/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 23:58:34,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 23:58:34,858 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-23 23:58:34,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 23:58:34,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 23:58:34,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 23:58:34,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 23:58:34,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 23:58:34,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 23:58:34,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 23:58:34,899 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 23:58:34,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 23:58:34,900 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 23:58:34,901 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 23:58:34,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 23:58:34,901 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 23:58:34,901 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 23:58:34,901 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 23:58:34,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 23:58:34,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 23:58:34,902 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 23:58:34,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 23:58:34,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 23:58:34,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 23:58:34,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 23:58:34,903 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 23:58:34,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 23:58:34,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:58:34,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 23:58:34,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 23:58:34,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 23:58:34,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 23:58:34,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 23:58:34,905 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 23:58:34,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 23:58:34,906 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 23:58:35,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 23:58:35,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 23:58:35,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 23:58:35,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 23:58:35,177 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 23:58:35,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-23 23:58:36,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 23:58:36,306 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 23:58:36,307 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-23 23:58:36,323 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897eaa6f6/a4cb5535e0cb48458dfe93965b005f57/FLAG7a548cde4 [2023-08-23 23:58:36,335 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897eaa6f6/a4cb5535e0cb48458dfe93965b005f57 [2023-08-23 23:58:36,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 23:58:36,339 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 23:58:36,341 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 23:58:36,342 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 23:58:36,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 23:58:36,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9c032e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36, skipping insertion in model container [2023-08-23 23:58:36,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,383 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 23:58:36,608 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2023-08-23 23:58:36,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:58:36,630 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 23:58:36,651 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-23 23:58:36,652 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-23 23:58:36,664 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2023-08-23 23:58:36,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:58:36,699 INFO L206 MainTranslator]: Completed translation [2023-08-23 23:58:36,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36 WrapperNode [2023-08-23 23:58:36,700 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 23:58:36,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 23:58:36,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 23:58:36,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 23:58:36,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,745 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-23 23:58:36,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 23:58:36,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 23:58:36,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 23:58:36,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 23:58:36,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,761 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,767 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 23:58:36,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 23:58:36,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 23:58:36,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 23:58:36,780 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (1/1) ... [2023-08-23 23:58:36,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:58:36,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:58:36,798 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) [2023-08-23 23:58:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 23:58:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 23:58:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-23 23:58:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 23:58:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 23:58:36,812 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 [2023-08-23 23:58:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-23 23:58:36,827 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-23 23:58:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 23:58:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 23:58:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 23:58:36,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 23:58:36,828 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 23:58:36,938 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 23:58:36,942 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 23:58:37,103 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 23:58:37,108 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 23:58:37,108 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-23 23:58:37,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:58:37 BoogieIcfgContainer [2023-08-23 23:58:37,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 23:58:37,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 23:58:37,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 23:58:37,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 23:58:37,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 11:58:36" (1/3) ... [2023-08-23 23:58:37,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d42fe0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:58:37, skipping insertion in model container [2023-08-23 23:58:37,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:58:36" (2/3) ... [2023-08-23 23:58:37,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d42fe0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:58:37, skipping insertion in model container [2023-08-23 23:58:37,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:58:37" (3/3) ... [2023-08-23 23:58:37,115 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-08-23 23:58:37,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 23:58:37,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 23:58:37,126 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 23:58:37,161 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-23 23:58:37,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 246 flow [2023-08-23 23:58:37,227 INFO L124 PetriNetUnfolderBase]: 17/156 cut-off events. [2023-08-23 23:58:37,228 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 23:58:37,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 369 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-23 23:58:37,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 246 flow [2023-08-23 23:58:37,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 233 flow [2023-08-23 23:58:37,237 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:58:37,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-23 23:58:37,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-23 23:58:37,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 233 flow [2023-08-23 23:58:37,262 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-08-23 23:58:37,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:58:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 348 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-23 23:58:37,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 2838 [2023-08-23 23:58:39,826 INFO L134 LiptonReduction]: Checked pairs total: 5319 [2023-08-23 23:58:39,826 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-23 23:58:39,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:58:39,840 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=false, 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;@63e3479e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:58:39,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:58:39,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:58:39,842 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:58:39,842 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:58:39,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:39,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:58:39,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:39,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash 13895078, now seen corresponding path program 1 times [2023-08-23 23:58:39,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:39,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552438366] [2023-08-23 23:58:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:39,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:40,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:58:40,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552438366] [2023-08-23 23:58:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552438366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:58:40,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:58:40,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:58:40,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791616593] [2023-08-23 23:58:40,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:58:40,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:58:40,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:58:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:58:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:58:40,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 216 [2023-08-23 23:58:40,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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) [2023-08-23 23:58:40,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:58:40,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 216 [2023-08-23 23:58:40,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:58:40,148 INFO L124 PetriNetUnfolderBase]: 80/188 cut-off events. [2023-08-23 23:58:40,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:58:40,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 634 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-08-23 23:58:40,152 INFO L140 encePairwiseOnDemand]: 204/216 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-08-23 23:58:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-23 23:58:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:58:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:58:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-23 23:58:40,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2023-08-23 23:58:40,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-23 23:58:40,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-23 23:58:40,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:58:40,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-23 23:58:40,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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) [2023-08-23 23:58:40,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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) [2023-08-23 23:58:40,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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) [2023-08-23 23:58:40,200 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 338 transitions. [2023-08-23 23:58:40,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-23 23:58:40,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:58:40,205 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-23 23:58:40,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-23 23:58:40,209 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-23 23:58:40,209 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-23 23:58:40,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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) [2023-08-23 23:58:40,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:40,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 23:58:40,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 23:58:40,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:40,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash 459877685, now seen corresponding path program 1 times [2023-08-23 23:58:40,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:40,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312289207] [2023-08-23 23:58:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:40,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:58:40,243 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:58:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:58:40,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:58:40,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:58:40,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:58:40,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:58:40,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 23:58:40,290 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 23:58:40,292 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:58:40,292 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 23:58:40,318 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-23 23:58:40,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 326 flow [2023-08-23 23:58:40,360 INFO L124 PetriNetUnfolderBase]: 31/253 cut-off events. [2023-08-23 23:58:40,360 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-23 23:58:40,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-23 23:58:40,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 154 transitions, 326 flow [2023-08-23 23:58:40,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 154 transitions, 326 flow [2023-08-23 23:58:40,365 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:58:40,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 154 transitions, 326 flow [2023-08-23 23:58:40,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 154 transitions, 326 flow [2023-08-23 23:58:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 326 flow [2023-08-23 23:58:40,385 INFO L124 PetriNetUnfolderBase]: 31/253 cut-off events. [2023-08-23 23:58:40,385 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-23 23:58:40,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-23 23:58:40,391 INFO L119 LiptonReduction]: Number of co-enabled transitions 8580 [2023-08-23 23:58:42,789 INFO L134 LiptonReduction]: Checked pairs total: 16879 [2023-08-23 23:58:42,790 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-23 23:58:42,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:58:42,793 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=false, 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;@63e3479e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:58:42,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:58:42,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:58:42,794 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:58:42,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:58:42,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:42,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:58:42,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:42,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:42,795 INFO L85 PathProgramCache]: Analyzing trace with hash 23344401, now seen corresponding path program 1 times [2023-08-23 23:58:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:42,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984026156] [2023-08-23 23:58:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:42,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:58:42,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984026156] [2023-08-23 23:58:42,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984026156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:58:42,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:58:42,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:58:42,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909328206] [2023-08-23 23:58:42,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:58:42,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:58:42,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:58:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:58:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:58:42,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 272 [2023-08-23 23:58:42,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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) [2023-08-23 23:58:42,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:58:42,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 272 [2023-08-23 23:58:42,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:58:42,985 INFO L124 PetriNetUnfolderBase]: 1642/2913 cut-off events. [2023-08-23 23:58:42,986 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-23 23:58:42,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2913 events. 1642/2913 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 17171 event pairs, 752 based on Foata normal form. 428/3024 useless extension candidates. Maximal degree in co-relation 585. Up to 2673 conditions per place. [2023-08-23 23:58:42,994 INFO L140 encePairwiseOnDemand]: 255/272 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-08-23 23:58:42,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-23 23:58:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:58:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:58:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-23 23:58:42,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330882352941176 [2023-08-23 23:58:42,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-23 23:58:42,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-23 23:58:42,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:58:42,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-23 23:58:42,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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) [2023-08-23 23:58:42,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 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) [2023-08-23 23:58:42,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 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) [2023-08-23 23:58:42,999 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 435 transitions. [2023-08-23 23:58:42,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-23 23:58:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:58:43,000 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2023-08-23 23:58:43,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-23 23:58:43,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-23 23:58:43,001 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2023-08-23 23:58:43,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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) [2023-08-23 23:58:43,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:43,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:58:43,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 23:58:43,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:43,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash 268339273, now seen corresponding path program 1 times [2023-08-23 23:58:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:43,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604069271] [2023-08-23 23:58:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:43,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:43,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:58:43,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604069271] [2023-08-23 23:58:43,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604069271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:58:43,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696323726] [2023-08-23 23:58:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:43,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:58:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:58:43,048 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) [2023-08-23 23:58:43,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 23:58:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:43,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:58:43,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:58:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:43,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:58:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:43,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696323726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:58:43,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:58:43,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:58:43,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242961844] [2023-08-23 23:58:43,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:58:43,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:58:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:58:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:58:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:58:43,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 272 [2023-08-23 23:58:43,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 126.28571428571429) internal successors, (884), 7 states have internal predecessors, (884), 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) [2023-08-23 23:58:43,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:58:43,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 272 [2023-08-23 23:58:43,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:58:43,269 INFO L124 PetriNetUnfolderBase]: 376/769 cut-off events. [2023-08-23 23:58:43,269 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-23 23:58:43,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3926 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2023-08-23 23:58:43,272 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-23 23:58:43,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2023-08-23 23:58:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 23:58:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 23:58:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-23 23:58:43,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2023-08-23 23:58:43,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-23 23:58:43,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-23 23:58:43,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:58:43,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-23 23:58:43,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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) [2023-08-23 23:58:43,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 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) [2023-08-23 23:58:43,278 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 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) [2023-08-23 23:58:43,278 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 670 transitions. [2023-08-23 23:58:43,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2023-08-23 23:58:43,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-23 23:58:43,282 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-23 23:58:43,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-23 23:58:43,283 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-23 23:58:43,284 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-23 23:58:43,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 126.28571428571429) internal successors, (884), 7 states have internal predecessors, (884), 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) [2023-08-23 23:58:43,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:43,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 23:58:43,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-23 23:58:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:58:43,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:43,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1086733379, now seen corresponding path program 1 times [2023-08-23 23:58:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:43,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217870874] [2023-08-23 23:58:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:58:43,542 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:58:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:58:43,558 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:58:43,558 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:58:43,558 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:58:43,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:58:43,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 23:58:43,559 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:58:43,559 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:58:43,559 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 23:58:43,581 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-23 23:58:43,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 408 flow [2023-08-23 23:58:43,612 INFO L124 PetriNetUnfolderBase]: 50/383 cut-off events. [2023-08-23 23:58:43,612 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-23 23:58:43,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 50/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1286 event pairs, 1 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-23 23:58:43,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 189 transitions, 408 flow [2023-08-23 23:58:43,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 189 transitions, 408 flow [2023-08-23 23:58:43,621 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:58:43,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 189 transitions, 408 flow [2023-08-23 23:58:43,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 189 transitions, 408 flow [2023-08-23 23:58:43,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 408 flow [2023-08-23 23:58:43,643 INFO L124 PetriNetUnfolderBase]: 50/383 cut-off events. [2023-08-23 23:58:43,643 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-23 23:58:43,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 50/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1286 event pairs, 1 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-23 23:58:43,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 16434 [2023-08-23 23:58:46,296 INFO L134 LiptonReduction]: Checked pairs total: 39041 [2023-08-23 23:58:46,296 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-23 23:58:46,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:58:46,299 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=false, 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;@63e3479e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:58:46,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:58:46,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:58:46,300 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:58:46,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:58:46,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:46,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:58:46,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:46,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash 34486751, now seen corresponding path program 1 times [2023-08-23 23:58:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:46,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582309126] [2023-08-23 23:58:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:46,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:58:46,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582309126] [2023-08-23 23:58:46,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582309126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:58:46,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:58:46,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:58:46,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102531574] [2023-08-23 23:58:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:58:46,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:58:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:58:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:58:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:58:46,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-23 23:58:46,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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) [2023-08-23 23:58:46,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:58:46,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-23 23:58:46,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:58:49,158 INFO L124 PetriNetUnfolderBase]: 32280/46608 cut-off events. [2023-08-23 23:58:49,159 INFO L125 PetriNetUnfolderBase]: For 1321/1321 co-relation queries the response was YES. [2023-08-23 23:58:49,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92837 conditions, 46608 events. 32280/46608 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 303001 event pairs, 21006 based on Foata normal form. 5103/47988 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-08-23 23:58:49,284 INFO L140 encePairwiseOnDemand]: 304/327 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-08-23 23:58:49,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-08-23 23:58:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:58:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:58:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-23 23:58:49,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545361875637105 [2023-08-23 23:58:49,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-23 23:58:49,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-23 23:58:49,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:58:49,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-23 23:58:49,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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) [2023-08-23 23:58:49,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-23 23:58:49,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-23 23:58:49,289 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 535 transitions. [2023-08-23 23:58:49,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-08-23 23:58:49,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:58:49,291 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2023-08-23 23:58:49,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-23 23:58:49,291 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-23 23:58:49,292 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2023-08-23 23:58:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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) [2023-08-23 23:58:49,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:49,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:58:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 23:58:49,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:49,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1059854301, now seen corresponding path program 1 times [2023-08-23 23:58:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:49,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494434302] [2023-08-23 23:58:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:49,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:58:49,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494434302] [2023-08-23 23:58:49,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494434302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:58:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125329519] [2023-08-23 23:58:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:58:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:58:49,357 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) [2023-08-23 23:58:49,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-23 23:58:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:49,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:58:49,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:58:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:49,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:58:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125329519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:58:49,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:58:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:58:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952110312] [2023-08-23 23:58:49,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:58:49,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:58:49,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:58:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:58:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:58:49,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-23 23:58:49,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:58:49,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:58:49,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-23 23:58:49,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:58:50,346 INFO L124 PetriNetUnfolderBase]: 7582/12187 cut-off events. [2023-08-23 23:58:50,346 INFO L125 PetriNetUnfolderBase]: For 4374/4374 co-relation queries the response was YES. [2023-08-23 23:58:50,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81046 event pairs, 0 based on Foata normal form. 1098/13285 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2023-08-23 23:58:50,423 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-08-23 23:58:50,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2023-08-23 23:58:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:58:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:58:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1000 transitions. [2023-08-23 23:58:50,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509683995922528 [2023-08-23 23:58:50,428 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1000 transitions. [2023-08-23 23:58:50,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1000 transitions. [2023-08-23 23:58:50,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:58:50,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1000 transitions. [2023-08-23 23:58:50,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 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) [2023-08-23 23:58:50,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 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) [2023-08-23 23:58:50,434 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 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) [2023-08-23 23:58:50,435 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 1000 transitions. [2023-08-23 23:58:50,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2023-08-23 23:58:50,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-23 23:58:50,444 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-23 23:58:50,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-23 23:58:50,445 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-23 23:58:50,446 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-23 23:58:50,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:58:50,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:50,447 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 23:58:50,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-23 23:58:50,651 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,SelfDestructingSolverStorable6 [2023-08-23 23:58:50,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:50,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1357379982, now seen corresponding path program 1 times [2023-08-23 23:58:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:50,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921803793] [2023-08-23 23:58:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:58:50,668 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:58:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:58:50,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:58:50,688 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:58:50,688 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:58:50,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:58:50,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 23:58:50,688 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:58:50,689 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:58:50,689 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 23:58:50,715 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-23 23:58:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 492 flow [2023-08-23 23:58:50,769 INFO L124 PetriNetUnfolderBase]: 81/581 cut-off events. [2023-08-23 23:58:50,769 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-23 23:58:50,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 581 events. 81/581 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2229 event pairs, 6 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2023-08-23 23:58:50,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 224 transitions, 492 flow [2023-08-23 23:58:50,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 224 transitions, 492 flow [2023-08-23 23:58:50,780 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:58:50,780 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 224 transitions, 492 flow [2023-08-23 23:58:50,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 224 transitions, 492 flow [2023-08-23 23:58:50,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 492 flow [2023-08-23 23:58:50,829 INFO L124 PetriNetUnfolderBase]: 81/581 cut-off events. [2023-08-23 23:58:50,830 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-23 23:58:50,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 581 events. 81/581 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2229 event pairs, 6 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2023-08-23 23:58:50,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 26664 [2023-08-23 23:58:53,667 INFO L134 LiptonReduction]: Checked pairs total: 60004 [2023-08-23 23:58:53,667 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-23 23:58:53,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:58:53,669 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=false, 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;@63e3479e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:58:53,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:58:53,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:58:53,670 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:58:53,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:58:53,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:58:53,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:58:53,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:58:53,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:58:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 47324301, now seen corresponding path program 1 times [2023-08-23 23:58:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:58:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838470785] [2023-08-23 23:58:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:58:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:58:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:58:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:58:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:58:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838470785] [2023-08-23 23:58:53,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838470785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:58:53,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:58:53,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:58:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672571243] [2023-08-23 23:58:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:58:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:58:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:58:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:58:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:58:53,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 382 [2023-08-23 23:58:53,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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) [2023-08-23 23:58:53,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:58:53,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 382 [2023-08-23 23:58:53,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:59:27,591 INFO L124 PetriNetUnfolderBase]: 411276/561314 cut-off events. [2023-08-23 23:59:27,591 INFO L125 PetriNetUnfolderBase]: For 20950/20950 co-relation queries the response was YES. [2023-08-23 23:59:28,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108130 conditions, 561314 events. 411276/561314 cut-off events. For 20950/20950 co-relation queries the response was YES. Maximal size of possible extension queue 10645. Compared 4262793 event pairs, 302497 based on Foata normal form. 85320/609593 useless extension candidates. Maximal degree in co-relation 94407. Up to 535317 conditions per place. [2023-08-23 23:59:29,378 INFO L140 encePairwiseOnDemand]: 353/382 looper letters, 54 selfloop transitions, 2 changer transitions 11/78 dead transitions. [2023-08-23 23:59:29,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-08-23 23:59:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:59:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:59:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-23 23:59:29,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523560209424084 [2023-08-23 23:59:29,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-23 23:59:29,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-23 23:59:29,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:59:29,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-23 23:59:29,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-08-23 23:59:29,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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) [2023-08-23 23:59:29,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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) [2023-08-23 23:59:29,383 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 633 transitions. [2023-08-23 23:59:29,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-08-23 23:59:29,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:59:29,387 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2023-08-23 23:59:29,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-08-23 23:59:29,388 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-23 23:59:29,388 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2023-08-23 23:59:29,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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) [2023-08-23 23:59:29,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:29,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:59:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 23:59:29,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:29,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -522492419, now seen corresponding path program 1 times [2023-08-23 23:59:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629196102] [2023-08-23 23:59:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:59:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629196102] [2023-08-23 23:59:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629196102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:59:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420140399] [2023-08-23 23:59:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:29,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:59:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:59:29,414 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) [2023-08-23 23:59:29,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-23 23:59:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:29,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:59:29,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:59:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:59:29,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:59:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:59:29,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420140399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:59:29,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:59:29,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:59:29,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854857899] [2023-08-23 23:59:29,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:59:29,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:59:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:59:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:59:29,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 382 [2023-08-23 23:59:29,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 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) [2023-08-23 23:59:29,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:29,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 382 [2023-08-23 23:59:29,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:59:43,420 INFO L124 PetriNetUnfolderBase]: 191482/256643 cut-off events. [2023-08-23 23:59:43,420 INFO L125 PetriNetUnfolderBase]: For 22262/22262 co-relation queries the response was YES. [2023-08-23 23:59:43,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533248 conditions, 256643 events. 191482/256643 cut-off events. For 22262/22262 co-relation queries the response was YES. Maximal size of possible extension queue 5485. Compared 1793132 event pairs, 8016 based on Foata normal form. 1110/257752 useless extension candidates. Maximal degree in co-relation 478718. Up to 163477 conditions per place. [2023-08-23 23:59:44,848 INFO L140 encePairwiseOnDemand]: 378/382 looper letters, 136 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2023-08-23 23:59:44,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 636 flow [2023-08-23 23:59:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:59:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:59:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1213 transitions. [2023-08-23 23:59:44,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292321116928447 [2023-08-23 23:59:44,851 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1213 transitions. [2023-08-23 23:59:44,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1213 transitions. [2023-08-23 23:59:44,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:59:44,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1213 transitions. [2023-08-23 23:59:44,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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) [2023-08-23 23:59:44,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 382.0) internal successors, (2674), 7 states have internal predecessors, (2674), 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) [2023-08-23 23:59:44,856 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 382.0) internal successors, (2674), 7 states have internal predecessors, (2674), 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) [2023-08-23 23:59:44,857 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1213 transitions. [2023-08-23 23:59:44,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 636 flow [2023-08-23 23:59:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 153 transitions, 622 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-23 23:59:44,867 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-23 23:59:44,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-23 23:59:44,867 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-23 23:59:44,868 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-23 23:59:44,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 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) [2023-08-23 23:59:44,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:44,868 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-23 23:59:44,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-23 23:59:45,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:59:45,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:45,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1470896633, now seen corresponding path program 1 times [2023-08-23 23:59:45,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:45,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850166035] [2023-08-23 23:59:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:45,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:45,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:59:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:45,106 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:59:45,106 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:59:45,106 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:59:45,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:59:45,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 23:59:45,107 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:59:45,107 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:59:45,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-23 23:59:45,128 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-23 23:59:45,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 259 transitions, 578 flow [2023-08-23 23:59:45,201 INFO L124 PetriNetUnfolderBase]: 140/919 cut-off events. [2023-08-23 23:59:45,201 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-23 23:59:45,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 919 events. 140/919 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4185 event pairs, 23 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 626. Up to 80 conditions per place. [2023-08-23 23:59:45,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 259 transitions, 578 flow [2023-08-23 23:59:45,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 259 transitions, 578 flow [2023-08-23 23:59:45,212 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:59:45,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 259 transitions, 578 flow [2023-08-23 23:59:45,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 259 transitions, 578 flow [2023-08-23 23:59:45,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 259 transitions, 578 flow [2023-08-23 23:59:45,283 INFO L124 PetriNetUnfolderBase]: 140/919 cut-off events. [2023-08-23 23:59:45,283 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-23 23:59:45,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 919 events. 140/919 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4185 event pairs, 23 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 626. Up to 80 conditions per place. [2023-08-23 23:59:45,306 INFO L119 LiptonReduction]: Number of co-enabled transitions 39270 [2023-08-23 23:59:47,755 INFO L134 LiptonReduction]: Checked pairs total: 101666 [2023-08-23 23:59:47,755 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-23 23:59:47,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:59:47,762 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=false, 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;@63e3479e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:59:47,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:59:47,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:59:47,768 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-23 23:59:47,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:47,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:47,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:59:47,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:47,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 61912378, now seen corresponding path program 1 times [2023-08-23 23:59:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:47,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024900656] [2023-08-23 23:59:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:59:47,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:47,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024900656] [2023-08-23 23:59:47,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024900656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:59:47,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:59:47,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:59:47,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096685143] [2023-08-23 23:59:47,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:59:47,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:59:47,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:59:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:59:47,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 439 [2023-08-23 23:59:47,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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) [2023-08-23 23:59:47,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:47,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 439 [2023-08-23 23:59:47,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand