/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:37:39,712 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:37:39,775 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 15:37:39,798 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:37:39,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:37:39,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:37:39,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:37:39,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:37:39,800 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:37:39,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:37:39,804 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:37:39,804 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:37:39,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:37:39,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:37:39,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:37:39,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:37:39,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:37:39,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:37:39,805 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:37:39,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:37:39,806 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:37:39,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:37:39,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:37:39,807 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:37:39,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:37:39,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:39,807 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:37:39,807 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:37:39,807 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:37:39,807 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:37:39,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:37:39,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:37:39,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:37:39,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:37:40,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:37:40,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:37:40,009 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:37:40,011 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:37:40,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-17 15:37:41,101 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:37:41,255 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:37:41,264 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-17 15:37:41,274 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fd470534/d666a1d236ae4dcfb0932a1d043cbf23/FLAG18756c629 [2023-11-17 15:37:41,285 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fd470534/d666a1d236ae4dcfb0932a1d043cbf23 [2023-11-17 15:37:41,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:37:41,287 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:37:41,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:41,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:37:41,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:37:41,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165c3b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41, skipping insertion in model container [2023-11-17 15:37:41,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,345 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:37:41,688 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_37-indirect_racing.i[30176,30189] [2023-11-17 15:37:41,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:41,727 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:37:41,765 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_37-indirect_racing.i[30176,30189] [2023-11-17 15:37:41,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:41,802 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:37:41,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41 WrapperNode [2023-11-17 15:37:41,803 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:41,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:41,804 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:37:41,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:37:41,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,849 INFO L138 Inliner]: procedures = 171, calls = 40, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-17 15:37:41,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:41,850 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:37:41,850 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:37:41,850 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:37:41,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,874 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:37:41,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:37:41,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:37:41,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:37:41,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (1/1) ... [2023-11-17 15:37:41,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:41,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:41,935 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 15:37:41,937 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 15:37:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:37:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:37:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:37:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:37:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:37:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:37:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:37:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:37:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:37:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:37:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:37:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:37:41,964 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 15:37:42,055 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:37:42,057 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:37:42,184 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:37:42,205 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:37:42,205 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:37:42,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:42 BoogieIcfgContainer [2023-11-17 15:37:42,206 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:37:42,208 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:37:42,208 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:37:42,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:37:42,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:37:41" (1/3) ... [2023-11-17 15:37:42,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8426be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:42, skipping insertion in model container [2023-11-17 15:37:42,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:41" (2/3) ... [2023-11-17 15:37:42,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8426be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:42, skipping insertion in model container [2023-11-17 15:37:42,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:42" (3/3) ... [2023-11-17 15:37:42,211 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-11-17 15:37:42,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:37:42,222 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:37:42,223 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:37:42,256 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:37:42,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 116 transitions, 239 flow [2023-11-17 15:37:42,346 INFO L124 PetriNetUnfolderBase]: 17/154 cut-off events. [2023-11-17 15:37:42,347 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:42,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 17/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 401 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-17 15:37:42,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 116 transitions, 239 flow [2023-11-17 15:37:42,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 111 transitions, 226 flow [2023-11-17 15:37:42,369 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:42,380 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 111 transitions, 226 flow [2023-11-17 15:37:42,382 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 111 transitions, 226 flow [2023-11-17 15:37:42,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 111 transitions, 226 flow [2023-11-17 15:37:42,406 INFO L124 PetriNetUnfolderBase]: 16/149 cut-off events. [2023-11-17 15:37:42,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:42,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 149 events. 16/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 378 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-17 15:37:42,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-11-17 15:37:44,826 INFO L134 LiptonReduction]: Checked pairs total: 4877 [2023-11-17 15:37:44,826 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-11-17 15:37:44,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:44,840 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@13977cd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:44,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:44,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:44,842 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 15:37:44,842 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:44,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:44,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:44,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:44,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 14938284, now seen corresponding path program 1 times [2023-11-17 15:37:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:44,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57250238] [2023-11-17 15:37:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:44,978 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 15:37:44,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:44,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57250238] [2023-11-17 15:37:44,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57250238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:44,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:44,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:44,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195336014] [2023-11-17 15:37:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:44,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:44,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:45,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 221 [2023-11-17 15:37:45,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 15:37:45,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:45,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 221 [2023-11-17 15:37:45,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:45,075 INFO L124 PetriNetUnfolderBase]: 90/214 cut-off events. [2023-11-17 15:37:45,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:45,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 214 events. 90/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 897 event pairs, 0 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 399. Up to 190 conditions per place. [2023-11-17 15:37:45,077 INFO L140 encePairwiseOnDemand]: 210/221 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-11-17 15:37:45,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 136 flow [2023-11-17 15:37:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-11-17 15:37:45,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555052790346908 [2023-11-17 15:37:45,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-11-17 15:37:45,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-11-17 15:37:45,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:45,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-11-17 15:37:45,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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 15:37:45,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:45,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:45,112 INFO L175 Difference]: Start difference. First operand has 26 places, 31 transitions, 66 flow. Second operand 3 states and 302 transitions. [2023-11-17 15:37:45,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 136 flow [2023-11-17 15:37:45,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:45,116 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 50 flow [2023-11-17 15:37:45,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-11-17 15:37:45,121 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-11-17 15:37:45,122 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 50 flow [2023-11-17 15:37:45,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 15:37:45,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:45,122 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:37:45,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:37:45,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:45,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1490463692, now seen corresponding path program 1 times [2023-11-17 15:37:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:45,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240349880] [2023-11-17 15:37:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:45,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:45,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:45,207 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:45,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:45,209 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:45,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:45,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:37:45,211 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:37:45,217 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:45,217 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:37:45,241 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:37:45,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 153 transitions, 322 flow [2023-11-17 15:37:45,277 INFO L124 PetriNetUnfolderBase]: 31/255 cut-off events. [2023-11-17 15:37:45,277 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:45,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 812 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-11-17 15:37:45,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 153 transitions, 322 flow [2023-11-17 15:37:45,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 153 transitions, 322 flow [2023-11-17 15:37:45,282 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:45,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 153 transitions, 322 flow [2023-11-17 15:37:45,283 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 153 transitions, 322 flow [2023-11-17 15:37:45,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 153 transitions, 322 flow [2023-11-17 15:37:45,300 INFO L124 PetriNetUnfolderBase]: 31/255 cut-off events. [2023-11-17 15:37:45,300 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:45,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 812 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-11-17 15:37:45,306 INFO L119 LiptonReduction]: Number of co-enabled transitions 9380 [2023-11-17 15:37:47,918 INFO L134 LiptonReduction]: Checked pairs total: 16235 [2023-11-17 15:37:47,919 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-11-17 15:37:47,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:47,929 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;@13977cd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:47,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:47,931 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:47,932 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 15:37:47,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:47,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:47,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:47,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:47,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 24865457, now seen corresponding path program 1 times [2023-11-17 15:37:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512055157] [2023-11-17 15:37:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:48,005 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 15:37:48,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512055157] [2023-11-17 15:37:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512055157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:48,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:48,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:48,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338600417] [2023-11-17 15:37:48,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:48,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:48,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 286 [2023-11-17 15:37:48,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 15:37:48,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:48,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 286 [2023-11-17 15:37:48,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:48,271 INFO L124 PetriNetUnfolderBase]: 2248/3858 cut-off events. [2023-11-17 15:37:48,272 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-17 15:37:48,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7556 conditions, 3858 events. 2248/3858 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 21932 event pairs, 1026 based on Foata normal form. 247/3709 useless extension candidates. Maximal degree in co-relation 644. Up to 3624 conditions per place. [2023-11-17 15:37:48,282 INFO L140 encePairwiseOnDemand]: 268/286 looper letters, 37 selfloop transitions, 2 changer transitions 9/53 dead transitions. [2023-11-17 15:37:48,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 216 flow [2023-11-17 15:37:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-11-17 15:37:48,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458041958041958 [2023-11-17 15:37:48,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-11-17 15:37:48,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-11-17 15:37:48,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:48,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-11-17 15:37:48,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 15:37:48,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 15:37:48,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 15:37:48,289 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 128 flow. Second operand 3 states and 393 transitions. [2023-11-17 15:37:48,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 216 flow [2023-11-17 15:37:48,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:48,291 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-17 15:37:48,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-17 15:37:48,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:37:48,292 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-17 15:37:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 15:37:48,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:48,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:48,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:37:48,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:48,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2014810150, now seen corresponding path program 1 times [2023-11-17 15:37:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196701233] [2023-11-17 15:37:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:48,358 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 15:37:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:48,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196701233] [2023-11-17 15:37:48,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196701233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:48,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038708938] [2023-11-17 15:37:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:48,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:48,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:48,370 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 15:37:48,402 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 15:37:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:48,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:48,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:48,469 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 15:37:48,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:48,517 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 15:37:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038708938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:48,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:48,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146368572] [2023-11-17 15:37:48,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:48,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:48,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 286 [2023-11-17 15:37:48,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 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 15:37:48,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:48,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 286 [2023-11-17 15:37:48,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:48,637 INFO L124 PetriNetUnfolderBase]: 518/1028 cut-off events. [2023-11-17 15:37:48,637 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-17 15:37:48,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2085 conditions, 1028 events. 518/1028 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5334 event pairs, 0 based on Foata normal form. 121/1149 useless extension candidates. Maximal degree in co-relation 189. Up to 618 conditions per place. [2023-11-17 15:37:48,641 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 53 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-17 15:37:48,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 252 flow [2023-11-17 15:37:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:37:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:37:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 598 transitions. [2023-11-17 15:37:48,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2023-11-17 15:37:48,643 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 598 transitions. [2023-11-17 15:37:48,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 598 transitions. [2023-11-17 15:37:48,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:48,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 598 transitions. [2023-11-17 15:37:48,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 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 15:37:48,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 15:37:48,647 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 15:37:48,647 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 598 transitions. [2023-11-17 15:37:48,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 252 flow [2023-11-17 15:37:48,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:37:48,650 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:37:48,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 15:37:48,652 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-17 15:37:48,652 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:37:48,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 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 15:37:48,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:48,653 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:37:48,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 15:37:48,858 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 15:37:48,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:48,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:48,859 INFO L85 PathProgramCache]: Analyzing trace with hash -643889592, now seen corresponding path program 1 times [2023-11-17 15:37:48,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:48,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823144530] [2023-11-17 15:37:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:48,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:48,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:48,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:48,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:48,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:48,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:48,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:37:48,902 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:48,902 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:48,902 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:37:48,923 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:37:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 190 transitions, 407 flow [2023-11-17 15:37:48,950 INFO L124 PetriNetUnfolderBase]: 50/391 cut-off events. [2023-11-17 15:37:48,950 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:48,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1394 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-11-17 15:37:48,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 190 transitions, 407 flow [2023-11-17 15:37:48,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 190 transitions, 407 flow [2023-11-17 15:37:48,955 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:48,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 190 transitions, 407 flow [2023-11-17 15:37:48,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 190 transitions, 407 flow [2023-11-17 15:37:48,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 190 transitions, 407 flow [2023-11-17 15:37:48,988 INFO L124 PetriNetUnfolderBase]: 50/391 cut-off events. [2023-11-17 15:37:48,988 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:48,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1394 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-11-17 15:37:48,999 INFO L119 LiptonReduction]: Number of co-enabled transitions 18060 [2023-11-17 15:37:51,877 INFO L134 LiptonReduction]: Checked pairs total: 34280 [2023-11-17 15:37:51,877 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-11-17 15:37:51,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:51,881 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;@13977cd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:51,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:51,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:51,883 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:37:51,883 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:51,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:51,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:51,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:51,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash 36854153, now seen corresponding path program 1 times [2023-11-17 15:37:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39359382] [2023-11-17 15:37:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:51,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:51,912 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 15:37:51,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:51,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39359382] [2023-11-17 15:37:51,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39359382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:51,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002474758] [2023-11-17 15:37:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 353 [2023-11-17 15:37:51,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 75 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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 15:37:51,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:51,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 353 [2023-11-17 15:37:51,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:55,064 INFO L124 PetriNetUnfolderBase]: 35761/52865 cut-off events. [2023-11-17 15:37:55,064 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2023-11-17 15:37:55,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103975 conditions, 52865 events. 35761/52865 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 355880 event pairs, 22925 based on Foata normal form. 3953/52551 useless extension candidates. Maximal degree in co-relation 8120. Up to 50190 conditions per place. [2023-11-17 15:37:55,223 INFO L140 encePairwiseOnDemand]: 329/353 looper letters, 47 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2023-11-17 15:37:55,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 275 flow [2023-11-17 15:37:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-11-17 15:37:55,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523135033050047 [2023-11-17 15:37:55,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-11-17 15:37:55,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-11-17 15:37:55,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:55,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-11-17 15:37:55,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 15:37:55,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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 15:37:55,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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 15:37:55,229 INFO L175 Difference]: Start difference. First operand has 58 places, 75 transitions, 177 flow. Second operand 3 states and 479 transitions. [2023-11-17 15:37:55,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 275 flow [2023-11-17 15:37:55,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:55,231 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-17 15:37:55,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-17 15:37:55,234 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:37:55,234 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-17 15:37:55,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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 15:37:55,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:55,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:55,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:37:55,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:55,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1005042427, now seen corresponding path program 1 times [2023-11-17 15:37:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:55,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835258235] [2023-11-17 15:37:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:55,276 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 15:37:55,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835258235] [2023-11-17 15:37:55,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835258235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:55,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867398353] [2023-11-17 15:37:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:55,278 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 15:37:55,280 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 15:37:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:55,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:55,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:55,347 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 15:37:55,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:55,360 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 15:37:55,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867398353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:55,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:55,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965325299] [2023-11-17 15:37:55,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:55,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 353 [2023-11-17 15:37:55,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 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 15:37:55,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:55,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 353 [2023-11-17 15:37:55,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:56,291 INFO L124 PetriNetUnfolderBase]: 8446/13708 cut-off events. [2023-11-17 15:37:56,292 INFO L125 PetriNetUnfolderBase]: For 4862/4862 co-relation queries the response was YES. [2023-11-17 15:37:56,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27578 conditions, 13708 events. 8446/13708 cut-off events. For 4862/4862 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 92486 event pairs, 0 based on Foata normal form. 1221/14929 useless extension candidates. Maximal degree in co-relation 2561. Up to 8074 conditions per place. [2023-11-17 15:37:56,348 INFO L140 encePairwiseOnDemand]: 350/353 looper letters, 93 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-11-17 15:37:56,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 104 transitions, 430 flow [2023-11-17 15:37:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:37:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:37:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 886 transitions. [2023-11-17 15:37:56,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183191690273843 [2023-11-17 15:37:56,351 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 886 transitions. [2023-11-17 15:37:56,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 886 transitions. [2023-11-17 15:37:56,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:56,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 886 transitions. [2023-11-17 15:37:56,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.66666666666666) internal successors, (886), 6 states have internal predecessors, (886), 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 15:37:56,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 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 15:37:56,355 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 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 15:37:56,355 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 886 transitions. [2023-11-17 15:37:56,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 104 transitions, 430 flow [2023-11-17 15:37:56,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 104 transitions, 426 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:37:56,359 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:37:56,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-17 15:37:56,359 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:37:56,359 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:37:56,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 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 15:37:56,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:56,360 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:37:56,364 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 15:37:56,564 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 15:37:56,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:56,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1016627880, now seen corresponding path program 1 times [2023-11-17 15:37:56,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:56,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612579180] [2023-11-17 15:37:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:56,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:56,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:56,584 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:56,584 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:56,584 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:56,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:56,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:37:56,585 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:56,585 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:56,585 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:37:56,607 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:37:56,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 227 transitions, 494 flow [2023-11-17 15:37:56,698 INFO L124 PetriNetUnfolderBase]: 81/599 cut-off events. [2023-11-17 15:37:56,698 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:56,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 599 events. 81/599 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2390 event pairs, 6 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2023-11-17 15:37:56,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 227 transitions, 494 flow [2023-11-17 15:37:56,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 227 transitions, 494 flow [2023-11-17 15:37:56,705 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:56,705 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 227 transitions, 494 flow [2023-11-17 15:37:56,705 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 227 transitions, 494 flow [2023-11-17 15:37:56,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 227 transitions, 494 flow [2023-11-17 15:37:56,744 INFO L124 PetriNetUnfolderBase]: 81/599 cut-off events. [2023-11-17 15:37:56,744 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:56,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 599 events. 81/599 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2390 event pairs, 6 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2023-11-17 15:37:56,760 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-11-17 15:38:00,143 INFO L134 LiptonReduction]: Checked pairs total: 64855 [2023-11-17 15:38:00,143 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-17 15:38:00,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:00,145 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;@13977cd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:00,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:38:00,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:00,146 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 15:38:00,146 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:00,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:00,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:38:00,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:00,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 51015259, now seen corresponding path program 1 times [2023-11-17 15:38:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:00,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747975230] [2023-11-17 15:38:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:00,162 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 15:38:00,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:00,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747975230] [2023-11-17 15:38:00,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747975230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:00,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:00,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:00,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867798943] [2023-11-17 15:38:00,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:00,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:00,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:00,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-11-17 15:38:00,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 92 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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 15:38:00,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:00,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-11-17 15:38:00,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand