/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-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:38:45,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:38:45,875 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:38:45,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:38:45,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:38:45,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:38:45,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:38:45,899 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:38:45,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:38:45,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:38:45,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:38:45,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:38:45,901 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:38:45,901 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:38:45,902 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:38:45,902 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:38:45,902 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:38:45,902 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:38:45,903 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:38:45,903 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:38:45,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:38:45,904 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:38:45,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:38:45,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:38:45,905 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:38:45,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:38:45,905 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:38:45,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:38:45,906 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:38:45,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:38:45,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:38:45,907 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:38:45,907 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:38:45,907 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:38:45,908 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:38:45,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:38:45,908 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:38:45,908 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:38:45,909 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:38:45,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:38:45,909 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:38:45,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:38:46,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:38:46,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:38:46,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:38:46,143 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:38:46,144 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:38:46,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longer-2_bound2.i [2023-08-04 01:38:47,314 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:38:47,562 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:38:47,563 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longer-2_bound2.i [2023-08-04 01:38:47,580 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2805e9fa6/79d6807f203f4a238061d92117d0e158/FLAG58511e89f [2023-08-04 01:38:47,591 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2805e9fa6/79d6807f203f4a238061d92117d0e158 [2023-08-04 01:38:47,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:38:47,595 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:38:47,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:38:47,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:38:47,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:38:47,599 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:38:47" (1/1) ... [2023-08-04 01:38:47,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479edd57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:47, skipping insertion in model container [2023-08-04 01:38:47,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:38:47" (1/1) ... [2023-08-04 01:38:47,641 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:38:47,966 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-2_bound2.i[41529,41542] [2023-08-04 01:38:47,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:38:48,005 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:38:48,036 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:38:48,038 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:38:48,046 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-04 01:38:48,052 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-2_bound2.i[41529,41542] [2023-08-04 01:38:48,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:38:48,122 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:38:48,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48 WrapperNode [2023-08-04 01:38:48,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:38:48,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:38:48,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:38:48,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:38:48,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,147 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,172 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 181 [2023-08-04 01:38:48,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:38:48,173 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:38:48,173 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:38:48,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:38:48,183 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,195 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:38:48,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:38:48,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:38:48,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:38:48,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (1/1) ... [2023-08-04 01:38:48,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:38:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:38:48,251 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 01:38:48,257 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 01:38:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:38:48,287 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:38:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:38:48,287 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:38:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:38:48,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:38:48,290 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 01:38:48,413 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:38:48,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:38:48,630 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:38:48,639 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:38:48,639 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 01:38:48,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:38:48 BoogieIcfgContainer [2023-08-04 01:38:48,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:38:48,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:38:48,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:38:48,646 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:38:48,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:38:47" (1/3) ... [2023-08-04 01:38:48,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9b5afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:38:48, skipping insertion in model container [2023-08-04 01:38:48,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:38:48" (2/3) ... [2023-08-04 01:38:48,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9b5afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:38:48, skipping insertion in model container [2023-08-04 01:38:48,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:38:48" (3/3) ... [2023-08-04 01:38:48,649 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack_longer-2_bound2.i [2023-08-04 01:38:48,655 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:38:48,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:38:48,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 01:38:48,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:38:48,745 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:38:48,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 181 transitions, 384 flow [2023-08-04 01:38:48,939 INFO L124 PetriNetUnfolderBase]: 37/330 cut-off events. [2023-08-04 01:38:48,939 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:38:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 330 events. 37/330 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1442 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-04 01:38:48,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 181 transitions, 384 flow [2023-08-04 01:38:48,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 181 transitions, 384 flow [2023-08-04 01:38:48,957 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:38:48,965 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 181 transitions, 384 flow [2023-08-04 01:38:48,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 181 transitions, 384 flow [2023-08-04 01:38:48,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 181 transitions, 384 flow [2023-08-04 01:38:49,012 INFO L124 PetriNetUnfolderBase]: 37/330 cut-off events. [2023-08-04 01:38:49,012 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:38:49,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 330 events. 37/330 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1442 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-04 01:38:49,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-04 01:38:52,695 INFO L134 LiptonReduction]: Checked pairs total: 21109 [2023-08-04 01:38:52,695 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-04 01:38:52,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:38:52,714 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;@6401f1a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:38:52,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:38:52,720 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:38:52,720 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-08-04 01:38:52,720 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:38:52,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:52,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:38:52,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:52,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:52,726 INFO L85 PathProgramCache]: Analyzing trace with hash 434086919, now seen corresponding path program 1 times [2023-08-04 01:38:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166496432] [2023-08-04 01:38:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:52,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:38:52,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:38:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:38:52,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:38:52,883 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:38:52,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:38:52,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:38:52,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:38:52,886 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:38:52,888 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:38:52,889 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:38:52,889 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:38:52,932 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:38:52,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-04 01:38:53,106 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-04 01:38:53,107 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:38:53,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-04 01:38:53,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 287 transitions, 622 flow [2023-08-04 01:38:53,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 287 transitions, 622 flow [2023-08-04 01:38:53,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:38:53,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-04 01:38:53,135 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-04 01:38:53,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-04 01:38:53,314 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-04 01:38:53,314 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:38:53,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-04 01:38:53,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-04 01:38:57,800 INFO L134 LiptonReduction]: Checked pairs total: 79921 [2023-08-04 01:38:57,800 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-04 01:38:57,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:38:57,804 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;@6401f1a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:38:57,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:38:57,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:38:57,813 INFO L124 PetriNetUnfolderBase]: 10/92 cut-off events. [2023-08-04 01:38:57,813 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 01:38:57,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:57,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:38:57,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:57,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash 409571604, now seen corresponding path program 1 times [2023-08-04 01:38:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:57,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619060078] [2023-08-04 01:38:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:57,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:57,980 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 01:38:57,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:57,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619060078] [2023-08-04 01:38:57,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619060078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:38:57,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308747436] [2023-08-04 01:38:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:57,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:38:57,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:38:57,984 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 01:38:58,012 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 01:38:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:58,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:38:58,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:38:58,141 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 01:38:58,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:38:58,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308747436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:38:58,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:38:58,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:38:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062404325] [2023-08-04 01:38:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:38:58,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:38:58,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:58,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:38:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:38:58,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 541 [2023-08-04 01:38:58,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states 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 01:38:58,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:58,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 541 [2023-08-04 01:38:58,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:34,896 INFO L124 PetriNetUnfolderBase]: 485008/620316 cut-off events. [2023-08-04 01:39:34,897 INFO L125 PetriNetUnfolderBase]: For 28965/28965 co-relation queries the response was YES. [2023-08-04 01:39:35,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237621 conditions, 620316 events. 485008/620316 cut-off events. For 28965/28965 co-relation queries the response was YES. Maximal size of possible extension queue 13121. Compared 3929036 event pairs, 184329 based on Foata normal form. 0/440061 useless extension candidates. Maximal degree in co-relation 176232. Up to 602375 conditions per place. [2023-08-04 01:39:36,864 INFO L140 encePairwiseOnDemand]: 537/541 looper letters, 85 selfloop transitions, 5 changer transitions 17/114 dead transitions. [2023-08-04 01:39:36,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 482 flow [2023-08-04 01:39:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:39:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:39:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1366 transitions. [2023-08-04 01:39:36,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049907578558226 [2023-08-04 01:39:36,891 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1366 transitions. [2023-08-04 01:39:36,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1366 transitions. [2023-08-04 01:39:36,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:36,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1366 transitions. [2023-08-04 01:39:36,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 273.2) internal successors, (1366), 5 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states 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 01:39:36,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states 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 01:39:36,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states 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 01:39:36,916 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 210 flow. Second operand 5 states and 1366 transitions. [2023-08-04 01:39:36,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 482 flow [2023-08-04 01:39:36,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:39:36,938 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 167 flow [2023-08-04 01:39:36,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2023-08-04 01:39:36,942 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-08-04 01:39:36,943 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 167 flow [2023-08-04 01:39:36,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states 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 01:39:36,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:36,944 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:39:36,953 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 01:39:37,150 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 01:39:37,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:37,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash -938631566, now seen corresponding path program 1 times [2023-08-04 01:39:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:37,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267251940] [2023-08-04 01:39:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:37,230 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 01:39:37,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:37,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267251940] [2023-08-04 01:39:37,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267251940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:37,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:39:37,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:39:37,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881816494] [2023-08-04 01:39:37,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:39:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:39:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:39:37,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 541 [2023-08-04 01:39:37,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 01:39:37,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:37,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 541 [2023-08-04 01:39:37,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:46,716 INFO L124 PetriNetUnfolderBase]: 145860/186157 cut-off events. [2023-08-04 01:39:46,717 INFO L125 PetriNetUnfolderBase]: For 3699/3699 co-relation queries the response was YES. [2023-08-04 01:39:46,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372296 conditions, 186157 events. 145860/186157 cut-off events. For 3699/3699 co-relation queries the response was YES. Maximal size of possible extension queue 4698. Compared 1052017 event pairs, 80028 based on Foata normal form. 1/141557 useless extension candidates. Maximal degree in co-relation 44420. Up to 181859 conditions per place. [2023-08-04 01:39:47,582 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 67 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 01:39:47,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 324 flow [2023-08-04 01:39:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:39:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:39:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 828 transitions. [2023-08-04 01:39:47,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101663585951941 [2023-08-04 01:39:47,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 828 transitions. [2023-08-04 01:39:47,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 828 transitions. [2023-08-04 01:39:47,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:47,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 828 transitions. [2023-08-04 01:39:47,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 01:39:47,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states 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 01:39:47,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states 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 01:39:47,593 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 167 flow. Second operand 3 states and 828 transitions. [2023-08-04 01:39:47,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 324 flow [2023-08-04 01:39:47,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 76 transitions, 321 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:39:47,599 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 163 flow [2023-08-04 01:39:47,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-08-04 01:39:47,600 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-08-04 01:39:47,600 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 163 flow [2023-08-04 01:39:47,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 01:39:47,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:47,601 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:39:47,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:47,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1579538482, now seen corresponding path program 1 times [2023-08-04 01:39:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:47,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910339581] [2023-08-04 01:39:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:47,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:47,656 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 01:39:47,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:47,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910339581] [2023-08-04 01:39:47,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910339581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:39:47,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444728835] [2023-08-04 01:39:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:47,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:47,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:47,662 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 01:39:47,669 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 01:39:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:47,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:39:47,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:39:47,778 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 01:39:47,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:39:47,801 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 01:39:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444728835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:39:47,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:39:47,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:39:47,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336791073] [2023-08-04 01:39:47,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:39:47,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:39:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:39:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:39:47,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 541 [2023-08-04 01:39:47,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 01:39:47,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:47,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 541 [2023-08-04 01:39:47,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:56,143 INFO L124 PetriNetUnfolderBase]: 134887/171143 cut-off events. [2023-08-04 01:39:56,143 INFO L125 PetriNetUnfolderBase]: For 2781/2781 co-relation queries the response was YES. [2023-08-04 01:39:56,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341918 conditions, 171143 events. 134887/171143 cut-off events. For 2781/2781 co-relation queries the response was YES. Maximal size of possible extension queue 4550. Compared 945464 event pairs, 46170 based on Foata normal form. 9/130022 useless extension candidates. Maximal degree in co-relation 44386. Up to 167077 conditions per place. [2023-08-04 01:39:57,167 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 85 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-08-04 01:39:57,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 398 flow [2023-08-04 01:39:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:39:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:39:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1097 transitions. [2023-08-04 01:39:57,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069316081330869 [2023-08-04 01:39:57,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1097 transitions. [2023-08-04 01:39:57,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1097 transitions. [2023-08-04 01:39:57,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:57,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1097 transitions. [2023-08-04 01:39:57,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.25) internal successors, (1097), 4 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states 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 01:39:57,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 541.0) internal successors, (2705), 5 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states 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 01:39:57,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 541.0) internal successors, (2705), 5 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states 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 01:39:57,179 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 163 flow. Second operand 4 states and 1097 transitions. [2023-08-04 01:39:57,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 398 flow [2023-08-04 01:39:57,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:39:57,183 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 160 flow [2023-08-04 01:39:57,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-08-04 01:39:57,186 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2023-08-04 01:39:57,186 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 160 flow [2023-08-04 01:39:57,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 01:39:57,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:57,190 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:57,200 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 01:39:57,395 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 01:39:57,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:57,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 938015633, now seen corresponding path program 1 times [2023-08-04 01:39:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030241814] [2023-08-04 01:39:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:57,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:57,483 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 01:39:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030241814] [2023-08-04 01:39:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030241814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:39:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484364881] [2023-08-04 01:39:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:57,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:57,485 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 01:39:57,488 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 01:39:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:57,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:39:57,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:39:57,603 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 01:39:57,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:39:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484364881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:57,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:39:57,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:39:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186071422] [2023-08-04 01:39:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:57,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:39:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:39:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:39:57,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 541 [2023-08-04 01:39:57,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 01:39:57,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:57,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 541 [2023-08-04 01:39:57,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:40:02,901 INFO L124 PetriNetUnfolderBase]: 89941/114545 cut-off events. [2023-08-04 01:40:02,901 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2023-08-04 01:40:03,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230249 conditions, 114545 events. 89941/114545 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 3358. Compared 606747 event pairs, 232 based on Foata normal form. 9801/95983 useless extension candidates. Maximal degree in co-relation 75017. Up to 54747 conditions per place. [2023-08-04 01:40:03,137 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 0 selfloop transitions, 0 changer transitions 164/164 dead transitions. [2023-08-04 01:40:03,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 164 transitions, 674 flow [2023-08-04 01:40:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:40:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:40:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1418 transitions. [2023-08-04 01:40:03,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242144177449168 [2023-08-04 01:40:03,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1418 transitions. [2023-08-04 01:40:03,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1418 transitions. [2023-08-04 01:40:03,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:40:03,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1418 transitions. [2023-08-04 01:40:03,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 283.6) internal successors, (1418), 5 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states 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 01:40:03,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states 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 01:40:03,150 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states 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 01:40:03,150 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 160 flow. Second operand 5 states and 1418 transitions. [2023-08-04 01:40:03,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 164 transitions, 674 flow [2023-08-04 01:40:03,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 164 transitions, 667 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:40:03,440 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-04 01:40:03,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-04 01:40:03,442 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-08-04 01:40:03,442 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-04 01:40:03,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 01:40:03,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:40:03,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:40:03,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 01:40:03,648 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 01:40:03,648 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:40:03,649 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:40:03,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-04 01:40:03,775 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-04 01:40:03,775 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:40:03,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-04 01:40:03,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 287 transitions, 622 flow [2023-08-04 01:40:03,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 287 transitions, 622 flow [2023-08-04 01:40:03,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:40:03,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-04 01:40:03,796 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-04 01:40:03,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-04 01:40:03,911 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-04 01:40:03,911 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:40:03,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-04 01:40:03,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-04 01:40:07,936 INFO L134 LiptonReduction]: Checked pairs total: 81242 [2023-08-04 01:40:07,936 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-04 01:40:07,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:40:07,939 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;@6401f1a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:40:07,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 01:40:07,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:40:07,942 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-08-04 01:40:07,942 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 01:40:07,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:40:07,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:40:07,942 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 01:40:07,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:40:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash 591407951, now seen corresponding path program 1 times [2023-08-04 01:40:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:40:07,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958039620] [2023-08-04 01:40:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:40:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:08,041 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 01:40:08,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:40:08,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958039620] [2023-08-04 01:40:08,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958039620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:40:08,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:40:08,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:40:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004290280] [2023-08-04 01:40:08,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:40:08,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:40:08,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:40:08,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:40:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:40:08,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 542 [2023-08-04 01:40:08,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 01:40:08,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:40:08,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 542 [2023-08-04 01:40:08,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:41:13,241 INFO L124 PetriNetUnfolderBase]: 854223/1101645 cut-off events. [2023-08-04 01:41:13,241 INFO L125 PetriNetUnfolderBase]: For 57902/57902 co-relation queries the response was YES. [2023-08-04 01:41:14,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202844 conditions, 1101645 events. 854223/1101645 cut-off events. For 57902/57902 co-relation queries the response was YES. Maximal size of possible extension queue 22010. Compared 7479244 event pairs, 310945 based on Foata normal form. 15285/815048 useless extension candidates. Maximal degree in co-relation 1445068. Up to 651108 conditions per place. [2023-08-04 01:41:18,869 INFO L140 encePairwiseOnDemand]: 528/542 looper letters, 128 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2023-08-04 01:41:18,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 145 transitions, 645 flow [2023-08-04 01:41:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:41:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:41:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-08-04 01:41:18,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375153751537516 [2023-08-04 01:41:18,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-08-04 01:41:18,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-08-04 01:41:18,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:41:18,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-08-04 01:41:18,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states 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 01:41:18,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 01:41:18,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 01:41:18,878 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 212 flow. Second operand 3 states and 874 transitions. [2023-08-04 01:41:18,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 145 transitions, 645 flow [2023-08-04 01:41:18,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 145 transitions, 645 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:41:18,915 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 278 flow [2023-08-04 01:41:18,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2023-08-04 01:41:18,916 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2023-08-04 01:41:18,916 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 278 flow [2023-08-04 01:41:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 01:41:18,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:41:18,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:41:18,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:41:18,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:41:18,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:41:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -513170579, now seen corresponding path program 1 times [2023-08-04 01:41:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:41:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820240676] [2023-08-04 01:41:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:41:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:41:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:41:18,954 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 01:41:18,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:41:18,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820240676] [2023-08-04 01:41:18,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820240676] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:41:18,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:41:18,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:41:18,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859296731] [2023-08-04 01:41:18,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:41:18,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:41:18,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:41:18,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:41:18,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:41:18,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 542 [2023-08-04 01:41:18,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 01:41:18,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:41:18,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 542 [2023-08-04 01:41:18,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:42:40,333 INFO L124 PetriNetUnfolderBase]: 941675/1229779 cut-off events. [2023-08-04 01:42:40,333 INFO L125 PetriNetUnfolderBase]: For 290141/290779 co-relation queries the response was YES. [2023-08-04 01:42:42,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2691491 conditions, 1229779 events. 941675/1229779 cut-off events. For 290141/290779 co-relation queries the response was YES. Maximal size of possible extension queue 25429. Compared 8985306 event pairs, 504628 based on Foata normal form. 48/951102 useless extension candidates. Maximal degree in co-relation 1877884. Up to 1075077 conditions per place. [2023-08-04 01:42:50,372 INFO L140 encePairwiseOnDemand]: 539/542 looper letters, 139 selfloop transitions, 3 changer transitions 0/152 dead transitions. [2023-08-04 01:42:50,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 152 transitions, 763 flow [2023-08-04 01:42:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:42:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:42:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2023-08-04 01:42:50,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479704797047971 [2023-08-04 01:42:50,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2023-08-04 01:42:50,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2023-08-04 01:42:50,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:42:50,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2023-08-04 01:42:50,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 01:42:50,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 01:42:50,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 01:42:50,404 INFO L175 Difference]: Start difference. First operand has 77 places, 88 transitions, 278 flow. Second operand 3 states and 891 transitions. [2023-08-04 01:42:50,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 152 transitions, 763 flow [2023-08-04 01:42:53,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 152 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:42:53,116 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 279 flow [2023-08-04 01:42:53,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-04 01:42:53,117 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 5 predicate places. [2023-08-04 01:42:53,117 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 279 flow [2023-08-04 01:42:53,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 01:42:53,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:42:53,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:42:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 01:42:53,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:42:53,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:42:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2073636679, now seen corresponding path program 1 times [2023-08-04 01:42:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:42:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727338805] [2023-08-04 01:42:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:42:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:42:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:42:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:42:53,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:42:53,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727338805] [2023-08-04 01:42:53,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727338805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:42:53,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009000892] [2023-08-04 01:42:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:42:53,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:42:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:42:53,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:42:53,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 01:42:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:42:53,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:42:53,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:42:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:42:53,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:42:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:42:53,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009000892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:42:53,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:42:53,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 01:42:53,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3007569] [2023-08-04 01:42:53,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:42:53,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 01:42:53,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:42:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 01:42:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 01:42:53,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 542 [2023-08-04 01:42:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 279 flow. Second operand has 10 states, 10 states have (on average 242.7) internal successors, (2427), 10 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states 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 01:42:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:42:53,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 542 [2023-08-04 01:42:53,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand