/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_stack_longer-1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:38:02,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:38:02,078 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:38:02,082 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:38:02,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:38:02,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:38:02,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:38:02,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:38:02,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:38:02,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:38:02,113 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:38:02,114 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:38:02,114 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:38:02,115 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:38:02,115 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:38:02,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:38:02,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:38:02,116 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:38:02,116 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:38:02,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:38:02,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:38:02,117 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:38:02,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:38:02,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:38:02,118 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:38:02,118 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:38:02,118 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:38:02,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:38:02,119 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:38:02,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:38:02,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:38:02,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:38:02,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:38:02,121 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:38:02,121 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:38:02,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:38:02,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:38:02,122 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:38:02,122 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:38:02,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:38:02,122 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:38:02,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:38:02,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:38:02,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:38:02,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:38:02,385 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:38:02,385 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:38:02,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longer-1_bound2.i [2023-08-04 01:38:03,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:38:03,777 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:38:03,778 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longer-1_bound2.i [2023-08-04 01:38:03,798 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c45b6c1/e9df6afc7b7a41558f06b2b7b0b82e2c/FLAGa2f4ed337 [2023-08-04 01:38:04,092 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c45b6c1/e9df6afc7b7a41558f06b2b7b0b82e2c [2023-08-04 01:38:04,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:38:04,096 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:38:04,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:38:04,101 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:38:04,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:38:04,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3a44c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04, skipping insertion in model container [2023-08-04 01:38:04,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,160 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:38:04,473 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_stack_longer-1_bound2.i[41527,41540] [2023-08-04 01:38:04,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:38:04,518 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:38:04,541 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:38:04,543 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:38:04,551 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-04 01:38:04,557 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_stack_longer-1_bound2.i[41527,41540] [2023-08-04 01:38:04,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:38:04,610 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:38:04,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04 WrapperNode [2023-08-04 01:38:04,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:38:04,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:38:04,612 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:38:04,612 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:38:04,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,664 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 188 [2023-08-04 01:38:04,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:38:04,665 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:38:04,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:38:04,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:38:04,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,679 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,687 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,691 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,693 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:38:04,699 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:38:04,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:38:04,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:38:04,700 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (1/1) ... [2023-08-04 01:38:04,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:38:04,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:38:04,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 01:38:04,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 01:38:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:38:04,769 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:38:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:38:04,769 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:38:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:38:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:38:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:38:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:38:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 01:38:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:38:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:38:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:38:04,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:38:04,772 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 01:38:04,900 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:38:04,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:38:05,141 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:38:05,149 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:38:05,149 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 01:38:05,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:38:05 BoogieIcfgContainer [2023-08-04 01:38:05,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:38:05,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:38:05,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:38:05,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:38:05,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:38:04" (1/3) ... [2023-08-04 01:38:05,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1c5492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:38:05, skipping insertion in model container [2023-08-04 01:38:05,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:04" (2/3) ... [2023-08-04 01:38:05,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1c5492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:38:05, skipping insertion in model container [2023-08-04 01:38:05,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:38:05" (3/3) ... [2023-08-04 01:38:05,159 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack_longer-1_bound2.i [2023-08-04 01:38:05,167 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:38:05,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:38:05,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 01:38:05,176 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:38:05,288 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:38:05,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 188 transitions, 398 flow [2023-08-04 01:38:05,510 INFO L124 PetriNetUnfolderBase]: 37/343 cut-off events. [2023-08-04 01:38:05,510 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:38:05,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 343 events. 37/343 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1484 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 01:38:05,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 188 transitions, 398 flow [2023-08-04 01:38:05,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 188 transitions, 398 flow [2023-08-04 01:38:05,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:38:05,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 188 transitions, 398 flow [2023-08-04 01:38:05,557 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 188 transitions, 398 flow [2023-08-04 01:38:05,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 188 transitions, 398 flow [2023-08-04 01:38:05,602 INFO L124 PetriNetUnfolderBase]: 37/343 cut-off events. [2023-08-04 01:38:05,602 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:38:05,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 343 events. 37/343 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1484 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 01:38:05,615 INFO L119 LiptonReduction]: Number of co-enabled transitions 15606 [2023-08-04 01:38:09,328 INFO L134 LiptonReduction]: Checked pairs total: 21452 [2023-08-04 01:38:09,328 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 01:38:09,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:38:09,354 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;@1e0fa19a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:38:09,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:38:09,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:38:09,359 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-04 01:38:09,359 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:38:09,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:09,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:38:09,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:09,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1195745347, now seen corresponding path program 1 times [2023-08-04 01:38:09,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:09,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189028524] [2023-08-04 01:38:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:09,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:38:09,527 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:38:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:38:09,590 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:38:09,592 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:38:09,594 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:38:09,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:38:09,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:38:09,596 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:38:09,604 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:38:09,605 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:38:09,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:38:09,683 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:38:09,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:38:09,896 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:38:09,897 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:38:09,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6377 event pairs, 2 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:38:09,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:38:09,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 301 transitions, 650 flow [2023-08-04 01:38:09,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:38:09,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:38:09,930 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:38:09,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:38:10,153 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:38:10,154 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:38:10,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6377 event pairs, 2 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:38:10,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-04 01:38:14,896 INFO L134 LiptonReduction]: Checked pairs total: 86921 [2023-08-04 01:38:14,896 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-04 01:38:14,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:38:14,900 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;@1e0fa19a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:38:14,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:38:14,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:38:14,910 INFO L124 PetriNetUnfolderBase]: 9/92 cut-off events. [2023-08-04 01:38:14,910 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 01:38:14,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:14,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:38:14,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:14,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1200336005, now seen corresponding path program 1 times [2023-08-04 01:38:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809352161] [2023-08-04 01:38:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:14,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:38:15,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:15,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809352161] [2023-08-04 01:38:15,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809352161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:38:15,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:38:15,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 01:38:15,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793113218] [2023-08-04 01:38:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:38:15,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:38:15,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:15,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:38:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:38:15,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 567 [2023-08-04 01:38:15,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:15,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:15,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 567 [2023-08-04 01:38:15,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:05,955 INFO L124 PetriNetUnfolderBase]: 690292/869528 cut-off events. [2023-08-04 01:39:05,955 INFO L125 PetriNetUnfolderBase]: For 37819/37819 co-relation queries the response was YES. [2023-08-04 01:39:07,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747068 conditions, 869528 events. 690292/869528 cut-off events. For 37819/37819 co-relation queries the response was YES. Maximal size of possible extension queue 17475. Compared 5401436 event pairs, 265072 based on Foata normal form. 0/629783 useless extension candidates. Maximal degree in co-relation 208978. Up to 857920 conditions per place. [2023-08-04 01:39:09,125 INFO L140 encePairwiseOnDemand]: 563/567 looper letters, 94 selfloop transitions, 5 changer transitions 17/121 dead transitions. [2023-08-04 01:39:09,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 514 flow [2023-08-04 01:39:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:39:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:39:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1445 transitions. [2023-08-04 01:39:09,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097001763668431 [2023-08-04 01:39:09,144 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1445 transitions. [2023-08-04 01:39:09,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1445 transitions. [2023-08-04 01:39:09,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:09,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1445 transitions. [2023-08-04 01:39:09,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:09,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:09,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:09,167 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 5 states and 1445 transitions. [2023-08-04 01:39:09,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 514 flow [2023-08-04 01:39:09,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 508 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:39:09,191 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 171 flow [2023-08-04 01:39:09,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=5, PETRI_FLOW=171, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-08-04 01:39:09,195 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-04 01:39:09,195 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 171 flow [2023-08-04 01:39:09,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:09,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:09,197 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:39:09,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 01:39:09,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:09,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash -299745487, now seen corresponding path program 1 times [2023-08-04 01:39:09,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:09,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261344461] [2023-08-04 01:39:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:09,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:39:09,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261344461] [2023-08-04 01:39:09,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261344461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:09,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:39:09,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:39:09,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576593142] [2023-08-04 01:39:09,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:09,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:39:09,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:39:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:39:09,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 567 [2023-08-04 01:39:09,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:09,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:09,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 567 [2023-08-04 01:39:09,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:23,057 INFO L124 PetriNetUnfolderBase]: 210850/264973 cut-off events. [2023-08-04 01:39:23,057 INFO L125 PetriNetUnfolderBase]: For 4994/4994 co-relation queries the response was YES. [2023-08-04 01:39:23,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533960 conditions, 264973 events. 210850/264973 cut-off events. For 4994/4994 co-relation queries the response was YES. Maximal size of possible extension queue 6408. Compared 1481729 event pairs, 118030 based on Foata normal form. 1/206043 useless extension candidates. Maximal degree in co-relation 52858. Up to 263242 conditions per place. [2023-08-04 01:39:24,407 INFO L140 encePairwiseOnDemand]: 564/567 looper letters, 73 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 01:39:24,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 344 flow [2023-08-04 01:39:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:39:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:39:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 876 transitions. [2023-08-04 01:39:24,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149911816578483 [2023-08-04 01:39:24,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 876 transitions. [2023-08-04 01:39:24,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 876 transitions. [2023-08-04 01:39:24,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:24,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 876 transitions. [2023-08-04 01:39:24,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:24,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:24,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:24,417 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 171 flow. Second operand 3 states and 876 transitions. [2023-08-04 01:39:24,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 344 flow [2023-08-04 01:39:24,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 341 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:39:24,425 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 167 flow [2023-08-04 01:39:24,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-04 01:39:24,426 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-04 01:39:24,426 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 167 flow [2023-08-04 01:39:24,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:24,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:24,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:24,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:39:24,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:24,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1231169122, now seen corresponding path program 1 times [2023-08-04 01:39:24,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:24,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361013824] [2023-08-04 01:39:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:39:24,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361013824] [2023-08-04 01:39:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361013824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:39:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334433863] [2023-08-04 01:39:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:24,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:24,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:24,529 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) [2023-08-04 01:39:24,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 01:39:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:24,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:39:24,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:39:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:39:24,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:39:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:39:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334433863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:39:24,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:39:24,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 01:39:24,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428263087] [2023-08-04 01:39:24,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:39:24,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:39:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:39:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:39:24,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 567 [2023-08-04 01:39:24,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 268.25) internal successors, (1073), 4 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:24,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:24,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 567 [2023-08-04 01:39:24,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:37,099 INFO L124 PetriNetUnfolderBase]: 196460/245688 cut-off events. [2023-08-04 01:39:37,099 INFO L125 PetriNetUnfolderBase]: For 3773/3773 co-relation queries the response was YES. [2023-08-04 01:39:37,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494500 conditions, 245688 events. 196460/245688 cut-off events. For 3773/3773 co-relation queries the response was YES. Maximal size of possible extension queue 6266. Compared 1347871 event pairs, 68420 based on Foata normal form. 11/191020 useless extension candidates. Maximal degree in co-relation 52823. Up to 243813 conditions per place. [2023-08-04 01:39:38,295 INFO L140 encePairwiseOnDemand]: 564/567 looper letters, 94 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-08-04 01:39:38,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 430 flow [2023-08-04 01:39:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:39:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:39:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1162 transitions. [2023-08-04 01:39:38,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2023-08-04 01:39:38,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1162 transitions. [2023-08-04 01:39:38,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1162 transitions. [2023-08-04 01:39:38,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:38,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1162 transitions. [2023-08-04 01:39:38,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:38,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:38,308 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:38,308 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 167 flow. Second operand 4 states and 1162 transitions. [2023-08-04 01:39:38,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 430 flow [2023-08-04 01:39:38,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 102 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:39:38,311 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 164 flow [2023-08-04 01:39:38,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-08-04 01:39:38,312 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-08-04 01:39:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 164 flow [2023-08-04 01:39:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 268.25) internal successors, (1073), 4 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:38,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:38,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:38,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 01:39:38,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:38,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:38,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash 731529002, now seen corresponding path program 1 times [2023-08-04 01:39:38,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:38,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862912311] [2023-08-04 01:39:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:39:38,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:38,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862912311] [2023-08-04 01:39:38,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862912311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:39:38,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51393343] [2023-08-04 01:39:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:38,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:38,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:38,623 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) [2023-08-04 01:39:38,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 01:39:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:38,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:39:38,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:39:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:39:38,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:39:38,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51393343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:38,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:39:38,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:39:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326723031] [2023-08-04 01:39:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:38,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:39:38,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:39:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:39:38,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 567 [2023-08-04 01:39:38,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:38,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:38,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 567 [2023-08-04 01:39:38,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:47,471 INFO L124 PetriNetUnfolderBase]: 130548/165152 cut-off events. [2023-08-04 01:39:47,471 INFO L125 PetriNetUnfolderBase]: For 2027/2027 co-relation queries the response was YES. [2023-08-04 01:39:47,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333092 conditions, 165152 events. 130548/165152 cut-off events. For 2027/2027 co-relation queries the response was YES. Maximal size of possible extension queue 4782. Compared 891625 event pairs, 319 based on Foata normal form. 14520/142109 useless extension candidates. Maximal degree in co-relation 118857. Up to 80432 conditions per place. [2023-08-04 01:39:47,879 INFO L140 encePairwiseOnDemand]: 564/567 looper letters, 0 selfloop transitions, 0 changer transitions 176/176 dead transitions. [2023-08-04 01:39:47,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 176 transitions, 726 flow [2023-08-04 01:39:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:39:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:39:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1502 transitions. [2023-08-04 01:39:47,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298059964726631 [2023-08-04 01:39:47,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1502 transitions. [2023-08-04 01:39:47,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1502 transitions. [2023-08-04 01:39:47,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:47,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1502 transitions. [2023-08-04 01:39:47,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:47,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:47,894 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:47,894 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 164 flow. Second operand 5 states and 1502 transitions. [2023-08-04 01:39:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 176 transitions, 726 flow [2023-08-04 01:39:48,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 176 transitions, 719 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:39:48,165 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 01:39:48,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-04 01:39:48,166 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-04 01:39:48,166 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 01:39:48,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:39:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:39:48,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 01:39:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:48,368 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:39:48,368 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:39:48,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:48,517 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:39:48,517 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:39:48,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6377 event pairs, 2 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:39:48,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:48,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:48,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:39:48,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:48,541 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:48,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:48,674 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:39:48,674 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:39:48,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6377 event pairs, 2 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:39:48,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-04 01:39:52,965 INFO L134 LiptonReduction]: Checked pairs total: 87184 [2023-08-04 01:39:52,966 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-04 01:39:52,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:39:52,969 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;@1e0fa19a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:39:52,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 01:39:52,972 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:39:52,972 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 01:39:52,972 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 01:39:52,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:52,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:52,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:39:52,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash -118648240, now seen corresponding path program 1 times [2023-08-04 01:39:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557013109] [2023-08-04 01:39:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:52,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:39:53,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:53,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557013109] [2023-08-04 01:39:53,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557013109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:53,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:39:53,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:39:53,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253852367] [2023-08-04 01:39:53,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:53,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:39:53,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:39:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:39:53,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 567 [2023-08-04 01:39:53,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:53,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:53,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 567 [2023-08-04 01:39:53,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:41:28,990 INFO L124 PetriNetUnfolderBase]: 1314535/1665442 cut-off events. [2023-08-04 01:41:28,990 INFO L125 PetriNetUnfolderBase]: For 76224/76224 co-relation queries the response was YES. [2023-08-04 01:41:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3340783 conditions, 1665442 events. 1314535/1665442 cut-off events. For 76224/76224 co-relation queries the response was YES. Maximal size of possible extension queue 32936. Compared 11198574 event pairs, 413097 based on Foata normal form. 0/1220870 useless extension candidates. Maximal degree in co-relation 1761655. Up to 885872 conditions per place. [2023-08-04 01:41:41,938 INFO L140 encePairwiseOnDemand]: 558/567 looper letters, 139 selfloop transitions, 7 changer transitions 0/154 dead transitions. [2023-08-04 01:41:41,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 154 transitions, 685 flow [2023-08-04 01:41:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:41:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:41:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 940 transitions. [2023-08-04 01:41:41,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5526161081716637 [2023-08-04 01:41:41,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 940 transitions. [2023-08-04 01:41:41,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 940 transitions. [2023-08-04 01:41:41,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:41:41,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 940 transitions. [2023-08-04 01:41:41,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:41,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:41,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:41,948 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 3 states and 940 transitions. [2023-08-04 01:41:41,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 154 transitions, 685 flow [2023-08-04 01:41:41,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 154 transitions, 685 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:41:41,987 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 270 flow [2023-08-04 01:41:42,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-04 01:41:42,005 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-04 01:41:42,009 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 270 flow [2023-08-04 01:41:42,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:42,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:41:42,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:41:42,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:41:42,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:41:42,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:41:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2032223485, now seen corresponding path program 1 times [2023-08-04 01:41:42,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:41:42,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129846090] [2023-08-04 01:41:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:41:42,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:41:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:41:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:41:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:41:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129846090] [2023-08-04 01:41:42,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129846090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:41:42,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:41:42,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:41:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700462689] [2023-08-04 01:41:42,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:41:42,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:41:42,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:41:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:41:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:41:42,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 567 [2023-08-04 01:41:42,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:42,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:41:42,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 567 [2023-08-04 01:41:42,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:43:37,910 INFO L124 PetriNetUnfolderBase]: 1312639/1658725 cut-off events. [2023-08-04 01:43:37,911 INFO L125 PetriNetUnfolderBase]: For 327231/327452 co-relation queries the response was YES. [2023-08-04 01:43:43,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606193 conditions, 1658725 events. 1312639/1658725 cut-off events. For 327231/327452 co-relation queries the response was YES. Maximal size of possible extension queue 32631. Compared 11032980 event pairs, 743648 based on Foata normal form. 0/1299226 useless extension candidates. Maximal degree in co-relation 620165. Up to 1637628 conditions per place.