/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_ok_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:21:56,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:21:56,906 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:21:56,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:21:56,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:21:56,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:21:56,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:21:56,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:21:56,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:21:56,946 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:21:56,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:21:56,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:21:56,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:21:56,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:21:56,949 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:21:56,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:21:56,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:21:56,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:21:56,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:21:56,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:21:56,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:21:56,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:21:56,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:21:56,951 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:21:56,953 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:21:56,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:21:56,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:21:56,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:21:56,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:21:56,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:21:56,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:21:56,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:21:56,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:21:56,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:21:56,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:21:56,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:21:56,956 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:21:56,956 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:21:56,956 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:21:56,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:21:56,957 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:21:56,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:21:57,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:21:57,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:21:57,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:21:57,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:21:57,222 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:21:57,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_ok_bound2.i [2023-08-03 22:21:58,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:21:58,586 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:21:58,587 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_ok_bound2.i [2023-08-03 22:21:58,600 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8166e054/bafed6fab16a4594a2ca9b5ff904dd70/FLAGb66db50cd [2023-08-03 22:21:58,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8166e054/bafed6fab16a4594a2ca9b5ff904dd70 [2023-08-03 22:21:58,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:21:58,619 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:21:58,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:21:58,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:21:58,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:21:58,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:21:58" (1/1) ... [2023-08-03 22:21:58,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d422d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:58, skipping insertion in model container [2023-08-03 22:21:58,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:21:58" (1/1) ... [2023-08-03 22:21:58,666 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:21:58,994 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_ok_bound2.i[39919,39932] [2023-08-03 22:21:58,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:21:59,017 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:21:59,044 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [218] [2023-08-03 22:21:59,046 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [219] [2023-08-03 22:21:59,053 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [730] [2023-08-03 22:21:59,056 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned long [871] [2023-08-03 22:21:59,063 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_ok_bound2.i[39919,39932] [2023-08-03 22:21:59,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:21:59,114 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:21:59,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59 WrapperNode [2023-08-03 22:21:59,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:21:59,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:21:59,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:21:59,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:21:59,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,186 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 113 [2023-08-03 22:21:59,186 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:21:59,187 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:21:59,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:21:59,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:21:59,194 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,220 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,223 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:21:59,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:21:59,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:21:59,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:21:59,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (1/1) ... [2023-08-03 22:21:59,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:21:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:21:59,252 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 22:21:59,256 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 22:21:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:21:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:21:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-03 22:21:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:21:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 22:21:59,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 22:21:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 22:21:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 22:21:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:21:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:21:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:21:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:21:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:21:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:21:59,290 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 22:21:59,421 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:21:59,423 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:21:59,748 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:21:59,760 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:21:59,761 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-03 22:21:59,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:21:59 BoogieIcfgContainer [2023-08-03 22:21:59,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:21:59,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:21:59,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:21:59,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:21:59,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:21:58" (1/3) ... [2023-08-03 22:21:59,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf62d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:21:59, skipping insertion in model container [2023-08-03 22:21:59,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:21:59" (2/3) ... [2023-08-03 22:21:59,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf62d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:21:59, skipping insertion in model container [2023-08-03 22:21:59,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:21:59" (3/3) ... [2023-08-03 22:21:59,774 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-deagle_arithmetic_prog_ok_bound2.i [2023-08-03 22:21:59,781 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:21:59,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:21:59,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 22:21:59,790 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:21:59,877 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 22:21:59,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-03 22:22:00,048 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-03 22:22:00,048 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 22:22:00,060 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 22:22:00,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 161 transitions, 344 flow [2023-08-03 22:22:00,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 161 transitions, 344 flow [2023-08-03 22:22:00,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:22:00,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-03 22:22:00,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-03 22:22:00,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-03 22:22:00,131 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-03 22:22:00,131 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 22:22:00,133 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 22:22:00,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 6348 [2023-08-03 22:22:05,181 INFO L134 LiptonReduction]: Checked pairs total: 15226 [2023-08-03 22:22:05,182 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-03 22:22:05,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:22:05,199 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;@2cac5e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:22:05,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:22:05,204 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:22:05,204 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-08-03 22:22:05,205 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:22:05,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:05,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:22:05,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:22:05,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash 895305292, now seen corresponding path program 1 times [2023-08-03 22:22:05,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:05,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342685915] [2023-08-03 22:22:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:05,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:22:05,338 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:22:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:22:05,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:22:05,412 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:22:05,413 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:22:05,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:22:05,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:22:05,416 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:22:05,423 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 22:22:05,423 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:22:05,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:22:05,463 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 22:22:05,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:05,580 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:22:05,580 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:22:05,591 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 22:22:05,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:05,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:05,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:22:05,598 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:05,599 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:05,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:05,702 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:22:05,702 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:22:05,711 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 22:22:05,741 INFO L119 LiptonReduction]: Number of co-enabled transitions 18472 [2023-08-03 22:22:10,696 INFO L134 LiptonReduction]: Checked pairs total: 53886 [2023-08-03 22:22:10,696 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-03 22:22:10,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:22:10,699 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;@2cac5e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:22:10,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:22:10,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:22:10,708 INFO L124 PetriNetUnfolderBase]: 14/105 cut-off events. [2023-08-03 22:22:10,708 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-03 22:22:10,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:10,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:22:10,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:22:10,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash -138494713, now seen corresponding path program 1 times [2023-08-03 22:22:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:10,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552018925] [2023-08-03 22:22:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:10,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:10,964 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 22:22:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:10,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552018925] [2023-08-03 22:22:10,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552018925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:22:10,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961454813] [2023-08-03 22:22:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:10,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:22:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:22:10,968 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 22:22:10,969 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 22:22:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:11,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:22:11,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:22:11,131 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 22:22:11,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:22:11,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961454813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:11,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:22:11,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:22:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311036013] [2023-08-03 22:22:11,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:22:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:22:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:22:11,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:22:11,192 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 22:22:11,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:11,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:22:11,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:17,733 INFO L124 PetriNetUnfolderBase]: 63780/90777 cut-off events. [2023-08-03 22:22:17,733 INFO L125 PetriNetUnfolderBase]: For 4403/4403 co-relation queries the response was YES. [2023-08-03 22:22:17,928 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 22:22:18,068 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 52 selfloop transitions, 5 changer transitions 20/99 dead transitions. [2023-08-03 22:22:18,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 392 flow [2023-08-03 22:22:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:22:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:22:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1008 transitions. [2023-08-03 22:22:18,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404825737265415 [2023-08-03 22:22:18,084 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1008 transitions. [2023-08-03 22:22:18,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1008 transitions. [2023-08-03 22:22:18,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:18,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1008 transitions. [2023-08-03 22:22:18,101 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 22:22:18,110 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 22:22:18,116 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 22:22:18,117 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 212 flow. Second operand 5 states and 1008 transitions. [2023-08-03 22:22:18,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 392 flow [2023-08-03 22:22:18,130 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 22:22:18,133 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 155 flow [2023-08-03 22:22:18,135 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 22:22:18,138 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-03 22:22:18,138 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 155 flow [2023-08-03 22:22:18,139 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 22:22:18,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:18,139 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 22:22:18,146 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 22:22:18,345 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 22:22:18,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:22:18,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1833361212, now seen corresponding path program 1 times [2023-08-03 22:22:18,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:18,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646427981] [2023-08-03 22:22:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:18,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:18,427 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 22:22:18,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:18,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646427981] [2023-08-03 22:22:18,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646427981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:18,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:22:18,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:22:18,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607762054] [2023-08-03 22:22:18,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:18,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:22:18,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:18,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:22:18,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:22:18,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:22:18,440 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 22:22:18,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:18,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:22:18,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:19,688 INFO L124 PetriNetUnfolderBase]: 13236/19683 cut-off events. [2023-08-03 22:22:19,688 INFO L125 PetriNetUnfolderBase]: For 644/644 co-relation queries the response was YES. [2023-08-03 22:22:19,719 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 22:22:19,789 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 42 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-03 22:22:19,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 254 flow [2023-08-03 22:22:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:22:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:22:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-03 22:22:19,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379803395889187 [2023-08-03 22:22:19,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-03 22:22:19,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-03 22:22:19,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:19,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-03 22:22:19,794 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 22:22:19,796 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 22:22:19,797 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 22:22:19,797 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 155 flow. Second operand 3 states and 602 transitions. [2023-08-03 22:22:19,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 254 flow [2023-08-03 22:22:19,799 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 22:22:19,800 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 151 flow [2023-08-03 22:22:19,802 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 22:22:19,803 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-08-03 22:22:19,803 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 151 flow [2023-08-03 22:22:19,803 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 22:22:19,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:19,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:22:19,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:22:19,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:22:19,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2070310180, now seen corresponding path program 1 times [2023-08-03 22:22:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:19,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045524846] [2023-08-03 22:22:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:19,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:19,901 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 22:22:19,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045524846] [2023-08-03 22:22:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045524846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:22:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811299798] [2023-08-03 22:22:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:19,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:22:19,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:22:19,907 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 22:22:19,910 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 22:22:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:20,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:22:20,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:22:20,022 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 22:22:20,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:22:20,038 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 22:22:20,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811299798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:22:20,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:22:20,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:22:20,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432185051] [2023-08-03 22:22:20,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:22:20,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:22:20,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:22:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:22:20,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:22:20,057 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 22:22:20,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:20,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:22:20,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:21,087 INFO L124 PetriNetUnfolderBase]: 11584/16956 cut-off events. [2023-08-03 22:22:21,087 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-08-03 22:22:21,123 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 22:22:21,191 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 52 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-03 22:22:21,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 296 flow [2023-08-03 22:22:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:22:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:22:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-08-03 22:22:21,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335120643431636 [2023-08-03 22:22:21,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-08-03 22:22:21,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-08-03 22:22:21,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:21,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-08-03 22:22:21,197 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 22:22:21,200 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 22:22:21,201 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 22:22:21,201 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 151 flow. Second operand 4 states and 796 transitions. [2023-08-03 22:22:21,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 296 flow [2023-08-03 22:22:21,202 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 22:22:21,203 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 148 flow [2023-08-03 22:22:21,203 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 22:22:21,204 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-08-03 22:22:21,204 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 148 flow [2023-08-03 22:22:21,205 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 22:22:21,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:21,205 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:22:21,215 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 22:22:21,410 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 22:22:21,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:22:21,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1340013933, now seen corresponding path program 1 times [2023-08-03 22:22:21,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:21,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020216597] [2023-08-03 22:22:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:21,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:21,528 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 22:22:21,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:21,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020216597] [2023-08-03 22:22:21,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020216597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:22:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123937694] [2023-08-03 22:22:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:21,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:22:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:22:21,531 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 22:22:21,533 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 22:22:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:21,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:22:21,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:22:21,672 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 22:22:21,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:22:21,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123937694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:21,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:22:21,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 22:22:21,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316075516] [2023-08-03 22:22:21,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:21,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:22:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:21,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:22:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:22:21,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:22:21,690 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 22:22:21,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:21,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:22:21,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:22,316 INFO L124 PetriNetUnfolderBase]: 8009/10984 cut-off events. [2023-08-03 22:22:22,317 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-08-03 22:22:22,349 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 22:22:22,357 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-08-03 22:22:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 114 transitions, 444 flow [2023-08-03 22:22:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:22:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:22:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1018 transitions. [2023-08-03 22:22:22,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458445040214477 [2023-08-03 22:22:22,360 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1018 transitions. [2023-08-03 22:22:22,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1018 transitions. [2023-08-03 22:22:22,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:22,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1018 transitions. [2023-08-03 22:22:22,364 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 22:22:22,367 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 22:22:22,368 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 22:22:22,368 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 148 flow. Second operand 5 states and 1018 transitions. [2023-08-03 22:22:22,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 114 transitions, 444 flow [2023-08-03 22:22:22,373 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 22:22:22,374 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-03 22:22:22,374 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 22:22:22,375 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-08-03 22:22:22,375 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-03 22:22:22,375 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 22:22:22,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:22:22,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:22:22,385 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 22:22:22,581 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 22:22:22,581 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 22:22:22,582 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 22:22:22,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:22,681 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:22:22,682 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:22:22,691 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 22:22:22,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:22,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:22,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:22:22,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:22,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:22,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-03 22:22:22,785 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-03 22:22:22,785 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 22:22:22,794 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 22:22:22,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 18472 [2023-08-03 22:22:27,874 INFO L134 LiptonReduction]: Checked pairs total: 53531 [2023-08-03 22:22:27,874 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-03 22:22:27,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:22:27,883 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;@2cac5e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:22:27,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:22:27,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:22:27,886 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-03 22:22:27,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:22:27,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:27,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 22:22:27,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:22:27,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 930402596, now seen corresponding path program 1 times [2023-08-03 22:22:27,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:27,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705626886] [2023-08-03 22:22:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:22:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:27,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705626886] [2023-08-03 22:22:27,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705626886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:27,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:22:27,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:22:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522066243] [2023-08-03 22:22:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:22:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:22:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:22:27,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:22:27,963 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 22:22:27,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:27,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:22:27,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:32,582 INFO L124 PetriNetUnfolderBase]: 63602/91760 cut-off events. [2023-08-03 22:22:32,582 INFO L125 PetriNetUnfolderBase]: For 4662/4662 co-relation queries the response was YES. [2023-08-03 22:22:32,847 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 22:22:33,221 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 57 selfloop transitions, 2 changer transitions 4/86 dead transitions. [2023-08-03 22:22:33,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 342 flow [2023-08-03 22:22:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:22:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:22:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-03 22:22:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585344057193923 [2023-08-03 22:22:33,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-03 22:22:33,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-03 22:22:33,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:33,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-03 22:22:33,231 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 22:22:33,233 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 22:22:33,234 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 22:22:33,234 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 212 flow. Second operand 3 states and 625 transitions. [2023-08-03 22:22:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 342 flow [2023-08-03 22:22:33,238 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 22:22:33,239 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 200 flow [2023-08-03 22:22:33,239 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 22:22:33,240 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-03 22:22:33,240 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 200 flow [2023-08-03 22:22:33,240 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 22:22:33,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:33,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:22:33,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:22:33,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:22:33,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1140183451, now seen corresponding path program 1 times [2023-08-03 22:22:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:33,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886893390] [2023-08-03 22:22:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:33,295 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 22:22:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886893390] [2023-08-03 22:22:33,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886893390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:22:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987619564] [2023-08-03 22:22:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:33,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:22:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:22:33,298 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 22:22:33,300 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 22:22:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:33,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:22:33,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:22:33,394 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 22:22:33,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:22:33,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987619564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:33,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:22:33,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:22:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636260094] [2023-08-03 22:22:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:33,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:22:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:22:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:22:33,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:22:33,406 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 22:22:33,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:33,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:22:33,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:38,042 INFO L124 PetriNetUnfolderBase]: 56012/78692 cut-off events. [2023-08-03 22:22:38,042 INFO L125 PetriNetUnfolderBase]: For 3905/3905 co-relation queries the response was YES. [2023-08-03 22:22:38,198 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 22:22:38,392 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 70 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-03 22:22:38,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 384 flow [2023-08-03 22:22:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:22:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:22:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-08-03 22:22:38,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630026809651475 [2023-08-03 22:22:38,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-08-03 22:22:38,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-08-03 22:22:38,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:38,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-08-03 22:22:38,396 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 22:22:38,397 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 22:22:38,398 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 22:22:38,398 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 200 flow. Second operand 3 states and 630 transitions. [2023-08-03 22:22:38,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 384 flow [2023-08-03 22:22:38,407 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 22:22:38,408 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 204 flow [2023-08-03 22:22:38,409 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 22:22:38,409 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-03 22:22:38,409 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 204 flow [2023-08-03 22:22:38,410 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 22:22:38,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:38,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:22:38,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 22:22:38,614 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 22:22:38,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:22:38,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash 560919991, now seen corresponding path program 1 times [2023-08-03 22:22:38,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:38,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458190400] [2023-08-03 22:22:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:38,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:38,659 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 22:22:38,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458190400] [2023-08-03 22:22:38,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458190400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:22:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576145421] [2023-08-03 22:22:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:22:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:22:38,661 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 22:22:38,664 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 22:22:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:38,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:22:38,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:22:38,757 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 22:22:38,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:22:38,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576145421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:38,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:22:38,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:22:38,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790620077] [2023-08-03 22:22:38,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:38,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:22:38,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:38,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:22:38,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:22:38,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:22:38,766 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 22:22:38,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:38,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:22:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:41,622 INFO L124 PetriNetUnfolderBase]: 41376/57096 cut-off events. [2023-08-03 22:22:41,622 INFO L125 PetriNetUnfolderBase]: For 3396/3396 co-relation queries the response was YES. [2023-08-03 22:22:41,730 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 22:22:41,909 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 82 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-03 22:22:41,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 444 flow [2023-08-03 22:22:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:22:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:22:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-03 22:22:41,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-03 22:22:41,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-03 22:22:41,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-03 22:22:41,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:41,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-03 22:22:41,913 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 22:22:41,914 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 22:22:41,915 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 22:22:41,915 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 204 flow. Second operand 3 states and 641 transitions. [2023-08-03 22:22:41,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 444 flow [2023-08-03 22:22:41,917 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 22:22:41,920 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 214 flow [2023-08-03 22:22:41,920 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 22:22:41,921 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-03 22:22:41,921 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 214 flow [2023-08-03 22:22:41,921 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 22:22:41,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:41,921 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 22:22:41,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 22:22:42,126 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 22:22:42,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:22:42,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:42,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1776832383, now seen corresponding path program 1 times [2023-08-03 22:22:42,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:42,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549421516] [2023-08-03 22:22:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:42,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:42,174 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 22:22:42,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:42,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549421516] [2023-08-03 22:22:42,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549421516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:42,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:22:42,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:22:42,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418226354] [2023-08-03 22:22:42,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:42,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:22:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:22:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:22:42,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:22:42,183 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 22:22:42,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:42,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:22:42,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:47,277 INFO L124 PetriNetUnfolderBase]: 63301/92856 cut-off events. [2023-08-03 22:22:47,278 INFO L125 PetriNetUnfolderBase]: For 15987/15987 co-relation queries the response was YES. [2023-08-03 22:22:47,488 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 22:22:47,745 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 100 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-08-03 22:22:47,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 563 flow [2023-08-03 22:22:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:22:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:22:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-03 22:22:47,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853440571939231 [2023-08-03 22:22:47,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-03 22:22:47,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-03 22:22:47,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:47,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-03 22:22:47,749 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 22:22:47,751 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 22:22:47,751 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 22:22:47,751 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 214 flow. Second operand 3 states and 655 transitions. [2023-08-03 22:22:47,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 563 flow [2023-08-03 22:22:47,857 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 22:22:47,858 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 224 flow [2023-08-03 22:22:47,858 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 22:22:47,859 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-03 22:22:47,859 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 224 flow [2023-08-03 22:22:47,859 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 22:22:47,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:47,859 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 22:22:47,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 22:22:47,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:22:47,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2062271318, now seen corresponding path program 1 times [2023-08-03 22:22:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:47,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332038348] [2023-08-03 22:22:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:47,908 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 22:22:47,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332038348] [2023-08-03 22:22:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332038348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:22:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763707106] [2023-08-03 22:22:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:47,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:22:47,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:22:47,914 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 22:22:47,916 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 22:22:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:48,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:22:48,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:22:48,037 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 22:22:48,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:22:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763707106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:48,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:22:48,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:22:48,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970318188] [2023-08-03 22:22:48,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:48,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:22:48,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:22:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:22:48,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:22:48,052 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 22:22:48,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:48,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:22:48,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:22:56,121 INFO L124 PetriNetUnfolderBase]: 86287/138754 cut-off events. [2023-08-03 22:22:56,121 INFO L125 PetriNetUnfolderBase]: For 29092/29092 co-relation queries the response was YES. [2023-08-03 22:22:56,459 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 22:22:56,815 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 95 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-03 22:22:56,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 544 flow [2023-08-03 22:22:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:22:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:22:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-03 22:22:56,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579982126899017 [2023-08-03 22:22:56,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-03 22:22:56,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-03 22:22:56,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:22:56,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-03 22:22:56,819 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 22:22:56,820 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 22:22:56,821 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 22:22:56,821 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 224 flow. Second operand 3 states and 649 transitions. [2023-08-03 22:22:56,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 544 flow [2023-08-03 22:22:56,874 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 22:22:56,875 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 234 flow [2023-08-03 22:22:56,875 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 22:22:56,876 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-03 22:22:56,876 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 234 flow [2023-08-03 22:22:56,876 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 22:22:56,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:22:56,877 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 22:22:56,882 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 22:22:57,078 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 22:22:57,079 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:22:57,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:22:57,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1717975363, now seen corresponding path program 1 times [2023-08-03 22:22:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:22:57,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631216513] [2023-08-03 22:22:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:22:57,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:22:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:22:57,131 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 22:22:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:22:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631216513] [2023-08-03 22:22:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631216513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:22:57,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:22:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:22:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643816546] [2023-08-03 22:22:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:22:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:22:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:22:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:22:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:22:57,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:22:57,139 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 22:22:57,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:22:57,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:22:57,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:23:08,363 INFO L124 PetriNetUnfolderBase]: 127582/183524 cut-off events. [2023-08-03 22:23:08,363 INFO L125 PetriNetUnfolderBase]: For 58795/58795 co-relation queries the response was YES. [2023-08-03 22:23:08,855 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 22:23:09,387 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 101 selfloop transitions, 2 changer transitions 1/127 dead transitions. [2023-08-03 22:23:09,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 599 flow [2023-08-03 22:23:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:23:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:23:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-03 22:23:09,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844504021447721 [2023-08-03 22:23:09,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-03 22:23:09,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-03 22:23:09,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:23:09,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-03 22:23:09,391 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 22:23:09,393 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 22:23:09,393 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 22:23:09,393 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 234 flow. Second operand 3 states and 654 transitions. [2023-08-03 22:23:09,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 599 flow [2023-08-03 22:23:09,508 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 22:23:09,510 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 244 flow [2023-08-03 22:23:09,510 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 22:23:09,510 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-08-03 22:23:09,511 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 244 flow [2023-08-03 22:23:09,511 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 22:23:09,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:23:09,511 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 22:23:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 22:23:09,511 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:23:09,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:23:09,512 INFO L85 PathProgramCache]: Analyzing trace with hash -757510222, now seen corresponding path program 1 times [2023-08-03 22:23:09,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:23:09,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784071874] [2023-08-03 22:23:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:23:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:23:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:23:09,558 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 22:23:09,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:23:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784071874] [2023-08-03 22:23:09,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784071874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:23:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119096170] [2023-08-03 22:23:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:23:09,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:23:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:23:09,562 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 22:23:09,565 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 22:23:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:23:09,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:23:09,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:23:09,676 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 22:23:09,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:23:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119096170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:23:09,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:23:09,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:23:09,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992418460] [2023-08-03 22:23:09,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:23:09,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:23:09,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:23:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:23:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:23:09,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:23:09,686 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 22:23:09,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:23:09,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:23:09,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:23:19,510 INFO L124 PetriNetUnfolderBase]: 117811/162304 cut-off events. [2023-08-03 22:23:19,510 INFO L125 PetriNetUnfolderBase]: For 64190/64190 co-relation queries the response was YES. [2023-08-03 22:23:19,991 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 22:23:20,679 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 89 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-08-03 22:23:20,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 530 flow [2023-08-03 22:23:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:23:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:23:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-03 22:23:20,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-03 22:23:20,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-03 22:23:20,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-03 22:23:20,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:23:20,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-03 22:23:20,683 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 22:23:20,685 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 22:23:20,685 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 22:23:20,685 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 244 flow. Second operand 3 states and 641 transitions. [2023-08-03 22:23:20,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 530 flow [2023-08-03 22:23:20,844 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 22:23:20,845 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 254 flow [2023-08-03 22:23:20,845 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 22:23:20,845 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2023-08-03 22:23:20,845 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 254 flow [2023-08-03 22:23:20,846 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 22:23:20,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:23:20,846 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 22:23:20,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 22:23:21,051 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 22:23:21,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:23:21,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:23:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1568484559, now seen corresponding path program 1 times [2023-08-03 22:23:21,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:23:21,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531898577] [2023-08-03 22:23:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:23:21,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:23:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:23:21,123 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 22:23:21,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:23:21,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531898577] [2023-08-03 22:23:21,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531898577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:23:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984830134] [2023-08-03 22:23:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:23:21,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:23:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:23:21,125 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 22:23:21,128 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 22:23:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:23:21,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:23:21,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:23:21,252 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 22:23:21,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:23:21,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984830134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:23:21,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:23:21,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:23:21,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657772413] [2023-08-03 22:23:21,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:23:21,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:23:21,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:23:21,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:23:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:23:21,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-03 22:23:21,266 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 22:23:21,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:23:21,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-03 22:23:21,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:23:36,790 INFO L124 PetriNetUnfolderBase]: 166284/244318 cut-off events. [2023-08-03 22:23:36,790 INFO L125 PetriNetUnfolderBase]: For 89414/89414 co-relation queries the response was YES. [2023-08-03 22:23:37,629 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 22:23:38,342 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 98 selfloop transitions, 2 changer transitions 1/124 dead transitions. [2023-08-03 22:23:38,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 604 flow [2023-08-03 22:23:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:23:38,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:23:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-03 22:23:38,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579088471849866 [2023-08-03 22:23:38,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-03 22:23:38,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-03 22:23:38,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:23:38,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-03 22:23:38,345 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 22:23:38,347 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 22:23:38,347 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 22:23:38,347 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 254 flow. Second operand 3 states and 648 transitions. [2023-08-03 22:23:38,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 604 flow [2023-08-03 22:23:40,430 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 22:23:40,431 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 264 flow [2023-08-03 22:23:40,431 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 22:23:40,432 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 12 predicate places. [2023-08-03 22:23:40,432 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 264 flow [2023-08-03 22:23:40,432 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 22:23:40,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:23:40,432 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 22:23:40,437 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 22:23:40,633 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 22:23:40,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:23:40,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:23:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1444264762, now seen corresponding path program 1 times [2023-08-03 22:23:40,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:23:40,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955471984] [2023-08-03 22:23:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:23:40,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:23:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:23:40,706 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 22:23:40,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:23:40,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955471984] [2023-08-03 22:23:40,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955471984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:23:40,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728929166] [2023-08-03 22:23:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:23:40,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:23:40,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:23:40,709 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 22:23:40,711 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 22:23:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:23:40,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:23:40,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:23:40,842 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 22:23:40,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:23:40,863 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 22:23:40,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728929166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:23:40,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:23:40,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:23:40,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032006742] [2023-08-03 22:23:40,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:23:40,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:23:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:23:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:23:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:23:40,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:23:40,881 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 22:23:40,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:23:40,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:23:40,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:23:56,381 INFO L124 PetriNetUnfolderBase]: 156019/217570 cut-off events. [2023-08-03 22:23:56,381 INFO L125 PetriNetUnfolderBase]: For 90002/90002 co-relation queries the response was YES. [2023-08-03 22:23:57,120 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 22:23:58,007 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 78 selfloop transitions, 3 changer transitions 1/105 dead transitions. [2023-08-03 22:23:58,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 498 flow [2023-08-03 22:23:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:23:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:23:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 813 transitions. [2023-08-03 22:23:58,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449061662198391 [2023-08-03 22:23:58,009 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 813 transitions. [2023-08-03 22:23:58,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 813 transitions. [2023-08-03 22:23:58,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:23:58,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 813 transitions. [2023-08-03 22:23:58,011 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 22:23:58,013 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 22:23:58,013 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 22:23:58,014 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 264 flow. Second operand 4 states and 813 transitions. [2023-08-03 22:23:58,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 498 flow [2023-08-03 22:23:59,917 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 22:23:59,918 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 276 flow [2023-08-03 22:23:59,918 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 22:23:59,918 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-03 22:23:59,919 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 276 flow [2023-08-03 22:23:59,919 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 22:23:59,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:23:59,919 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 22:23:59,923 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 22:24:00,120 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 22:24:00,121 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:24:00,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:24:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1788429010, now seen corresponding path program 1 times [2023-08-03 22:24:00,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:24:00,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356678022] [2023-08-03 22:24:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:24:00,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:24:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:24:00,192 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 22:24:00,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:24:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356678022] [2023-08-03 22:24:00,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356678022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:24:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567082046] [2023-08-03 22:24:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:24:00,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:24:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:24:00,194 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 22:24:00,200 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 22:24:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:24:00,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:24:00,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:24:00,368 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 22:24:00,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:24:00,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567082046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:24:00,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:24:00,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 22:24:00,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728605549] [2023-08-03 22:24:00,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:24:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:24:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:24:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:24:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:24:00,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:24:00,377 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 22:24:00,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:24:00,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:24:00,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:24:14,754 INFO L124 PetriNetUnfolderBase]: 156627/217169 cut-off events. [2023-08-03 22:24:14,754 INFO L125 PetriNetUnfolderBase]: For 85590/85590 co-relation queries the response was YES. [2023-08-03 22:24:15,528 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 22:24:16,180 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 100 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2023-08-03 22:24:16,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 634 flow [2023-08-03 22:24:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:24:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:24:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-03 22:24:16,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764075067024129 [2023-08-03 22:24:16,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-03 22:24:16,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-03 22:24:16,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:24:16,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-03 22:24:16,183 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 22:24:16,184 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 22:24:16,184 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 22:24:16,184 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 276 flow. Second operand 3 states and 645 transitions. [2023-08-03 22:24:16,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 634 flow [2023-08-03 22:24:17,975 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 22:24:17,976 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 286 flow [2023-08-03 22:24:17,977 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 22:24:17,977 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-03 22:24:17,977 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 286 flow [2023-08-03 22:24:17,977 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 22:24:17,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:24:17,978 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 22:24:17,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 22:24:18,182 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 22:24:18,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:24:18,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:24:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1264143634, now seen corresponding path program 1 times [2023-08-03 22:24:18,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:24:18,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163869020] [2023-08-03 22:24:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:24:18,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:24:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:24:18,237 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 22:24:18,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:24:18,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163869020] [2023-08-03 22:24:18,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163869020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:24:18,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858269041] [2023-08-03 22:24:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:24:18,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:24:18,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:24:18,240 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 22:24:18,273 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 22:24:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:24:18,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:24:18,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:24:18,385 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 22:24:18,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:24:18,409 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 22:24:18,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858269041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:24:18,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:24:18,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-03 22:24:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804286377] [2023-08-03 22:24:18,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:24:18,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 22:24:18,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:24:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 22:24:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 22:24:18,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-03 22:24:18,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 191.28571428571428) internal successors, (1339), 7 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states 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 22:24:18,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:24:18,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-03 22:24:18,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:24:49,898 INFO L124 PetriNetUnfolderBase]: 281022/419575 cut-off events. [2023-08-03 22:24:49,898 INFO L125 PetriNetUnfolderBase]: For 164023/164023 co-relation queries the response was YES. [2023-08-03 22:24:51,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947034 conditions, 419575 events. 281022/419575 cut-off events. For 164023/164023 co-relation queries the response was YES. Maximal size of possible extension queue 7960. Compared 3729749 event pairs, 44158 based on Foata normal form. 12240/410860 useless extension candidates. Maximal degree in co-relation 814895. Up to 78510 conditions per place. [2023-08-03 22:24:53,050 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 267 selfloop transitions, 6 changer transitions 0/296 dead transitions. [2023-08-03 22:24:53,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 296 transitions, 1640 flow [2023-08-03 22:24:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:24:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:24:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1341 transitions. [2023-08-03 22:24:53,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599195710455764 [2023-08-03 22:24:53,053 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1341 transitions. [2023-08-03 22:24:53,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1341 transitions. [2023-08-03 22:24:53,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:24:53,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1341 transitions. [2023-08-03 22:24:53,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.5) internal successors, (1341), 6 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states 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 22:24:53,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 22:24:53,059 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 22:24:53,059 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 286 flow. Second operand 6 states and 1341 transitions. [2023-08-03 22:24:53,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 296 transitions, 1640 flow [2023-08-03 22:24:54,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 296 transitions, 1629 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:24:54,827 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 323 flow [2023-08-03 22:24:54,827 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=6, PETRI_FLOW=323, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2023-08-03 22:24:54,827 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 24 predicate places. [2023-08-03 22:24:54,828 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 323 flow [2023-08-03 22:24:54,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 191.28571428571428) internal successors, (1339), 7 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states 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 22:24:54,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:24:54,839 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 22:24:54,843 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 22:24:55,039 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 22:24:55,039 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:24:55,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:24:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash 289321484, now seen corresponding path program 1 times [2023-08-03 22:24:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:24:55,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623877852] [2023-08-03 22:24:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:24:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:24:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:24:55,098 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 22:24:55,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:24:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623877852] [2023-08-03 22:24:55,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623877852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:24:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418512136] [2023-08-03 22:24:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:24:55,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:24:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:24:55,101 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 22:24:55,114 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 22:24:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:24:55,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:24:55,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:24:55,262 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 22:24:55,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:24:55,282 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 22:24:55,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418512136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:24:55,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:24:55,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-03 22:24:55,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787428677] [2023-08-03 22:24:55,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:24:55,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:24:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:24:55,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:24:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:24:55,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 373 [2023-08-03 22:24:55,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 323 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 22:24:55,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:24:55,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 373 [2023-08-03 22:24:55,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:25:41,540 INFO L124 PetriNetUnfolderBase]: 366032/517627 cut-off events. [2023-08-03 22:25:41,540 INFO L125 PetriNetUnfolderBase]: For 392479/392479 co-relation queries the response was YES. [2023-08-03 22:25:43,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276684 conditions, 517627 events. 366032/517627 cut-off events. For 392479/392479 co-relation queries the response was YES. Maximal size of possible extension queue 9249. Compared 4239197 event pairs, 60666 based on Foata normal form. 8091/506928 useless extension candidates. Maximal degree in co-relation 1110075. Up to 161234 conditions per place. [2023-08-03 22:25:45,841 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 316 selfloop transitions, 18 changer transitions 3/360 dead transitions. [2023-08-03 22:25:45,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 360 transitions, 2163 flow [2023-08-03 22:25:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-03 22:25:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-03 22:25:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2083 transitions. [2023-08-03 22:25:45,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584450402144772 [2023-08-03 22:25:45,844 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2083 transitions. [2023-08-03 22:25:45,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2083 transitions. [2023-08-03 22:25:45,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:25:45,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2083 transitions. [2023-08-03 22:25:45,847 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 22:25:45,851 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 22:25:45,851 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 22:25:45,851 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 323 flow. Second operand 10 states and 2083 transitions. [2023-08-03 22:25:45,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 360 transitions, 2163 flow [2023-08-03 22:25:56,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 360 transitions, 2091 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-03 22:25:56,107 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 463 flow [2023-08-03 22:25:56,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=463, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2023-08-03 22:25:56,108 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 39 predicate places. [2023-08-03 22:25:56,108 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 463 flow [2023-08-03 22:25:56,108 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 22:25:56,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:25:56,108 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 22:25:56,113 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 22:25:56,308 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 22:25:56,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:25:56,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:25:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash 915188470, now seen corresponding path program 1 times [2023-08-03 22:25:56,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:25:56,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843274195] [2023-08-03 22:25:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:25:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:25:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:25:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 22:25:56,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:25:56,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843274195] [2023-08-03 22:25:56,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843274195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:25:56,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:25:56,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:25:56,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464511726] [2023-08-03 22:25:56,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:25:56,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:25:56,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:25:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:25:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:25:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 373 [2023-08-03 22:25:56,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 463 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 22:25:56,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:25:56,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 373 [2023-08-03 22:25:56,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand