:18:13,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:13,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:13,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:18:13,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 22:18:13,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 22:18:13,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:18:13,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1340013933, now seen corresponding path program 1 times [2023-08-03 22:18:13,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:13,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438052446] [2023-08-03 22:18:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:13,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:18:13,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438052446] [2023-08-03 22:18:13,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438052446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:18:13,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913516148] [2023-08-03 22:18:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:13,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:13,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:18:13,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:18:14,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 22:18:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:14,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:18:14,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:18:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:18:14,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:18:14,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913516148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:14,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:18:14,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 22:18:14,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264417588] [2023-08-03 22:18:14,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:14,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:18:14,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:18:14,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:18:14,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:18:14,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:14,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:14,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:18:14,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:14,669 INFO L124 PetriNetUnfolderBase]: 8009/10984 cut-off events. [2023-08-03 22:18:14,669 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-08-03 22:18:14,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21522 conditions, 10984 events. 8009/10984 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 55331 event pairs, 68 based on Foata normal form. 750/10091 useless extension candidates. Maximal degree in co-relation 4916. Up to 4850 conditions per place. [2023-08-03 22:18:14,697 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-08-03 22:18:14,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 114 transitions, 444 flow [2023-08-03 22:18:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:18:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:18:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1018 transitions. [2023-08-03 22:18:14,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458445040214477 [2023-08-03 22:18:14,701 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1018 transitions. [2023-08-03 22:18:14,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1018 transitions. [2023-08-03 22:18:14,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:14,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1018 transitions. [2023-08-03 22:18:14,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:14,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:14,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:14,707 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 148 flow. Second operand 5 states and 1018 transitions. [2023-08-03 22:18:14,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 114 transitions, 444 flow [2023-08-03 22:18:14,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 114 transitions, 437 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 22:18:14,713 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-03 22:18:14,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-03 22:18:14,714 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-08-03 22:18:14,714 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-03 22:18:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:14,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:18:14,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:18:14,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 22:18:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:14,920 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 22:18:14,920 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 22:18:14,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:18:15,065 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:18:15,065 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:18:15,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5084 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-03 22:18:15,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:18:15,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 216 transitions, 480 flow [2023-08-03 22:18:15,075 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:18:15,075 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:18:15,076 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:18:15,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:18:15,159 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:18:15,159 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:18:15,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5084 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-03 22:18:15,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 18472 [2023-08-03 22:18:20,050 INFO L134 LiptonReduction]: Checked pairs total: 53531 [2023-08-03 22:18:20,051 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-03 22:18:20,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:18:20,053 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;@35a6f3f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:18:20,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:18:20,056 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:18:20,056 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-03 22:18:20,056 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:18:20,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:20,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 22:18:20,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:18:20,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash 930402596, now seen corresponding path program 1 times [2023-08-03 22:18:20,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:20,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830256342] [2023-08-03 22:18:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:20,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:18:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830256342] [2023-08-03 22:18:20,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830256342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:20,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:18:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:18:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362116206] [2023-08-03 22:18:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:20,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:18:20,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:18:20,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:20,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:20,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:18:20,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:24,395 INFO L124 PetriNetUnfolderBase]: 63602/91760 cut-off events. [2023-08-03 22:18:24,396 INFO L125 PetriNetUnfolderBase]: For 4662/4662 co-relation queries the response was YES. [2023-08-03 22:18:24,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173559 conditions, 91760 events. 63602/91760 cut-off events. For 4662/4662 co-relation queries the response was YES. Maximal size of possible extension queue 3363. Compared 668910 event pairs, 30330 based on Foata normal form. 9888/81383 useless extension candidates. Maximal degree in co-relation 39105. Up to 79004 conditions per place. [2023-08-03 22:18:24,962 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 57 selfloop transitions, 2 changer transitions 4/86 dead transitions. [2023-08-03 22:18:24,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 342 flow [2023-08-03 22:18:24,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:18:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:18:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-03 22:18:24,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585344057193923 [2023-08-03 22:18:24,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-03 22:18:24,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-03 22:18:24,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:24,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-03 22:18:24,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:24,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:24,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:24,970 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 212 flow. Second operand 3 states and 625 transitions. [2023-08-03 22:18:24,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 342 flow [2023-08-03 22:18:24,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:18:24,974 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 200 flow [2023-08-03 22:18:24,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-03 22:18:24,975 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-03 22:18:24,975 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 200 flow [2023-08-03 22:18:24,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:24,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:24,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:18:24,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:18:24,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:18:24,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1140183451, now seen corresponding path program 1 times [2023-08-03 22:18:24,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:24,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271206633] [2023-08-03 22:18:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:24,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:18:25,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:25,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271206633] [2023-08-03 22:18:25,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271206633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:18:25,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292322588] [2023-08-03 22:18:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:25,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:25,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:18:25,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:18:25,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 22:18:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:25,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:18:25,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:18:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:18:25,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:18:25,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292322588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:25,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:18:25,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:18:25,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837959404] [2023-08-03 22:18:25,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:25,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:25,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:25,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:18:25,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:18:25,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:25,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:25,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:18:25,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:30,008 INFO L124 PetriNetUnfolderBase]: 56012/78692 cut-off events. [2023-08-03 22:18:30,008 INFO L125 PetriNetUnfolderBase]: For 3905/3905 co-relation queries the response was YES. [2023-08-03 22:18:30,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151147 conditions, 78692 events. 56012/78692 cut-off events. For 3905/3905 co-relation queries the response was YES. Maximal size of possible extension queue 2921. Compared 535910 event pairs, 27168 based on Foata normal form. 0/63690 useless extension candidates. Maximal degree in co-relation 151093. Up to 69179 conditions per place. [2023-08-03 22:18:30,366 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 70 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-03 22:18:30,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 384 flow [2023-08-03 22:18:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:18:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:18:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-08-03 22:18:30,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630026809651475 [2023-08-03 22:18:30,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-08-03 22:18:30,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-08-03 22:18:30,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:30,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-08-03 22:18:30,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:30,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:30,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:30,372 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 200 flow. Second operand 3 states and 630 transitions. [2023-08-03 22:18:30,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 384 flow [2023-08-03 22:18:30,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 22:18:30,383 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 204 flow [2023-08-03 22:18:30,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-08-03 22:18:30,383 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-03 22:18:30,383 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 204 flow [2023-08-03 22:18:30,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:30,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:30,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:18:30,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 22:18:30,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:30,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:18:30,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash 560919991, now seen corresponding path program 1 times [2023-08-03 22:18:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030751126] [2023-08-03 22:18:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:18:30,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030751126] [2023-08-03 22:18:30,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030751126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:18:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61867764] [2023-08-03 22:18:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:30,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:30,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:18:30,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:18:30,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 22:18:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:30,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:18:30,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:18:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:18:30,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:18:30,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61867764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:30,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:18:30,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:18:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502251001] [2023-08-03 22:18:30,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:30,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:30,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:30,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:18:30,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:18:30,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:30,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:30,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:18:30,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:33,716 INFO L124 PetriNetUnfolderBase]: 41376/57096 cut-off events. [2023-08-03 22:18:33,717 INFO L125 PetriNetUnfolderBase]: For 3396/3396 co-relation queries the response was YES. [2023-08-03 22:18:33,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113801 conditions, 57096 events. 41376/57096 cut-off events. For 3396/3396 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 357404 event pairs, 19358 based on Foata normal form. 0/46866 useless extension candidates. Maximal degree in co-relation 28506. Up to 37971 conditions per place. [2023-08-03 22:18:33,943 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 82 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-03 22:18:33,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 444 flow [2023-08-03 22:18:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:18:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:18:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-03 22:18:33,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-03 22:18:33,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-03 22:18:33,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-03 22:18:33,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:33,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-03 22:18:33,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 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) [2023-08-03 22:18:33,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:33,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:33,949 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 204 flow. Second operand 3 states and 641 transitions. [2023-08-03 22:18:33,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 444 flow [2023-08-03 22:18:33,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:18:33,953 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 214 flow [2023-08-03 22:18:33,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2023-08-03 22:18:33,953 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-03 22:18:33,953 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 214 flow [2023-08-03 22:18:33,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:33,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:33,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:18:33,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 22:18:34,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:34,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:18:34,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:34,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1776832383, now seen corresponding path program 1 times [2023-08-03 22:18:34,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:34,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831431496] [2023-08-03 22:18:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:34,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:18:34,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:34,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831431496] [2023-08-03 22:18:34,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831431496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:34,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:18:34,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:18:34,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472269896] [2023-08-03 22:18:34,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:34,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:34,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:34,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:34,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:18:34,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:18:34,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 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) [2023-08-03 22:18:34,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:34,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:18:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:38,878 INFO L124 PetriNetUnfolderBase]: 63301/92856 cut-off events. [2023-08-03 22:18:38,878 INFO L125 PetriNetUnfolderBase]: For 15987/15987 co-relation queries the response was YES. [2023-08-03 22:18:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183926 conditions, 92856 events. 63301/92856 cut-off events. For 15987/15987 co-relation queries the response was YES. Maximal size of possible extension queue 2653. Compared 694096 event pairs, 27426 based on Foata normal form. 0/78763 useless extension candidates. Maximal degree in co-relation 87445. Up to 52445 conditions per place. [2023-08-03 22:18:39,282 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 100 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-08-03 22:18:39,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 563 flow [2023-08-03 22:18:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:18:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:18:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-03 22:18:39,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853440571939231 [2023-08-03 22:18:39,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-03 22:18:39,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-03 22:18:39,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:39,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-03 22:18:39,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:39,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:39,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:39,289 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 214 flow. Second operand 3 states and 655 transitions. [2023-08-03 22:18:39,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 563 flow [2023-08-03 22:18:39,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 125 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:18:39,377 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 224 flow [2023-08-03 22:18:39,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2023-08-03 22:18:39,378 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-03 22:18:39,378 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 224 flow [2023-08-03 22:18:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 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) [2023-08-03 22:18:39,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:39,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:18:39,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 22:18:39,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:18:39,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2062271318, now seen corresponding path program 1 times [2023-08-03 22:18:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:39,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082716643] [2023-08-03 22:18:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:39,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:18:39,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082716643] [2023-08-03 22:18:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082716643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:18:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542054296] [2023-08-03 22:18:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:39,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:18:39,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:18:39,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 22:18:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:39,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:18:39,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:18:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:18:39,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:18:39,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542054296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:39,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:18:39,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:18:39,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335048375] [2023-08-03 22:18:39,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:39,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:39,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:18:39,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:18:39,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 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) [2023-08-03 22:18:39,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:39,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:18:39,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:47,154 INFO L124 PetriNetUnfolderBase]: 86287/138754 cut-off events. [2023-08-03 22:18:47,154 INFO L125 PetriNetUnfolderBase]: For 29092/29092 co-relation queries the response was YES. [2023-08-03 22:18:47,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272513 conditions, 138754 events. 86287/138754 cut-off events. For 29092/29092 co-relation queries the response was YES. Maximal size of possible extension queue 4084. Compared 1266628 event pairs, 42603 based on Foata normal form. 0/121428 useless extension candidates. Maximal degree in co-relation 160086. Up to 79854 conditions per place. [2023-08-03 22:18:47,798 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 95 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-03 22:18:47,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 544 flow [2023-08-03 22:18:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:18:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:18:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-03 22:18:47,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579982126899017 [2023-08-03 22:18:47,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-03 22:18:47,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-03 22:18:47,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:47,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-03 22:18:47,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:47,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:47,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:47,803 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 224 flow. Second operand 3 states and 649 transitions. [2023-08-03 22:18:47,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 544 flow [2023-08-03 22:18:47,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 120 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:18:47,852 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 234 flow [2023-08-03 22:18:47,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-08-03 22:18:47,853 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-03 22:18:47,853 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 234 flow [2023-08-03 22:18:47,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 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) [2023-08-03 22:18:47,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:47,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:18:47,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 22:18:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:48,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:18:48,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1717975363, now seen corresponding path program 1 times [2023-08-03 22:18:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:48,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801614609] [2023-08-03 22:18:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:48,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 22:18:48,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:48,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801614609] [2023-08-03 22:18:48,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801614609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:48,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:18:48,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:18:48,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393421238] [2023-08-03 22:18:48,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:48,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:48,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:48,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:18:48,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:18:48,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 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) [2023-08-03 22:18:48,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:48,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:18:48,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:58,945 INFO L124 PetriNetUnfolderBase]: 127582/183524 cut-off events. [2023-08-03 22:18:58,946 INFO L125 PetriNetUnfolderBase]: For 58795/58795 co-relation queries the response was YES. [2023-08-03 22:18:59,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395023 conditions, 183524 events. 127582/183524 cut-off events. For 58795/58795 co-relation queries the response was YES. Maximal size of possible extension queue 4711. Compared 1427206 event pairs, 58079 based on Foata normal form. 0/165318 useless extension candidates. Maximal degree in co-relation 239308. Up to 108212 conditions per place. [2023-08-03 22:18:59,923 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 101 selfloop transitions, 2 changer transitions 1/127 dead transitions. [2023-08-03 22:18:59,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 599 flow [2023-08-03 22:18:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:18:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:18:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-03 22:18:59,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844504021447721 [2023-08-03 22:18:59,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-03 22:18:59,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-03 22:18:59,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:59,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-03 22:18:59,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:59,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:59,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:59,929 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 234 flow. Second operand 3 states and 654 transitions. [2023-08-03 22:18:59,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 599 flow [2023-08-03 22:19:00,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 595 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:19:00,035 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 244 flow [2023-08-03 22:19:00,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-03 22:19:00,035 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-08-03 22:19:00,035 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 244 flow [2023-08-03 22:19:00,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 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) [2023-08-03 22:19:00,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:19:00,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:19:00,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 22:19:00,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:19:00,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:19:00,036 INFO L85 PathProgramCache]: Analyzing trace with hash -757510222, now seen corresponding path program 1 times [2023-08-03 22:19:00,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:19:00,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845793836] [2023-08-03 22:19:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:19:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:19:00,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:19:00,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845793836] [2023-08-03 22:19:00,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845793836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:19:00,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705125650] [2023-08-03 22:19:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:00,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:19:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:19:00,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:19:00,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 22:19:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:00,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:19:00,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:19:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:19:00,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:19:00,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705125650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:19:00,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:19:00,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:19:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836456384] [2023-08-03 22:19:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:19:00,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:19:00,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:19:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:19:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:19:00,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:19:00,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:00,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:19:00,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:19:00,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:19:09,650 INFO L124 PetriNetUnfolderBase]: 117811/162304 cut-off events. [2023-08-03 22:19:09,650 INFO L125 PetriNetUnfolderBase]: For 64190/64190 co-relation queries the response was YES. [2023-08-03 22:19:10,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370737 conditions, 162304 events. 117811/162304 cut-off events. For 64190/64190 co-relation queries the response was YES. Maximal size of possible extension queue 4026. Compared 1126725 event pairs, 70910 based on Foata normal form. 0/152288 useless extension candidates. Maximal degree in co-relation 224121. Up to 129041 conditions per place. [2023-08-03 22:19:10,522 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 89 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-08-03 22:19:10,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 530 flow [2023-08-03 22:19:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:19:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:19:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-03 22:19:10,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-03 22:19:10,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-03 22:19:10,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-03 22:19:10,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:19:10,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-03 22:19:10,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 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) [2023-08-03 22:19:10,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:10,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:10,527 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 244 flow. Second operand 3 states and 641 transitions. [2023-08-03 22:19:10,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 530 flow [2023-08-03 22:19:10,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:19:10,681 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 254 flow [2023-08-03 22:19:10,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2023-08-03 22:19:10,682 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2023-08-03 22:19:10,682 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 254 flow [2023-08-03 22:19:10,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:10,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:19:10,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:19:10,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 22:19:10,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:19:10,887 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:19:10,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:19:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1568484559, now seen corresponding path program 1 times [2023-08-03 22:19:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:19:10,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369912132] [2023-08-03 22:19:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:10,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:19:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:19:10,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:19:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369912132] [2023-08-03 22:19:10,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369912132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:19:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820846623] [2023-08-03 22:19:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:10,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:19:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:19:10,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:19:10,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 22:19:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:11,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:19:11,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:19:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 22:19:11,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:19:11,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820846623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:19:11,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:19:11,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:19:11,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448310332] [2023-08-03 22:19:11,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:19:11,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:19:11,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:19:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:19:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:19:11,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:19:11,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:11,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:19:11,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:19:11,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:19:26,098 INFO L124 PetriNetUnfolderBase]: 166284/244318 cut-off events. [2023-08-03 22:19:26,099 INFO L125 PetriNetUnfolderBase]: For 89414/89414 co-relation queries the response was YES. [2023-08-03 22:19:26,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534217 conditions, 244318 events. 166284/244318 cut-off events. For 89414/89414 co-relation queries the response was YES. Maximal size of possible extension queue 5692. Compared 2010097 event pairs, 80406 based on Foata normal form. 0/231305 useless extension candidates. Maximal degree in co-relation 457539. Up to 147085 conditions per place. [2023-08-03 22:19:27,573 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 98 selfloop transitions, 2 changer transitions 1/124 dead transitions. [2023-08-03 22:19:27,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 604 flow [2023-08-03 22:19:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:19:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:19:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-03 22:19:27,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579088471849866 [2023-08-03 22:19:27,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-03 22:19:27,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-03 22:19:27,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:19:27,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-03 22:19:27,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:27,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:27,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:27,579 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 254 flow. Second operand 3 states and 648 transitions. [2023-08-03 22:19:27,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 604 flow [2023-08-03 22:19:29,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:19:29,531 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 264 flow [2023-08-03 22:19:29,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2023-08-03 22:19:29,533 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 12 predicate places. [2023-08-03 22:19:29,533 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 264 flow [2023-08-03 22:19:29,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:29,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:19:29,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:19:29,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 22:19:29,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 22:19:29,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:19:29,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:19:29,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1444264762, now seen corresponding path program 1 times [2023-08-03 22:19:29,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:19:29,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799214990] [2023-08-03 22:19:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:29,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:19:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:19:29,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:19:29,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799214990] [2023-08-03 22:19:29,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799214990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:19:29,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992581987] [2023-08-03 22:19:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:29,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:19:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:19:29,795 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:19:29,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 22:19:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:29,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:19:29,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:19:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:19:29,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:19:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:19:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992581987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:19:29,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:19:29,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:19:29,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681796438] [2023-08-03 22:19:29,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:19:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:19:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:19:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:19:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:19:29,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:19:29,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:29,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:19:29,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:19:29,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:19:44,720 INFO L124 PetriNetUnfolderBase]: 156019/217570 cut-off events. [2023-08-03 22:19:44,720 INFO L125 PetriNetUnfolderBase]: For 90002/90002 co-relation queries the response was YES. [2023-08-03 22:19:45,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505360 conditions, 217570 events. 156019/217570 cut-off events. For 90002/90002 co-relation queries the response was YES. Maximal size of possible extension queue 5099. Compared 1595813 event pairs, 66653 based on Foata normal form. 8/210306 useless extension candidates. Maximal degree in co-relation 429022. Up to 192854 conditions per place. [2023-08-03 22:19:46,093 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 78 selfloop transitions, 3 changer transitions 1/105 dead transitions. [2023-08-03 22:19:46,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 498 flow [2023-08-03 22:19:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:19:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:19:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 813 transitions. [2023-08-03 22:19:46,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449061662198391 [2023-08-03 22:19:46,095 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 813 transitions. [2023-08-03 22:19:46,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 813 transitions. [2023-08-03 22:19:46,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:19:46,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 813 transitions. [2023-08-03 22:19:46,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:46,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:46,099 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:46,099 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 264 flow. Second operand 4 states and 813 transitions. [2023-08-03 22:19:46,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 498 flow [2023-08-03 22:19:48,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 105 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:19:48,090 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 276 flow [2023-08-03 22:19:48,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2023-08-03 22:19:48,090 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-03 22:19:48,090 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 276 flow [2023-08-03 22:19:48,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:48,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:19:48,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:19:48,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 22:19:48,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 22:19:48,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:19:48,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:19:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1788429010, now seen corresponding path program 1 times [2023-08-03 22:19:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:19:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357104277] [2023-08-03 22:19:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:48,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:19:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 22:19:48,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:19:48,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357104277] [2023-08-03 22:19:48,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357104277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:19:48,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927367334] [2023-08-03 22:19:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:48,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:19:48,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:19:48,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:19:48,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 22:19:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:48,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:19:48,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:19:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 22:19:48,521 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:19:48,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927367334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:19:48,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:19:48,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 22:19:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437408066] [2023-08-03 22:19:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:19:48,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:19:48,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:19:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:19:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:19:48,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:19:48,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:48,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:19:48,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:19:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:20:02,248 INFO L124 PetriNetUnfolderBase]: 156627/217169 cut-off events. [2023-08-03 22:20:02,248 INFO L125 PetriNetUnfolderBase]: For 85590/85590 co-relation queries the response was YES. [2023-08-03 22:20:03,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503186 conditions, 217169 events. 156627/217169 cut-off events. For 85590/85590 co-relation queries the response was YES. Maximal size of possible extension queue 5005. Compared 1572677 event pairs, 67541 based on Foata normal form. 54/210397 useless extension candidates. Maximal degree in co-relation 426214. Up to 122477 conditions per place. [2023-08-03 22:20:03,633 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 100 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2023-08-03 22:20:03,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 634 flow [2023-08-03 22:20:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:20:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:20:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-03 22:20:03,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764075067024129 [2023-08-03 22:20:03,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-03 22:20:03,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-03 22:20:03,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:20:03,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-03 22:20:03,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:03,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:03,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:03,638 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 276 flow. Second operand 3 states and 645 transitions. [2023-08-03 22:20:03,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 634 flow [2023-08-03 22:20:05,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 623 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 22:20:05,322 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 286 flow [2023-08-03 22:20:05,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-03 22:20:05,323 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-03 22:20:05,323 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 286 flow [2023-08-03 22:20:05,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:05,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:20:05,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:20:05,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-03 22:20:05,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 22:20:05,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:20:05,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:20:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1264143634, now seen corresponding path program 1 times [2023-08-03 22:20:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:20:05,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061730164] [2023-08-03 22:20:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:20:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:20:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:20:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 22:20:05,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:20:05,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061730164] [2023-08-03 22:20:05,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061730164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:20:05,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786264717] [2023-08-03 22:20:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:20:05,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:20:05,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:20:05,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:20:05,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 22:20:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:20:05,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:20:05,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:20:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 22:20:05,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:20:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 22:20:05,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786264717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:20:05,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:20:05,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-03 22:20:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917300782] [2023-08-03 22:20:05,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:20:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:20:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:20:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:20:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:20:05,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:20:05,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 192.33333333333334) internal successors, (1154), 6 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:05,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:20:05,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:20:05,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:20:29,110 INFO L124 PetriNetUnfolderBase]: 227127/338558 cut-off events. [2023-08-03 22:20:29,110 INFO L125 PetriNetUnfolderBase]: For 133122/133122 co-relation queries the response was YES. [2023-08-03 22:20:30,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767056 conditions, 338558 events. 227127/338558 cut-off events. For 133122/133122 co-relation queries the response was YES. Maximal size of possible extension queue 7077. Compared 2960277 event pairs, 44158 based on Foata normal form. 8160/330045 useless extension candidates. Maximal degree in co-relation 656451. Up to 78510 conditions per place. [2023-08-03 22:20:31,601 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 214 selfloop transitions, 5 changer transitions 0/242 dead transitions. [2023-08-03 22:20:31,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 242 transitions, 1327 flow [2023-08-03 22:20:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:20:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:20:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1110 transitions. [2023-08-03 22:20:31,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951742627345844 [2023-08-03 22:20:31,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1110 transitions. [2023-08-03 22:20:31,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1110 transitions. [2023-08-03 22:20:31,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:20:31,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1110 transitions. [2023-08-03 22:20:31,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:31,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:31,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:31,608 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 286 flow. Second operand 5 states and 1110 transitions. [2023-08-03 22:20:31,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 242 transitions, 1327 flow [2023-08-03 22:20:32,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 242 transitions, 1318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:20:32,644 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 313 flow [2023-08-03 22:20:32,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2023-08-03 22:20:32,645 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 22 predicate places. [2023-08-03 22:20:32,646 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 313 flow [2023-08-03 22:20:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.33333333333334) internal successors, (1154), 6 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:32,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:20:32,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:20:32,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 22:20:32,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 22:20:32,847 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:20:32,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:20:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 289321484, now seen corresponding path program 1 times [2023-08-03 22:20:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:20:32,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048381564] [2023-08-03 22:20:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:20:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:20:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:20:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:20:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:20:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048381564] [2023-08-03 22:20:32,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048381564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:20:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991213034] [2023-08-03 22:20:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:20:32,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:20:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:20:32,960 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:20:32,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 22:20:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:20:33,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:20:33,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:20:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:20:33,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:20:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:20:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991213034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:20:33,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:20:33,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-03 22:20:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892687085] [2023-08-03 22:20:33,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:20:33,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:20:33,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:20:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:20:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:20:33,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 373 [2023-08-03 22:20:33,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 313 flow. Second operand has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:33,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:20:33,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 373 [2023-08-03 22:20:33,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:21:08,408 INFO L124 PetriNetUnfolderBase]: 295761/416957 cut-off events. [2023-08-03 22:21:08,408 INFO L125 PetriNetUnfolderBase]: For 306396/306396 co-relation queries the response was YES. [2023-08-03 22:21:10,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030120 conditions, 416957 events. 295761/416957 cut-off events. For 306396/306396 co-relation queries the response was YES. Maximal size of possible extension queue 8035. Compared 3337277 event pairs, 42907 based on Foata normal form. 6570/407401 useless extension candidates. Maximal degree in co-relation 892621. Up to 131206 conditions per place. [2023-08-03 22:21:12,055 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 307 selfloop transitions, 18 changer transitions 3/351 dead transitions. [2023-08-03 22:21:12,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 351 transitions, 2055 flow [2023-08-03 22:21:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-03 22:21:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-03 22:21:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2083 transitions. [2023-08-03 22:21:12,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584450402144772 [2023-08-03 22:21:12,058 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2083 transitions. [2023-08-03 22:21:12,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2083 transitions. [2023-08-03 22:21:12,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:21:12,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2083 transitions. [2023-08-03 22:21:12,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 208.3) internal successors, (2083), 10 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:21:12,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:21:12,064 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:21:12,064 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 313 flow. Second operand 10 states and 2083 transitions. [2023-08-03 22:21:12,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 351 transitions, 2055 flow [2023-08-03 22:21:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 351 transitions, 2001 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-03 22:21:17,803 INFO L231 Difference]: Finished difference. Result has 107 places, 99 transitions, 455 flow [2023-08-03 22:21:17,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=455, PETRI_PLACES=107, PETRI_TRANSITIONS=99} [2023-08-03 22:21:17,804 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2023-08-03 22:21:17,804 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 99 transitions, 455 flow [2023-08-03 22:21:17,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:21:17,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:21:17,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:21:17,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-03 22:21:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 22:21:18,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:21:18,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:21:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash -800027642, now seen corresponding path program 1 times [2023-08-03 22:21:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:21:18,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409182316] [2023-08-03 22:21:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:21:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:21:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:21:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 22:21:18,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:21:18,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409182316] [2023-08-03 22:21:18,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409182316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:21:18,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:21:18,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:21:18,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773839152] [2023-08-03 22:21:18,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:21:18,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:21:18,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:21:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:21:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:21:18,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 373 [2023-08-03 22:21:18,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 99 transitions, 455 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:21:18,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:21:18,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 373 [2023-08-03 22:21:18,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand