/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-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:37:51,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:37:51,323 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:37:51,326 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:37:51,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:37:51,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:37:51,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:37:51,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:37:51,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:37:51,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:37:51,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:37:51,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:37:51,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:37:51,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:37:51,356 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:37:51,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:37:51,356 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:37:51,356 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:37:51,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:37:51,358 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:37:51,358 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:37:51,358 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:37:51,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:37:51,358 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:37:51,359 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:37:51,360 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:37:51,360 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:37:51,361 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:37:51,361 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:37:51,361 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:37:51,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:37:51,362 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:37:51,362 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:37:51,362 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:37:51,362 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:37:51,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:37:51,362 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:37:51,363 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:37:51,363 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:37:51,363 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:37:51,363 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:37:51,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:37:51,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:37:51,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:37:51,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:37:51,605 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:37:51,605 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:37:51,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-2_bound2.i [2023-08-04 01:37:52,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:37:52,878 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:37:52,879 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-2_bound2.i [2023-08-04 01:37:52,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c4d62d6/0a63d70f209f4535af4d617ef64b8d0b/FLAG3efc86640 [2023-08-04 01:37:52,904 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c4d62d6/0a63d70f209f4535af4d617ef64b8d0b [2023-08-04 01:37:52,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:37:52,907 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:37:52,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:37:52,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:37:52,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:37:52,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:37:52" (1/1) ... [2023-08-04 01:37:52,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab94d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:52, skipping insertion in model container [2023-08-04 01:37:52,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:37:52" (1/1) ... [2023-08-04 01:37:52,969 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:37:53,306 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-2_bound2.i[41520,41533] [2023-08-04 01:37:53,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:37:53,338 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:37:53,358 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:37:53,359 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:37:53,364 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-04 01:37:53,374 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-2_bound2.i[41520,41533] [2023-08-04 01:37:53,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:37:53,433 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:37:53,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53 WrapperNode [2023-08-04 01:37:53,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:37:53,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:37:53,436 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:37:53,436 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:37:53,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,486 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 192 [2023-08-04 01:37:53,486 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:37:53,487 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:37:53,487 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:37:53,487 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:37:53,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,516 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:37:53,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:37:53,539 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:37:53,539 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:37:53,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (1/1) ... [2023-08-04 01:37:53,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:37:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:37:53,585 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 01:37:53,624 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 01:37:53,646 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:37:53,646 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:37:53,646 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:37:53,647 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:37:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:37:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:37:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:37:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:37:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 01:37:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:37:53,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:37:53,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:37:53,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:37:53,650 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 01:37:53,759 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:37:53,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:37:54,057 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:37:54,063 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:37:54,064 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 01:37:54,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:37:54 BoogieIcfgContainer [2023-08-04 01:37:54,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:37:54,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:37:54,067 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:37:54,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:37:54,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:37:52" (1/3) ... [2023-08-04 01:37:54,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a7c3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:37:54, skipping insertion in model container [2023-08-04 01:37:54,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:53" (2/3) ... [2023-08-04 01:37:54,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a7c3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:37:54, skipping insertion in model container [2023-08-04 01:37:54,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:37:54" (3/3) ... [2023-08-04 01:37:54,071 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack-2_bound2.i [2023-08-04 01:37:54,078 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:37:54,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:37:54,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 01:37:54,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:37:54,146 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:37:54,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 01:37:54,245 INFO L124 PetriNetUnfolderBase]: 37/347 cut-off events. [2023-08-04 01:37:54,245 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:37:54,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 347 events. 37/347 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. 0/301 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 01:37:54,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 01:37:54,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 192 transitions, 406 flow [2023-08-04 01:37:54,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:37:54,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 192 transitions, 406 flow [2023-08-04 01:37:54,268 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 192 transitions, 406 flow [2023-08-04 01:37:54,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 01:37:54,316 INFO L124 PetriNetUnfolderBase]: 37/347 cut-off events. [2023-08-04 01:37:54,316 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:37:54,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 347 events. 37/347 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. 0/301 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 01:37:54,330 INFO L119 LiptonReduction]: Number of co-enabled transitions 15606 [2023-08-04 01:37:57,736 INFO L134 LiptonReduction]: Checked pairs total: 22324 [2023-08-04 01:37:57,736 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-04 01:37:57,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:37:57,755 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;@7d93ac04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:37:57,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:37:57,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:37:57,763 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-04 01:37:57,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:37:57,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:37:57,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:37:57,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:37:57,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:37:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1515538441, now seen corresponding path program 1 times [2023-08-04 01:37:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:37:57,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222621647] [2023-08-04 01:37:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:37:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:37:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:37:57,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:37:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:37:57,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:37:57,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:37:57,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:37:57,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:37:57,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:37:57,894 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:37:57,896 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:37:57,896 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:37:57,896 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:37:57,930 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:37:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 01:37:58,056 INFO L124 PetriNetUnfolderBase]: 141/1027 cut-off events. [2023-08-04 01:37:58,056 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:37:58,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1027 events. 141/1027 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6407 event pairs, 1 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-04 01:37:58,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 01:37:58,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 305 transitions, 658 flow [2023-08-04 01:37:58,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:37:58,077 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 305 transitions, 658 flow [2023-08-04 01:37:58,078 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 305 transitions, 658 flow [2023-08-04 01:37:58,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 01:37:58,176 INFO L124 PetriNetUnfolderBase]: 141/1027 cut-off events. [2023-08-04 01:37:58,177 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:37:58,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1027 events. 141/1027 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6407 event pairs, 1 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-04 01:37:58,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-04 01:38:02,241 INFO L134 LiptonReduction]: Checked pairs total: 88775 [2023-08-04 01:38:02,241 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-08-04 01:38:02,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:38:02,243 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;@7d93ac04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:38:02,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:38:02,252 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:38:02,253 INFO L124 PetriNetUnfolderBase]: 9/92 cut-off events. [2023-08-04 01:38:02,253 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 01:38:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:02,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:38:02,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:02,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1013953888, now seen corresponding path program 1 times [2023-08-04 01:38:02,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146362578] [2023-08-04 01:38:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:38:02,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:02,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146362578] [2023-08-04 01:38:02,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146362578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:38:02,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141250084] [2023-08-04 01:38:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:02,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:38:02,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:38:02,472 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 01:38:02,473 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 01:38:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:02,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:38:02,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:38:02,600 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 01:38:02,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:38:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141250084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:38:02,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:38:02,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:38:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357300838] [2023-08-04 01:38:02,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:38:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:38:02,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:38:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:38:02,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 576 [2023-08-04 01:38:02,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 271.6) internal successors, (1358), 5 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states 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 01:38:02,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:02,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 576 [2023-08-04 01:38:02,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:38:47,799 INFO L124 PetriNetUnfolderBase]: 688876/868182 cut-off events. [2023-08-04 01:38:47,799 INFO L125 PetriNetUnfolderBase]: For 37543/37543 co-relation queries the response was YES. [2023-08-04 01:38:49,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1744066 conditions, 868182 events. 688876/868182 cut-off events. For 37543/37543 co-relation queries the response was YES. Maximal size of possible extension queue 18740. Compared 5470150 event pairs, 264462 based on Foata normal form. 0/613197 useless extension candidates. Maximal degree in co-relation 229448. Up to 856076 conditions per place. [2023-08-04 01:38:50,937 INFO L140 encePairwiseOnDemand]: 572/576 looper letters, 93 selfloop transitions, 5 changer transitions 17/120 dead transitions. [2023-08-04 01:38:50,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 510 flow [2023-08-04 01:38:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:38:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:38:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1464 transitions. [2023-08-04 01:38:50,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2023-08-04 01:38:50,951 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1464 transitions. [2023-08-04 01:38:50,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1464 transitions. [2023-08-04 01:38:50,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:38:50,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1464 transitions. [2023-08-04 01:38:50,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 292.8) internal successors, (1464), 5 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states 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 01:38:50,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states 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 01:38:50,975 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states 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 01:38:50,976 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 5 states and 1464 transitions. [2023-08-04 01:38:50,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 510 flow [2023-08-04 01:38:51,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 120 transitions, 504 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:38:51,004 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 171 flow [2023-08-04 01:38:51,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, 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 01:38:51,007 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-04 01:38:51,007 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 171 flow [2023-08-04 01:38:51,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.6) internal successors, (1358), 5 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states 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 01:38:51,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:51,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:38:51,016 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 01:38:51,216 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 [2023-08-04 01:38:51,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:51,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1915053778, now seen corresponding path program 1 times [2023-08-04 01:38:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:51,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366392040] [2023-08-04 01:38:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:51,263 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 01:38:51,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:51,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366392040] [2023-08-04 01:38:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366392040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:38:51,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:38:51,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:38:51,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313903853] [2023-08-04 01:38:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:38:51,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:38:51,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:38:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:38:51,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 576 [2023-08-04 01:38:51,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 01:38:51,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:51,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 576 [2023-08-04 01:38:51,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:03,883 INFO L124 PetriNetUnfolderBase]: 209578/263412 cut-off events. [2023-08-04 01:39:03,884 INFO L125 PetriNetUnfolderBase]: For 4970/4970 co-relation queries the response was YES. [2023-08-04 01:39:04,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530643 conditions, 263412 events. 209578/263412 cut-off events. For 4970/4970 co-relation queries the response was YES. Maximal size of possible extension queue 6720. Compared 1488904 event pairs, 117840 based on Foata normal form. 1/199911 useless extension candidates. Maximal degree in co-relation 58066. Up to 261537 conditions per place. [2023-08-04 01:39:05,241 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 72 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 01:39:05,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 340 flow [2023-08-04 01:39:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:39:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:39:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 887 transitions. [2023-08-04 01:39:05,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133101851851852 [2023-08-04 01:39:05,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 887 transitions. [2023-08-04 01:39:05,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 887 transitions. [2023-08-04 01:39:05,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:05,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 887 transitions. [2023-08-04 01:39:05,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 0 states have call successors, (0), 0 states 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 01:39:05,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states 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 01:39:05,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states 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 01:39:05,250 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 171 flow. Second operand 3 states and 887 transitions. [2023-08-04 01:39:05,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 340 flow [2023-08-04 01:39:05,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 79 transitions, 337 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:39:05,255 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 167 flow [2023-08-04 01:39:05,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, 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 01:39:05,256 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-04 01:39:05,256 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 167 flow [2023-08-04 01:39:05,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 01:39:05,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:05,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:05,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:39:05,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:05,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1813242259, now seen corresponding path program 1 times [2023-08-04 01:39:05,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:05,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856746359] [2023-08-04 01:39:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:05,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:05,298 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 01:39:05,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:05,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856746359] [2023-08-04 01:39:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856746359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:39:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63416057] [2023-08-04 01:39:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:05,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:05,315 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 01:39:05,329 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 01:39:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:05,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:39:05,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:39:05,426 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 01:39:05,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:39:05,446 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 01:39:05,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63416057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:39:05,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:39:05,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:39:05,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061856078] [2023-08-04 01:39:05,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:39:05,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:39:05,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:39:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:39:05,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 576 [2023-08-04 01:39:05,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 272.6) internal successors, (1363), 5 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states 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 01:39:05,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:05,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 576 [2023-08-04 01:39:05,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:17,091 INFO L124 PetriNetUnfolderBase]: 196457/246221 cut-off events. [2023-08-04 01:39:17,091 INFO L125 PetriNetUnfolderBase]: For 3770/3770 co-relation queries the response was YES. [2023-08-04 01:39:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495132 conditions, 246221 events. 196457/246221 cut-off events. For 3770/3770 co-relation queries the response was YES. Maximal size of possible extension queue 6626. Compared 1377297 event pairs, 68420 based on Foata normal form. 10/186932 useless extension candidates. Maximal degree in co-relation 58082. Up to 243813 conditions per place. [2023-08-04 01:39:18,686 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 93 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-08-04 01:39:18,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 426 flow [2023-08-04 01:39:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:39:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:39:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1177 transitions. [2023-08-04 01:39:18,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108506944444444 [2023-08-04 01:39:18,689 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1177 transitions. [2023-08-04 01:39:18,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1177 transitions. [2023-08-04 01:39:18,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:18,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1177 transitions. [2023-08-04 01:39:18,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.25) internal successors, (1177), 4 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 01:39:18,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states 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 01:39:18,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states 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 01:39:18,696 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 167 flow. Second operand 4 states and 1177 transitions. [2023-08-04 01:39:18,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 426 flow [2023-08-04 01:39:18,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:39:18,698 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 164 flow [2023-08-04 01:39:18,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, 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 01:39:18,699 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-08-04 01:39:18,699 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 164 flow [2023-08-04 01:39:18,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 272.6) internal successors, (1363), 5 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states 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 01:39:18,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:18,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:18,704 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 01:39:18,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 01:39:18,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:18,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1674983703, now seen corresponding path program 1 times [2023-08-04 01:39:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:18,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900959875] [2023-08-04 01:39:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:18,986 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 01:39:18,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:18,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900959875] [2023-08-04 01:39:18,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900959875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:39:18,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730618429] [2023-08-04 01:39:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:18,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:18,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:18,988 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) [2023-08-04 01:39:18,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 01:39:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:19,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:39:19,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:39:19,081 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 01:39:19,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:39:19,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730618429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:19,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:39:19,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:39:19,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565663662] [2023-08-04 01:39:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:19,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:39:19,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:39:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:39:19,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 576 [2023-08-04 01:39:19,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 272.6) internal successors, (1363), 5 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states 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 01:39:19,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:19,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 576 [2023-08-04 01:39:19,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:26,865 INFO L124 PetriNetUnfolderBase]: 130545/165131 cut-off events. [2023-08-04 01:39:26,866 INFO L125 PetriNetUnfolderBase]: For 2022/2022 co-relation queries the response was YES. [2023-08-04 01:39:27,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333060 conditions, 165131 events. 130545/165131 cut-off events. For 2022/2022 co-relation queries the response was YES. Maximal size of possible extension queue 5042. Compared 900871 event pairs, 316 based on Foata normal form. 14520/139114 useless extension candidates. Maximal degree in co-relation 97874. Up to 80432 conditions per place. [2023-08-04 01:39:27,221 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 0 selfloop transitions, 0 changer transitions 176/176 dead transitions. [2023-08-04 01:39:27,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 176 transitions, 726 flow [2023-08-04 01:39:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:39:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:39:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1522 transitions. [2023-08-04 01:39:27,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284722222222222 [2023-08-04 01:39:27,224 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1522 transitions. [2023-08-04 01:39:27,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1522 transitions. [2023-08-04 01:39:27,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:27,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1522 transitions. [2023-08-04 01:39:27,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.4) internal successors, (1522), 5 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states 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 01:39:27,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states 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 01:39:27,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states 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 01:39:27,231 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 164 flow. Second operand 5 states and 1522 transitions. [2023-08-04 01:39:27,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 176 transitions, 726 flow [2023-08-04 01:39:27,481 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 01:39:27,482 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 01:39:27,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, 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 01:39:27,483 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-04 01:39:27,483 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 01:39:27,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 272.6) internal successors, (1363), 5 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states 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 01:39:27,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:39:27,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:39:27,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 01:39:27,688 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 [2023-08-04 01:39:27,689 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:39:27,689 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:39:27,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 01:39:27,775 INFO L124 PetriNetUnfolderBase]: 141/1027 cut-off events. [2023-08-04 01:39:27,776 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:39:27,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1027 events. 141/1027 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6407 event pairs, 1 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-04 01:39:27,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 01:39:27,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 305 transitions, 658 flow [2023-08-04 01:39:27,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:39:27,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 305 transitions, 658 flow [2023-08-04 01:39:27,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 305 transitions, 658 flow [2023-08-04 01:39:27,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 01:39:27,872 INFO L124 PetriNetUnfolderBase]: 141/1027 cut-off events. [2023-08-04 01:39:27,872 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:39:27,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1027 events. 141/1027 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6407 event pairs, 1 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-04 01:39:27,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-04 01:39:31,779 INFO L134 LiptonReduction]: Checked pairs total: 87808 [2023-08-04 01:39:31,779 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-04 01:39:31,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:39:31,781 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;@7d93ac04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:39:31,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 01:39:31,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:39:31,783 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 01:39:31,783 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 01:39:31,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:31,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:31,783 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 01:39:31,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1509645768, now seen corresponding path program 1 times [2023-08-04 01:39:31,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:31,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561038320] [2023-08-04 01:39:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:31,823 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 01:39:31,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561038320] [2023-08-04 01:39:31,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561038320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:31,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:39:31,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:39:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360449663] [2023-08-04 01:39:31,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:31,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:39:31,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:39:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:39:31,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 574 [2023-08-04 01:39:31,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states 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 01:39:31,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:31,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 574 [2023-08-04 01:39:31,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:40:46,254 INFO L124 PetriNetUnfolderBase]: 1177754/1505688 cut-off events. [2023-08-04 01:40:46,255 INFO L125 PetriNetUnfolderBase]: For 70346/70346 co-relation queries the response was YES. [2023-08-04 01:40:49,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3010382 conditions, 1505688 events. 1177754/1505688 cut-off events. For 70346/70346 co-relation queries the response was YES. Maximal size of possible extension queue 29215. Compared 10259126 event pairs, 378748 based on Foata normal form. 0/1082051 useless extension candidates. Maximal degree in co-relation 1713412. Up to 808000 conditions per place. [2023-08-04 01:40:55,866 INFO L140 encePairwiseOnDemand]: 564/574 looper letters, 136 selfloop transitions, 7 changer transitions 0/152 dead transitions. [2023-08-04 01:40:55,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 152 transitions, 675 flow [2023-08-04 01:40:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:40:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:40:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 950 transitions. [2023-08-04 01:40:55,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516840882694541 [2023-08-04 01:40:55,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 950 transitions. [2023-08-04 01:40:55,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 950 transitions. [2023-08-04 01:40:55,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:40:55,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 950 transitions. [2023-08-04 01:40:55,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 01:40:55,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 01:40:55,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 01:40:55,909 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 3 states and 950 transitions. [2023-08-04 01:40:55,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 152 transitions, 675 flow [2023-08-04 01:40:55,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 152 transitions, 675 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:40:55,960 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 272 flow [2023-08-04 01:40:55,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, 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=272, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-04 01:40:55,962 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-04 01:40:55,962 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 272 flow [2023-08-04 01:40:55,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states 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 01:40:55,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:40:55,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:40:55,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:40:55,963 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 01:40:55,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:40:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 391947697, now seen corresponding path program 1 times [2023-08-04 01:40:55,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:40:55,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025727646] [2023-08-04 01:40:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:55,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:40:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:56,001 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 01:40:56,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:40:56,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025727646] [2023-08-04 01:40:56,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025727646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:40:56,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:40:56,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:40:56,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975553843] [2023-08-04 01:40:56,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:40:56,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:40:56,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:40:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:40:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:40:56,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 574 [2023-08-04 01:40:56,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 01:40:56,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:40:56,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 574 [2023-08-04 01:40:56,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:42:25,503 INFO L124 PetriNetUnfolderBase]: 1176031/1494045 cut-off events. [2023-08-04 01:42:25,517 INFO L125 PetriNetUnfolderBase]: For 311447/311580 co-relation queries the response was YES. [2023-08-04 01:42:28,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3257851 conditions, 1494045 events. 1176031/1494045 cut-off events. For 311447/311580 co-relation queries the response was YES. Maximal size of possible extension queue 28798. Compared 9988406 event pairs, 662825 based on Foata normal form. 0/1136276 useless extension candidates. Maximal degree in co-relation 721668. Up to 1470126 conditions per place. [2023-08-04 01:42:35,790 INFO L140 encePairwiseOnDemand]: 571/574 looper letters, 92 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-08-04 01:42:35,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 496 flow [2023-08-04 01:42:35,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:42:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:42:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 901 transitions. [2023-08-04 01:42:35,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232288037166086 [2023-08-04 01:42:35,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 901 transitions. [2023-08-04 01:42:35,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 901 transitions. [2023-08-04 01:42:35,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:42:35,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 901 transitions. [2023-08-04 01:42:35,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states 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 01:42:35,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 01:42:35,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 01:42:35,807 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 272 flow. Second operand 3 states and 901 transitions. [2023-08-04 01:42:35,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 496 flow