/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_22-deref_read_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:00:21,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:00:21,161 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 [2023-08-24 00:00:21,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:00:21,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:00:21,200 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:00:21,201 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:00:21,205 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:00:21,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:00:21,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:00:21,210 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:00:21,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:00:21,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:00:21,211 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:00:21,212 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:00:21,212 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:00:21,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:00:21,212 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:00:21,212 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:00:21,213 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:00:21,213 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:00:21,214 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:00:21,214 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:00:21,214 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:00:21,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:00:21,215 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:00:21,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:00:21,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:00:21,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:00:21,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:00:21,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:00:21,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:00:21,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:00:21,217 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:00:21,217 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:00:21,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:00:21,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:00:21,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:00:21,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:00:21,539 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:00:21,541 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:00:21,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-24 00:00:22,893 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:00:23,222 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:00:23,223 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-24 00:00:23,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc17979e/7cee407342044fd3a8f9890fdfeb9287/FLAGcb7fea25e [2023-08-24 00:00:23,258 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc17979e/7cee407342044fd3a8f9890fdfeb9287 [2023-08-24 00:00:23,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:00:23,264 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:00:23,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:00:23,266 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:00:23,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:00:23,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec716ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23, skipping insertion in model container [2023-08-24 00:00:23,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,320 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:00:23,636 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_22-deref_read_racefree.i[30176,30189] [2023-08-24 00:00:23,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:00:23,666 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:00:23,694 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:00:23,695 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:00:23,715 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_22-deref_read_racefree.i[30176,30189] [2023-08-24 00:00:23,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:00:23,755 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:00:23,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23 WrapperNode [2023-08-24 00:00:23,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:00:23,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:00:23,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:00:23,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:00:23,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,796 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-08-24 00:00:23,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:00:23,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:00:23,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:00:23,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:00:23,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,822 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:00:23,822 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:00:23,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:00:23,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:00:23,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (1/1) ... [2023-08-24 00:00:23,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:00:23,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:00:23,870 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) [2023-08-24 00:00:23,892 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 [2023-08-24 00:00:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:00:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:00:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:00:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:00:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:00:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:00:23,907 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:00:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:00:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:00:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:00:23,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:00:23,908 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:00:24,016 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:00:24,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:00:24,166 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:00:24,172 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:00:24,173 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-24 00:00:24,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:00:24 BoogieIcfgContainer [2023-08-24 00:00:24,175 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:00:24,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:00:24,177 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:00:24,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:00:24,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:00:23" (1/3) ... [2023-08-24 00:00:24,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ac436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:00:24, skipping insertion in model container [2023-08-24 00:00:24,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:00:23" (2/3) ... [2023-08-24 00:00:24,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ac436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:00:24, skipping insertion in model container [2023-08-24 00:00:24,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:00:24" (3/3) ... [2023-08-24 00:00:24,183 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-08-24 00:00:24,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:00:24,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 00:00:24,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:00:24,255 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 00:00:24,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 101 transitions, 207 flow [2023-08-24 00:00:24,337 INFO L124 PetriNetUnfolderBase]: 14/133 cut-off events. [2023-08-24 00:00:24,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:24,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 133 events. 14/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 291 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-24 00:00:24,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 101 transitions, 207 flow [2023-08-24 00:00:24,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 101 transitions, 207 flow [2023-08-24 00:00:24,352 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:00:24,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 101 transitions, 207 flow [2023-08-24 00:00:24,362 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 101 transitions, 207 flow [2023-08-24 00:00:24,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 101 transitions, 207 flow [2023-08-24 00:00:24,411 INFO L124 PetriNetUnfolderBase]: 14/133 cut-off events. [2023-08-24 00:00:24,411 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:24,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 133 events. 14/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 291 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-24 00:00:24,415 INFO L119 LiptonReduction]: Number of co-enabled transitions 2432 [2023-08-24 00:00:27,260 INFO L134 LiptonReduction]: Checked pairs total: 4475 [2023-08-24 00:00:27,260 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-24 00:00:27,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:00:27,279 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;@f3510af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:00:27,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:00:27,282 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:00:27,282 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:00:27,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:27,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:27,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:00:27,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:27,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash 12084157, now seen corresponding path program 1 times [2023-08-24 00:00:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:27,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233731345] [2023-08-24 00:00:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:27,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:27,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:27,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233731345] [2023-08-24 00:00:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233731345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:00:27,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:00:27,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:00:27,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203825393] [2023-08-24 00:00:27,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:00:27,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:00:27,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:00:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:00:27,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2023-08-24 00:00:27,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2023-08-24 00:00:27,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:27,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2023-08-24 00:00:27,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:00:27,631 INFO L124 PetriNetUnfolderBase]: 72/176 cut-off events. [2023-08-24 00:00:27,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:27,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 176 events. 72/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 730 event pairs, 0 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 324. Up to 153 conditions per place. [2023-08-24 00:00:27,634 INFO L140 encePairwiseOnDemand]: 175/186 looper letters, 24 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2023-08-24 00:00:27,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 127 flow [2023-08-24 00:00:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:00:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:00:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-24 00:00:27,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514336917562724 [2023-08-24 00:00:27,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-24 00:00:27,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-24 00:00:27,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:00:27,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-24 00:00:27,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2023-08-24 00:00:27,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 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) [2023-08-24 00:00:27,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 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) [2023-08-24 00:00:27,675 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 287 transitions. [2023-08-24 00:00:27,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 127 flow [2023-08-24 00:00:27,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:00:27,680 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2023-08-24 00:00:27,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-24 00:00:27,686 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-24 00:00:27,686 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2023-08-24 00:00:27,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2023-08-24 00:00:27,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:27,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:00:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:00:27,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:27,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1284239215, now seen corresponding path program 1 times [2023-08-24 00:00:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539247654] [2023-08-24 00:00:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:27,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:00:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:27,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:00:27,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:00:27,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:00:27,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:00:27,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:00:27,775 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:00:27,778 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:00:27,778 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:00:27,798 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 00:00:27,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 134 transitions, 280 flow [2023-08-24 00:00:27,838 INFO L124 PetriNetUnfolderBase]: 24/203 cut-off events. [2023-08-24 00:00:27,838 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 00:00:27,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 566 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-24 00:00:27,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 134 transitions, 280 flow [2023-08-24 00:00:27,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 134 transitions, 280 flow [2023-08-24 00:00:27,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:00:27,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 134 transitions, 280 flow [2023-08-24 00:00:27,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 134 transitions, 280 flow [2023-08-24 00:00:27,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 134 transitions, 280 flow [2023-08-24 00:00:27,863 INFO L124 PetriNetUnfolderBase]: 24/203 cut-off events. [2023-08-24 00:00:27,864 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 00:00:27,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 566 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-24 00:00:27,870 INFO L119 LiptonReduction]: Number of co-enabled transitions 6976 [2023-08-24 00:00:30,670 INFO L134 LiptonReduction]: Checked pairs total: 13909 [2023-08-24 00:00:30,671 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-24 00:00:30,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:00:30,673 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;@f3510af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:00:30,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:00:30,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:00:30,676 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:00:30,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:30,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:30,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:00:30,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:30,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:30,677 INFO L85 PathProgramCache]: Analyzing trace with hash 20427860, now seen corresponding path program 1 times [2023-08-24 00:00:30,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:30,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676636795] [2023-08-24 00:00:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:30,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676636795] [2023-08-24 00:00:30,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676636795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:00:30,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:00:30,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:00:30,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320627920] [2023-08-24 00:00:30,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:00:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:00:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:00:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:00:30,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 238 [2023-08-24 00:00:30,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-08-24 00:00:30,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:30,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 238 [2023-08-24 00:00:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:00:31,024 INFO L124 PetriNetUnfolderBase]: 1441/2556 cut-off events. [2023-08-24 00:00:31,024 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 00:00:31,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 2556 events. 1441/2556 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 14566 event pairs, 640 based on Foata normal form. 360/2676 useless extension candidates. Maximal degree in co-relation 472. Up to 2332 conditions per place. [2023-08-24 00:00:31,036 INFO L140 encePairwiseOnDemand]: 221/238 looper letters, 34 selfloop transitions, 2 changer transitions 3/46 dead transitions. [2023-08-24 00:00:31,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 182 flow [2023-08-24 00:00:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:00:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:00:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-24 00:00:31,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336134453781513 [2023-08-24 00:00:31,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-24 00:00:31,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-24 00:00:31,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:00:31,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-24 00:00:31,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-08-24 00:00:31,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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) [2023-08-24 00:00:31,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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) [2023-08-24 00:00:31,045 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 3 states and 381 transitions. [2023-08-24 00:00:31,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 182 flow [2023-08-24 00:00:31,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-24 00:00:31,048 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 86 flow [2023-08-24 00:00:31,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-08-24 00:00:31,048 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-24 00:00:31,049 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 86 flow [2023-08-24 00:00:31,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-08-24 00:00:31,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:31,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:00:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:00:31,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:31,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1141282113, now seen corresponding path program 1 times [2023-08-24 00:00:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:31,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439412540] [2023-08-24 00:00:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:31,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439412540] [2023-08-24 00:00:31,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439412540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:00:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493855929] [2023-08-24 00:00:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:31,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:00:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:00:31,181 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) [2023-08-24 00:00:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 00:00:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:31,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:00:31,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:00:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:31,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:00:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:31,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493855929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:00:31,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:00:31,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:00:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176830072] [2023-08-24 00:00:31,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:00:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:00:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:00:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:00:31,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 238 [2023-08-24 00:00:31,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:31,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:31,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 238 [2023-08-24 00:00:31,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:00:31,492 INFO L124 PetriNetUnfolderBase]: 421/856 cut-off events. [2023-08-24 00:00:31,493 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:00:31,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 856 events. 421/856 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4405 event pairs, 0 based on Foata normal form. 100/956 useless extension candidates. Maximal degree in co-relation 182. Up to 502 conditions per place. [2023-08-24 00:00:31,498 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-24 00:00:31,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2023-08-24 00:00:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:00:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:00:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2023-08-24 00:00:31,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2023-08-24 00:00:31,501 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2023-08-24 00:00:31,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2023-08-24 00:00:31,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:00:31,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2023-08-24 00:00:31,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 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) [2023-08-24 00:00:31,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 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) [2023-08-24 00:00:31,505 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 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) [2023-08-24 00:00:31,505 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 86 flow. Second operand 5 states and 588 transitions. [2023-08-24 00:00:31,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2023-08-24 00:00:31,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:00:31,508 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-24 00:00:31,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, 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} [2023-08-24 00:00:31,511 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-24 00:00:31,511 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-24 00:00:31,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:31,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:31,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:00:31,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 00:00:31,717 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 [2023-08-24 00:00:31,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:31,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash 391367796, now seen corresponding path program 1 times [2023-08-24 00:00:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:31,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959953167] [2023-08-24 00:00:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:31,736 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:00:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:31,761 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:00:31,761 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:00:31,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:00:31,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:00:31,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:00:31,762 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:00:31,763 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:00:31,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:00:31,787 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 00:00:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 167 transitions, 355 flow [2023-08-24 00:00:31,814 INFO L124 PetriNetUnfolderBase]: 34/273 cut-off events. [2023-08-24 00:00:31,814 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 00:00:31,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 273 events. 34/273 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 825 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2023-08-24 00:00:31,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 167 transitions, 355 flow [2023-08-24 00:00:31,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 167 transitions, 355 flow [2023-08-24 00:00:31,818 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:00:31,818 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 167 transitions, 355 flow [2023-08-24 00:00:31,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 167 transitions, 355 flow [2023-08-24 00:00:31,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 167 transitions, 355 flow [2023-08-24 00:00:31,840 INFO L124 PetriNetUnfolderBase]: 34/273 cut-off events. [2023-08-24 00:00:31,841 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 00:00:31,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 273 events. 34/273 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 825 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2023-08-24 00:00:31,850 INFO L119 LiptonReduction]: Number of co-enabled transitions 13632 [2023-08-24 00:00:34,636 INFO L134 LiptonReduction]: Checked pairs total: 29300 [2023-08-24 00:00:34,636 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-24 00:00:34,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:00:34,638 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;@f3510af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:00:34,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:00:34,640 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:00:34,640 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:00:34,640 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:34,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:34,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:00:34,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:34,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash 30336861, now seen corresponding path program 1 times [2023-08-24 00:00:34,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:34,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935973798] [2023-08-24 00:00:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:34,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:34,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:34,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935973798] [2023-08-24 00:00:34,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935973798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:00:34,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:00:34,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:00:34,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921214178] [2023-08-24 00:00:34,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:00:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:00:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:00:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:00:34,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 289 [2023-08-24 00:00:34,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 67 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2023-08-24 00:00:34,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:34,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 289 [2023-08-24 00:00:34,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:00:36,999 INFO L124 PetriNetUnfolderBase]: 20233/30229 cut-off events. [2023-08-24 00:00:37,000 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2023-08-24 00:00:37,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59120 conditions, 30229 events. 20233/30229 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 202964 event pairs, 12969 based on Foata normal form. 5058/33207 useless extension candidates. Maximal degree in co-relation 4952. Up to 28406 conditions per place. [2023-08-24 00:00:37,166 INFO L140 encePairwiseOnDemand]: 266/289 looper letters, 42 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2023-08-24 00:00:37,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 229 flow [2023-08-24 00:00:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:00:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:00:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-24 00:00:37,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5455594002306805 [2023-08-24 00:00:37,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-24 00:00:37,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-24 00:00:37,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:00:37,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-24 00:00:37,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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) [2023-08-24 00:00:37,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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) [2023-08-24 00:00:37,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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) [2023-08-24 00:00:37,172 INFO L175 Difference]: Start difference. First operand has 54 places, 67 transitions, 155 flow. Second operand 3 states and 473 transitions. [2023-08-24 00:00:37,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 229 flow [2023-08-24 00:00:37,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 223 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-24 00:00:37,177 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 115 flow [2023-08-24 00:00:37,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-24 00:00:37,180 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-24 00:00:37,180 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 115 flow [2023-08-24 00:00:37,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2023-08-24 00:00:37,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:37,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:00:37,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:00:37,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:37,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash -38898056, now seen corresponding path program 1 times [2023-08-24 00:00:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:37,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817101440] [2023-08-24 00:00:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:37,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817101440] [2023-08-24 00:00:37,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817101440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:00:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112847142] [2023-08-24 00:00:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:37,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:00:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:00:37,237 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) [2023-08-24 00:00:37,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 00:00:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:37,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:00:37,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:00:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:37,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:00:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:37,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112847142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:00:37,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:00:37,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:00:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289751252] [2023-08-24 00:00:37,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:00:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:00:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:00:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:00:37,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 289 [2023-08-24 00:00:37,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:37,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:37,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 289 [2023-08-24 00:00:37,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:00:38,238 INFO L124 PetriNetUnfolderBase]: 6205/10135 cut-off events. [2023-08-24 00:00:38,239 INFO L125 PetriNetUnfolderBase]: For 1008/1008 co-relation queries the response was YES. [2023-08-24 00:00:38,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21104 conditions, 10135 events. 6205/10135 cut-off events. For 1008/1008 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 67706 event pairs, 0 based on Foata normal form. 909/11043 useless extension candidates. Maximal degree in co-relation 2406. Up to 5958 conditions per place. [2023-08-24 00:00:38,301 INFO L140 encePairwiseOnDemand]: 286/289 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-24 00:00:38,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 389 flow [2023-08-24 00:00:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:00:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:00:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 887 transitions. [2023-08-24 00:00:38,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115340253748558 [2023-08-24 00:00:38,304 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 887 transitions. [2023-08-24 00:00:38,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 887 transitions. [2023-08-24 00:00:38,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:00:38,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 887 transitions. [2023-08-24 00:00:38,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:38,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 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) [2023-08-24 00:00:38,310 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 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) [2023-08-24 00:00:38,310 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 115 flow. Second operand 6 states and 887 transitions. [2023-08-24 00:00:38,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 389 flow [2023-08-24 00:00:38,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:00:38,318 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-24 00:00:38,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, 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} [2023-08-24 00:00:38,320 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-24 00:00:38,322 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-24 00:00:38,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:38,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:38,323 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 00:00:38,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 00:00:38,528 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 [2023-08-24 00:00:38,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:38,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 738447463, now seen corresponding path program 1 times [2023-08-24 00:00:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:38,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949310748] [2023-08-24 00:00:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:38,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:38,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:00:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:38,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:00:38,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:00:38,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:00:38,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:00:38,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 00:00:38,580 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:00:38,581 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:00:38,581 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:00:38,605 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 00:00:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 200 transitions, 432 flow [2023-08-24 00:00:38,644 INFO L124 PetriNetUnfolderBase]: 44/343 cut-off events. [2023-08-24 00:00:38,644 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-24 00:00:38,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 343 events. 44/343 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1096 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 281. Up to 10 conditions per place. [2023-08-24 00:00:38,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 200 transitions, 432 flow [2023-08-24 00:00:38,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 200 transitions, 432 flow [2023-08-24 00:00:38,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:00:38,649 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 200 transitions, 432 flow [2023-08-24 00:00:38,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 200 transitions, 432 flow [2023-08-24 00:00:38,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 200 transitions, 432 flow [2023-08-24 00:00:38,684 INFO L124 PetriNetUnfolderBase]: 44/343 cut-off events. [2023-08-24 00:00:38,684 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-24 00:00:38,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 343 events. 44/343 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1096 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 281. Up to 10 conditions per place. [2023-08-24 00:00:38,702 INFO L119 LiptonReduction]: Number of co-enabled transitions 22400 [2023-08-24 00:00:41,787 INFO L134 LiptonReduction]: Checked pairs total: 51430 [2023-08-24 00:00:41,787 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-24 00:00:41,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:00:41,789 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;@f3510af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:00:41,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:00:41,791 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:00:41,791 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:00:41,791 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:41,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:41,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:00:41,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:41,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash 41945068, now seen corresponding path program 1 times [2023-08-24 00:00:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:41,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948749415] [2023-08-24 00:00:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:41,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:41,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948749415] [2023-08-24 00:00:41,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948749415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:00:41,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:00:41,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:00:41,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88055971] [2023-08-24 00:00:41,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:00:41,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:00:41,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:41,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:00:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:00:41,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 344 [2023-08-24 00:00:41,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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) [2023-08-24 00:00:41,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:41,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 344 [2023-08-24 00:00:41,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:01:20,868 INFO L124 PetriNetUnfolderBase]: 452675/588210 cut-off events. [2023-08-24 00:01:20,869 INFO L125 PetriNetUnfolderBase]: For 13880/13880 co-relation queries the response was YES. [2023-08-24 00:01:21,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180015 conditions, 588210 events. 452675/588210 cut-off events. For 13880/13880 co-relation queries the response was YES. Maximal size of possible extension queue 10263. Compared 3871165 event pairs, 334100 based on Foata normal form. 61092/618842 useless extension candidates. Maximal degree in co-relation 94284. Up to 584426 conditions per place. [2023-08-24 00:01:23,696 INFO L140 encePairwiseOnDemand]: 315/344 looper letters, 58 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2023-08-24 00:01:23,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 298 flow [2023-08-24 00:01:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:01:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:01:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-24 00:01:23,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552325581395349 [2023-08-24 00:01:23,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-24 00:01:23,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-24 00:01:23,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:01:23,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-24 00:01:23,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 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) [2023-08-24 00:01:23,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-08-24 00:01:23,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-08-24 00:01:23,711 INFO L175 Difference]: Start difference. First operand has 68 places, 85 transitions, 202 flow. Second operand 3 states and 573 transitions. [2023-08-24 00:01:23,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 298 flow [2023-08-24 00:01:23,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 286 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-24 00:01:23,728 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 144 flow [2023-08-24 00:01:23,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-08-24 00:01:23,730 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-24 00:01:23,730 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 144 flow [2023-08-24 00:01:23,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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) [2023-08-24 00:01:23,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:01:23,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:01:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:01:23,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:01:23,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:01:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1356226956, now seen corresponding path program 1 times [2023-08-24 00:01:23,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:01:23,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679379187] [2023-08-24 00:01:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:01:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:01:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:01:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:01:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:01:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679379187] [2023-08-24 00:01:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679379187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:01:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308107075] [2023-08-24 00:01:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:01:23,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:01:23,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:01:23,784 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) [2023-08-24 00:01:23,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 00:01:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:01:23,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:01:23,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:01:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:01:23,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:01:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:01:23,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308107075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:01:23,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:01:23,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:01:23,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443409342] [2023-08-24 00:01:23,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:01:23,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:01:23,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:01:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:01:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:01:23,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 344 [2023-08-24 00:01:23,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 161.28571428571428) internal successors, (1129), 7 states have internal predecessors, (1129), 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) [2023-08-24 00:01:23,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:01:23,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 344 [2023-08-24 00:01:23,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:01:46,617 INFO L124 PetriNetUnfolderBase]: 286856/375777 cut-off events. [2023-08-24 00:01:46,618 INFO L125 PetriNetUnfolderBase]: For 15992/15992 co-relation queries the response was YES. [2023-08-24 00:01:47,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779656 conditions, 375777 events. 286856/375777 cut-off events. For 15992/15992 co-relation queries the response was YES. Maximal size of possible extension queue 7008. Compared 2500731 event pairs, 12196 based on Foata normal form. 1330/377107 useless extension candidates. Maximal degree in co-relation 699944. Up to 246357 conditions per place. [2023-08-24 00:01:48,653 INFO L140 encePairwiseOnDemand]: 340/344 looper letters, 146 selfloop transitions, 6 changer transitions 0/159 dead transitions. [2023-08-24 00:01:48,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 159 transitions, 656 flow [2023-08-24 00:01:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:01:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:01:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1109 transitions. [2023-08-24 00:01:48,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373062015503876 [2023-08-24 00:01:48,657 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1109 transitions. [2023-08-24 00:01:48,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1109 transitions. [2023-08-24 00:01:48,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:01:48,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1109 transitions. [2023-08-24 00:01:48,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.83333333333334) internal successors, (1109), 6 states have internal predecessors, (1109), 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) [2023-08-24 00:01:48,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 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) [2023-08-24 00:01:48,664 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 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) [2023-08-24 00:01:48,664 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 144 flow. Second operand 6 states and 1109 transitions. [2023-08-24 00:01:48,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 159 transitions, 656 flow [2023-08-24 00:01:48,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 159 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:01:48,672 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-24 00:01:48,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, 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} [2023-08-24 00:01:48,672 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2023-08-24 00:01:48,673 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-24 00:01:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 161.28571428571428) internal successors, (1129), 7 states have internal predecessors, (1129), 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) [2023-08-24 00:01:48,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:01:48,673 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 00:01:48,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 00:01:48,877 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 [2023-08-24 00:01:48,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:01:48,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:01:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1768765408, now seen corresponding path program 1 times [2023-08-24 00:01:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:01:48,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125697627] [2023-08-24 00:01:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:01:48,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:01:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:01:48,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:01:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:01:48,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:01:48,908 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:01:48,908 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:01:48,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:01:48,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:01:48,908 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:01:48,909 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:01:48,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 00:01:49,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 00:01:49,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 233 transitions, 511 flow [2023-08-24 00:01:49,215 INFO L124 PetriNetUnfolderBase]: 54/413 cut-off events. [2023-08-24 00:01:49,216 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-24 00:01:49,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 413 events. 54/413 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1356 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 356. Up to 12 conditions per place. [2023-08-24 00:01:49,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 233 transitions, 511 flow [2023-08-24 00:01:49,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 233 transitions, 511 flow [2023-08-24 00:01:49,223 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:01:49,223 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 233 transitions, 511 flow [2023-08-24 00:01:49,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 233 transitions, 511 flow [2023-08-24 00:01:49,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 233 transitions, 511 flow [2023-08-24 00:01:49,263 INFO L124 PetriNetUnfolderBase]: 54/413 cut-off events. [2023-08-24 00:01:49,263 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-24 00:01:49,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 413 events. 54/413 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1356 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 356. Up to 12 conditions per place. [2023-08-24 00:01:49,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 33280 [2023-08-24 00:01:52,349 INFO L134 LiptonReduction]: Checked pairs total: 83530 [2023-08-24 00:01:52,349 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-24 00:01:52,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:01:52,351 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;@f3510af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:01:52,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:01:52,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:01:52,353 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:01:52,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:01:52,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:01:52,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:01:52,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:01:52,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:01:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 55210059, now seen corresponding path program 1 times [2023-08-24 00:01:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:01:52,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566631845] [2023-08-24 00:01:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:01:52,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:01:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:01:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:01:52,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:01:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566631845] [2023-08-24 00:01:52,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566631845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:01:52,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:01:52,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:01:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784116061] [2023-08-24 00:01:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:01:52,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:01:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:01:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:01:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:01:52,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 398 [2023-08-24 00:01:52,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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) [2023-08-24 00:01:52,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:01:52,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 398 [2023-08-24 00:01:52,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand