/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:35:35,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:35:36,065 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-SemanticLbe.epf [2023-11-17 11:35:36,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:35:36,090 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:35:36,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:35:36,091 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:35:36,091 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:35:36,092 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:35:36,094 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:35:36,095 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:35:36,095 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:35:36,095 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:35:36,096 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:35:36,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:35:36,097 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:35:36,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:35:36,097 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:35:36,097 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:35:36,097 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:35:36,097 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:35:36,098 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:35:36,098 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:35:36,098 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:35:36,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:35:36,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:35:36,099 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:35:36,099 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:35:36,099 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:35:36,099 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:35:36,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:35:36,100 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:35:36,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:35:36,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:35:36,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:35:36,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:35:36,322 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:35:36,322 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:35:36,323 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-11-17 11:35:37,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:35:37,632 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:35:37,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-11-17 11:35:37,648 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9111645/7a3170d608cc435dbd4fb8bca92da077/FLAG29118808d [2023-11-17 11:35:37,662 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9111645/7a3170d608cc435dbd4fb8bca92da077 [2023-11-17 11:35:37,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:35:37,665 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:35:37,665 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:35:37,665 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:35:37,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:35:37,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:35:37" (1/1) ... [2023-11-17 11:35:37,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c17150a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:37, skipping insertion in model container [2023-11-17 11:35:37,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:35:37" (1/1) ... [2023-11-17 11:35:37,712 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:35:37,930 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_05-lockfuns_racefree.i[30176,30189] [2023-11-17 11:35:37,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:35:37,957 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:35:37,994 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_05-lockfuns_racefree.i[30176,30189] [2023-11-17 11:35:37,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:35:38,028 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:35:38,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38 WrapperNode [2023-11-17 11:35:38,029 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:35:38,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:35:38,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:35:38,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:35:38,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,069 INFO L138 Inliner]: procedures = 173, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 122 [2023-11-17 11:35:38,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:35:38,070 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:35:38,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:35:38,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:35:38,077 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:35:38,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:35:38,110 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:35:38,110 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:35:38,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (1/1) ... [2023-11-17 11:35:38,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:35:38,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:38,160 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) [2023-11-17 11:35:38,177 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 [2023-11-17 11:35:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:35:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:35:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:35:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:35:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:35:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:35:38,204 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:35:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:35:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:35:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:35:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:35:38,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:35:38,205 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:35:38,326 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:35:38,327 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:35:38,484 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:35:38,595 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:35:38,595 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 11:35:38,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:35:38 BoogieIcfgContainer [2023-11-17 11:35:38,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:35:38,598 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:35:38,598 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:35:38,600 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:35:38,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:35:37" (1/3) ... [2023-11-17 11:35:38,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9b8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:35:38, skipping insertion in model container [2023-11-17 11:35:38,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:38" (2/3) ... [2023-11-17 11:35:38,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9b8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:35:38, skipping insertion in model container [2023-11-17 11:35:38,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:35:38" (3/3) ... [2023-11-17 11:35:38,602 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-11-17 11:35:38,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:35:38,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:35:38,613 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:35:38,636 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:35:38,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 51 transitions, 109 flow [2023-11-17 11:35:38,682 INFO L124 PetriNetUnfolderBase]: 13/72 cut-off events. [2023-11-17 11:35:38,682 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:35:38,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 13/72 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 238 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-11-17 11:35:38,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 51 transitions, 109 flow [2023-11-17 11:35:38,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 49 transitions, 102 flow [2023-11-17 11:35:38,696 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:38,710 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 43 places, 49 transitions, 102 flow [2023-11-17 11:35:38,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 43 places, 49 transitions, 102 flow [2023-11-17 11:35:38,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 49 transitions, 102 flow [2023-11-17 11:35:38,727 INFO L124 PetriNetUnfolderBase]: 12/70 cut-off events. [2023-11-17 11:35:38,727 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:38,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 70 events. 12/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-11-17 11:35:38,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 1104 [2023-11-17 11:35:39,216 INFO L134 LiptonReduction]: Checked pairs total: 2180 [2023-11-17 11:35:39,216 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-11-17 11:35:39,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:39,237 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=LoopHeads, 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;@22c33a99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:39,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:39,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:39,242 INFO L124 PetriNetUnfolderBase]: 3/11 cut-off events. [2023-11-17 11:35:39,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:39,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:39,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:39,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:39,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash 10647456, now seen corresponding path program 1 times [2023-11-17 11:35:39,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:39,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310681696] [2023-11-17 11:35:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:39,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:39,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310681696] [2023-11-17 11:35:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310681696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:39,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:39,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:39,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451580763] [2023-11-17 11:35:39,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:39,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:39,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 86 [2023-11-17 11:35:39,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-17 11:35:39,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:39,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 86 [2023-11-17 11:35:39,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:39,471 INFO L124 PetriNetUnfolderBase]: 80/191 cut-off events. [2023-11-17 11:35:39,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:39,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 191 events. 80/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 770 event pairs, 0 based on Foata normal form. 11/175 useless extension candidates. Maximal degree in co-relation 357. Up to 171 conditions per place. [2023-11-17 11:35:39,473 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 22 selfloop transitions, 2 changer transitions 5/31 dead transitions. [2023-11-17 11:35:39,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 124 flow [2023-11-17 11:35:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-17 11:35:39,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2023-11-17 11:35:39,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-17 11:35:39,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-17 11:35:39,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:39,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-17 11:35:39,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2023-11-17 11:35:39,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2023-11-17 11:35:39,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2023-11-17 11:35:39,489 INFO L175 Difference]: Start difference. First operand has 25 places, 31 transitions, 66 flow. Second operand 3 states and 87 transitions. [2023-11-17 11:35:39,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 124 flow [2023-11-17 11:35:39,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:35:39,492 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 46 flow [2023-11-17 11:35:39,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=48, 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=46, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-11-17 11:35:39,495 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 11:35:39,495 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 46 flow [2023-11-17 11:35:39,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-17 11:35:39,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:39,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:35:39,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:35:39,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:39,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1566681971, now seen corresponding path program 1 times [2023-11-17 11:35:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:39,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449940046] [2023-11-17 11:35:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:39,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:39,514 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:39,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:39,536 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:39,537 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:35:39,538 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:35:39,540 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:39,540 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:35:39,553 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:35:39,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 77 transitions, 170 flow [2023-11-17 11:35:39,565 INFO L124 PetriNetUnfolderBase]: 24/126 cut-off events. [2023-11-17 11:35:39,565 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:35:39,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 126 events. 24/126 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 516 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 76. Up to 6 conditions per place. [2023-11-17 11:35:39,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 77 transitions, 170 flow [2023-11-17 11:35:39,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 77 transitions, 170 flow [2023-11-17 11:35:39,567 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:39,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 77 transitions, 170 flow [2023-11-17 11:35:39,567 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 77 transitions, 170 flow [2023-11-17 11:35:39,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 77 transitions, 170 flow [2023-11-17 11:35:39,600 INFO L124 PetriNetUnfolderBase]: 24/126 cut-off events. [2023-11-17 11:35:39,601 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:35:39,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 126 events. 24/126 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 516 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 76. Up to 6 conditions per place. [2023-11-17 11:35:39,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 3600 [2023-11-17 11:35:40,190 INFO L134 LiptonReduction]: Checked pairs total: 8105 [2023-11-17 11:35:40,191 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-11-17 11:35:40,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:40,193 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=LoopHeads, 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;@22c33a99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:40,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:40,195 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:40,195 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:35:40,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:40,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:40,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:40,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:40,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:40,196 INFO L85 PathProgramCache]: Analyzing trace with hash 14139507, now seen corresponding path program 1 times [2023-11-17 11:35:40,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:40,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913336290] [2023-11-17 11:35:40,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:40,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:40,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:40,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913336290] [2023-11-17 11:35:40,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913336290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:40,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:40,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:40,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611985546] [2023-11-17 11:35:40,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:40,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:40,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:40,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 131 [2023-11-17 11:35:40,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 50 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-17 11:35:40,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:40,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 131 [2023-11-17 11:35:40,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:40,460 INFO L124 PetriNetUnfolderBase]: 1642/2720 cut-off events. [2023-11-17 11:35:40,461 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-11-17 11:35:40,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 2720 events. 1642/2720 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 14303 event pairs, 752 based on Foata normal form. 214/2645 useless extension candidates. Maximal degree in co-relation 563. Up to 2673 conditions per place. [2023-11-17 11:35:40,468 INFO L140 encePairwiseOnDemand]: 113/131 looper letters, 32 selfloop transitions, 2 changer transitions 8/45 dead transitions. [2023-11-17 11:35:40,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 190 flow [2023-11-17 11:35:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-17 11:35:40,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3231552162849873 [2023-11-17 11:35:40,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-17 11:35:40,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-17 11:35:40,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:40,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-17 11:35:40,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2023-11-17 11:35:40,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-17 11:35:40,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-17 11:35:40,472 INFO L175 Difference]: Start difference. First operand has 38 places, 50 transitions, 116 flow. Second operand 3 states and 127 transitions. [2023-11-17 11:35:40,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 190 flow [2023-11-17 11:35:40,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:35:40,474 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 76 flow [2023-11-17 11:35:40,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=76, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-11-17 11:35:40,475 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-17 11:35:40,475 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 76 flow [2023-11-17 11:35:40,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-17 11:35:40,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:40,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:35:40,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:35:40,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:40,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash 979332830, now seen corresponding path program 1 times [2023-11-17 11:35:40,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:40,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113786620] [2023-11-17 11:35:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:40,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:40,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113786620] [2023-11-17 11:35:40,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113786620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:35:40,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31296379] [2023-11-17 11:35:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:40,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:35:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:40,518 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) [2023-11-17 11:35:40,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:35:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:40,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:35:40,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:35:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:40,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:35:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:40,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31296379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:35:40,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:35:40,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:35:40,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28866752] [2023-11-17 11:35:40,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:35:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:35:40,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:40,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:35:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:35:40,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 131 [2023-11-17 11:35:40,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2023-11-17 11:35:40,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:40,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 131 [2023-11-17 11:35:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:40,718 INFO L124 PetriNetUnfolderBase]: 376/739 cut-off events. [2023-11-17 11:35:40,719 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-17 11:35:40,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 739 events. 376/739 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3688 event pairs, 0 based on Foata normal form. 90/829 useless extension candidates. Maximal degree in co-relation 169. Up to 450 conditions per place. [2023-11-17 11:35:40,722 INFO L140 encePairwiseOnDemand]: 128/131 looper letters, 45 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-17 11:35:40,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 216 flow [2023-11-17 11:35:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:35:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:35:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2023-11-17 11:35:40,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2366412213740458 [2023-11-17 11:35:40,724 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 155 transitions. [2023-11-17 11:35:40,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 155 transitions. [2023-11-17 11:35:40,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:40,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 155 transitions. [2023-11-17 11:35:40,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2023-11-17 11:35:40,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-17 11:35:40,726 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-17 11:35:40,726 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 76 flow. Second operand 5 states and 155 transitions. [2023-11-17 11:35:40,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 216 flow [2023-11-17 11:35:40,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:35:40,728 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-11-17 11:35:40,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-11-17 11:35:40,729 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-17 11:35:40,729 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-11-17 11:35:40,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2023-11-17 11:35:40,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:40,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:35:40,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:35:40,934 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 [2023-11-17 11:35:40,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:40,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash 423654013, now seen corresponding path program 1 times [2023-11-17 11:35:40,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:40,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248477556] [2023-11-17 11:35:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:40,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:40,946 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:40,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:40,956 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:40,956 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:40,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:40,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:35:40,956 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:35:40,957 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:40,957 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:35:40,971 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:35:40,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 103 transitions, 233 flow [2023-11-17 11:35:40,984 INFO L124 PetriNetUnfolderBase]: 38/191 cut-off events. [2023-11-17 11:35:40,984 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:35:40,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 191 events. 38/191 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 841 event pairs, 1 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 137. Up to 12 conditions per place. [2023-11-17 11:35:40,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 103 transitions, 233 flow [2023-11-17 11:35:40,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 103 transitions, 233 flow [2023-11-17 11:35:40,987 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:40,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 103 transitions, 233 flow [2023-11-17 11:35:40,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 103 transitions, 233 flow [2023-11-17 11:35:40,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 103 transitions, 233 flow [2023-11-17 11:35:40,997 INFO L124 PetriNetUnfolderBase]: 38/191 cut-off events. [2023-11-17 11:35:40,998 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:35:40,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 191 events. 38/191 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 841 event pairs, 1 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 137. Up to 12 conditions per place. [2023-11-17 11:35:41,002 INFO L119 LiptonReduction]: Number of co-enabled transitions 7344 [2023-11-17 11:35:41,802 INFO L134 LiptonReduction]: Checked pairs total: 16809 [2023-11-17 11:35:41,803 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-11-17 11:35:41,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:41,812 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=LoopHeads, 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;@22c33a99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:41,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:41,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:41,814 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:35:41,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:41,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:41,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:41,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:41,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash 19003378, now seen corresponding path program 1 times [2023-11-17 11:35:41,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:41,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749802515] [2023-11-17 11:35:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:41,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:41,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749802515] [2023-11-17 11:35:41,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749802515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:41,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:41,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165188556] [2023-11-17 11:35:41,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:41,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:41,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:41,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 174 [2023-11-17 11:35:41,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-17 11:35:41,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:41,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 174 [2023-11-17 11:35:41,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:43,824 INFO L124 PetriNetUnfolderBase]: 23815/33956 cut-off events. [2023-11-17 11:35:43,824 INFO L125 PetriNetUnfolderBase]: For 1051/1051 co-relation queries the response was YES. [2023-11-17 11:35:43,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68254 conditions, 33956 events. 23815/33956 cut-off events. For 1051/1051 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 201776 event pairs, 15337 based on Foata normal form. 3053/34218 useless extension candidates. Maximal degree in co-relation 5472. Up to 33630 conditions per place. [2023-11-17 11:35:43,926 INFO L140 encePairwiseOnDemand]: 150/174 looper letters, 41 selfloop transitions, 2 changer transitions 9/56 dead transitions. [2023-11-17 11:35:43,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 243 flow [2023-11-17 11:35:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-17 11:35:43,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31417624521072796 [2023-11-17 11:35:43,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-17 11:35:43,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-17 11:35:43,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:43,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-17 11:35:43,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-11-17 11:35:43,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 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) [2023-11-17 11:35:43,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 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) [2023-11-17 11:35:43,932 INFO L175 Difference]: Start difference. First operand has 50 places, 67 transitions, 161 flow. Second operand 3 states and 164 transitions. [2023-11-17 11:35:43,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 243 flow [2023-11-17 11:35:43,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:35:43,935 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 104 flow [2023-11-17 11:35:43,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-11-17 11:35:43,937 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-17 11:35:43,938 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 104 flow [2023-11-17 11:35:43,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-17 11:35:43,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:43,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:35:43,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:35:43,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:43,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1044679438, now seen corresponding path program 1 times [2023-11-17 11:35:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844045917] [2023-11-17 11:35:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844045917] [2023-11-17 11:35:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844045917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:35:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274994351] [2023-11-17 11:35:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:43,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:35:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:43,987 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) [2023-11-17 11:35:44,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:35:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:44,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:35:44,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:35:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:44,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:35:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:44,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274994351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:35:44,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:35:44,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:35:44,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658265436] [2023-11-17 11:35:44,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:35:44,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:35:44,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:35:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:35:44,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 174 [2023-11-17 11:35:44,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 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) [2023-11-17 11:35:44,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:44,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 174 [2023-11-17 11:35:44,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:44,621 INFO L124 PetriNetUnfolderBase]: 5560/8785 cut-off events. [2023-11-17 11:35:44,622 INFO L125 PetriNetUnfolderBase]: For 3482/3482 co-relation queries the response was YES. [2023-11-17 11:35:44,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17993 conditions, 8785 events. 5560/8785 cut-off events. For 3482/3482 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 54355 event pairs, 630 based on Foata normal form. 819/9595 useless extension candidates. Maximal degree in co-relation 2053. Up to 5346 conditions per place. [2023-11-17 11:35:44,659 INFO L140 encePairwiseOnDemand]: 171/174 looper letters, 79 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-17 11:35:44,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 368 flow [2023-11-17 11:35:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:35:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:35:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 254 transitions. [2023-11-17 11:35:44,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24329501915708812 [2023-11-17 11:35:44,660 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 254 transitions. [2023-11-17 11:35:44,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 254 transitions. [2023-11-17 11:35:44,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:44,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 254 transitions. [2023-11-17 11:35:44,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 42.333333333333336) internal successors, (254), 6 states have internal predecessors, (254), 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) [2023-11-17 11:35:44,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 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) [2023-11-17 11:35:44,663 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 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) [2023-11-17 11:35:44,663 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 104 flow. Second operand 6 states and 254 transitions. [2023-11-17 11:35:44,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 368 flow [2023-11-17 11:35:44,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 364 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:35:44,666 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 104 flow [2023-11-17 11:35:44,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-17 11:35:44,666 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-17 11:35:44,667 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 104 flow [2023-11-17 11:35:44,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 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) [2023-11-17 11:35:44,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:44,667 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:35:44,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:35:44,872 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 [2023-11-17 11:35:44,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:44,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1907240530, now seen corresponding path program 1 times [2023-11-17 11:35:44,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:44,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4326166] [2023-11-17 11:35:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:44,883 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:44,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:44,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:44,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:44,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:44,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:35:44,893 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:35:44,893 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:44,893 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:35:44,911 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:35:44,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 129 transitions, 298 flow [2023-11-17 11:35:44,930 INFO L124 PetriNetUnfolderBase]: 60/280 cut-off events. [2023-11-17 11:35:44,930 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:35:44,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 280 events. 60/280 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1283 event pairs, 6 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 215. Up to 32 conditions per place. [2023-11-17 11:35:44,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 129 transitions, 298 flow [2023-11-17 11:35:44,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 129 transitions, 298 flow [2023-11-17 11:35:44,933 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:44,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 129 transitions, 298 flow [2023-11-17 11:35:44,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 129 transitions, 298 flow [2023-11-17 11:35:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 129 transitions, 298 flow [2023-11-17 11:35:44,951 INFO L124 PetriNetUnfolderBase]: 60/280 cut-off events. [2023-11-17 11:35:44,951 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:35:44,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 280 events. 60/280 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1283 event pairs, 6 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 215. Up to 32 conditions per place. [2023-11-17 11:35:44,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 12384 [2023-11-17 11:35:45,978 INFO L134 LiptonReduction]: Checked pairs total: 29022 [2023-11-17 11:35:45,978 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-11-17 11:35:45,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:45,980 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=LoopHeads, 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;@22c33a99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:45,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:45,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:45,981 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 11:35:45,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:45,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:45,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:45,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:45,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 25209245, now seen corresponding path program 1 times [2023-11-17 11:35:45,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:45,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019978248] [2023-11-17 11:35:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:45,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:45,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:45,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019978248] [2023-11-17 11:35:45,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019978248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:45,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:45,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544096884] [2023-11-17 11:35:45,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:45,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:45,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:45,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:45,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 222 [2023-11-17 11:35:45,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 84 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-11-17 11:35:45,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:45,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 222 [2023-11-17 11:35:45,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:09,017 INFO L124 PetriNetUnfolderBase]: 302884/397571 cut-off events. [2023-11-17 11:36:09,032 INFO L125 PetriNetUnfolderBase]: For 15746/15746 co-relation queries the response was YES. [2023-11-17 11:36:09,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800940 conditions, 397571 events. 302884/397571 cut-off events. For 15746/15746 co-relation queries the response was YES. Maximal size of possible extension queue 7029. Compared 2572727 event pairs, 223134 based on Foata normal form. 38508/410275 useless extension candidates. Maximal degree in co-relation 68281. Up to 395355 conditions per place. [2023-11-17 11:36:10,373 INFO L140 encePairwiseOnDemand]: 192/222 looper letters, 50 selfloop transitions, 2 changer transitions 10/67 dead transitions. [2023-11-17 11:36:10,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 298 flow [2023-11-17 11:36:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-17 11:36:10,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30180180180180183 [2023-11-17 11:36:10,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-17 11:36:10,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-17 11:36:10,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:10,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-17 11:36:10,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-17 11:36:10,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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) [2023-11-17 11:36:10,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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) [2023-11-17 11:36:10,378 INFO L175 Difference]: Start difference. First operand has 62 places, 84 transitions, 208 flow. Second operand 3 states and 201 transitions. [2023-11-17 11:36:10,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 298 flow [2023-11-17 11:36:10,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:36:10,387 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 134 flow [2023-11-17 11:36:10,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2023-11-17 11:36:10,388 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-11-17 11:36:10,388 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 134 flow [2023-11-17 11:36:10,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-11-17 11:36:10,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:10,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:10,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:36:10,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:10,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2006335101, now seen corresponding path program 1 times [2023-11-17 11:36:10,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:10,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154212532] [2023-11-17 11:36:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:10,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:10,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154212532] [2023-11-17 11:36:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154212532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:36:10,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931358062] [2023-11-17 11:36:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:36:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:36:10,441 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) [2023-11-17 11:36:10,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:36:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:10,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:36:10,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:36:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:10,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:36:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:10,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931358062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:36:10,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:36:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:36:10,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288160568] [2023-11-17 11:36:10,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:36:10,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:36:10,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:10,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:36:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:36:10,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 222 [2023-11-17 11:36:10,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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) [2023-11-17 11:36:10,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:10,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 222 [2023-11-17 11:36:10,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:19,939 INFO L124 PetriNetUnfolderBase]: 139696/182530 cut-off events. [2023-11-17 11:36:19,939 INFO L125 PetriNetUnfolderBase]: For 22841/22841 co-relation queries the response was YES. [2023-11-17 11:36:20,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382008 conditions, 182530 events. 139696/182530 cut-off events. For 22841/22841 co-relation queries the response was YES. Maximal size of possible extension queue 3786. Compared 1092478 event pairs, 27441 based on Foata normal form. 819/183178 useless extension candidates. Maximal degree in co-relation 43471. Up to 119557 conditions per place. [2023-11-17 11:36:20,789 INFO L140 encePairwiseOnDemand]: 218/222 looper letters, 123 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-11-17 11:36:20,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 134 transitions, 568 flow [2023-11-17 11:36:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:36:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:36:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 342 transitions. [2023-11-17 11:36:20,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25675675675675674 [2023-11-17 11:36:20,790 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 342 transitions. [2023-11-17 11:36:20,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 342 transitions. [2023-11-17 11:36:20,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:20,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 342 transitions. [2023-11-17 11:36:20,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 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) [2023-11-17 11:36:20,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 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) [2023-11-17 11:36:20,793 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 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) [2023-11-17 11:36:20,793 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 134 flow. Second operand 6 states and 342 transitions. [2023-11-17 11:36:20,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 134 transitions, 568 flow [2023-11-17 11:36:20,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 134 transitions, 560 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:36:20,798 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 166 flow [2023-11-17 11:36:20,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-11-17 11:36:20,799 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2023-11-17 11:36:20,799 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 166 flow [2023-11-17 11:36:20,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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) [2023-11-17 11:36:20,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:20,799 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:20,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 11:36:21,004 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 [2023-11-17 11:36:21,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:21,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 893578225, now seen corresponding path program 1 times [2023-11-17 11:36:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:21,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274330779] [2023-11-17 11:36:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:21,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:21,019 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:36:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:21,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:36:21,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:36:21,040 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:36:21,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:36:21,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:36:21,041 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:36:21,041 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:36:21,041 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:36:21,069 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:36:21,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 155 transitions, 365 flow [2023-11-17 11:36:21,098 INFO L124 PetriNetUnfolderBase]: 102/421 cut-off events. [2023-11-17 11:36:21,098 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:36:21,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 421 events. 102/421 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2066 event pairs, 23 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 330. Up to 80 conditions per place. [2023-11-17 11:36:21,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 155 transitions, 365 flow [2023-11-17 11:36:21,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 155 transitions, 365 flow [2023-11-17 11:36:21,103 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:21,103 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 155 transitions, 365 flow [2023-11-17 11:36:21,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 155 transitions, 365 flow [2023-11-17 11:36:21,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 155 transitions, 365 flow [2023-11-17 11:36:21,127 INFO L124 PetriNetUnfolderBase]: 102/421 cut-off events. [2023-11-17 11:36:21,127 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:36:21,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 421 events. 102/421 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2066 event pairs, 23 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 330. Up to 80 conditions per place. [2023-11-17 11:36:21,141 INFO L119 LiptonReduction]: Number of co-enabled transitions 18720 [2023-11-17 11:36:22,310 INFO L134 LiptonReduction]: Checked pairs total: 44536 [2023-11-17 11:36:22,310 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-11-17 11:36:22,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:36:22,313 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=LoopHeads, 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;@22c33a99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:36:22,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:36:22,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:36:22,315 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 11:36:22,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:22,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:22,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:36:22,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:22,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:22,315 INFO L85 PathProgramCache]: Analyzing trace with hash 32855230, now seen corresponding path program 1 times [2023-11-17 11:36:22,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:22,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954093141] [2023-11-17 11:36:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:22,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:22,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:22,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954093141] [2023-11-17 11:36:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954093141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:22,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:22,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:36:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088800581] [2023-11-17 11:36:22,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:22,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:22,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 261 [2023-11-17 11:36:22,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 101 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-17 11:36:22,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:22,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 261 [2023-11-17 11:36:22,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand