/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/pthread-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:39:41,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:39:41,729 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 16:39:41,750 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:39:41,751 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:39:41,751 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:39:41,752 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:39:41,752 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:39:41,752 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:39:41,753 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:39:41,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:39:41,753 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:39:41,754 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:39:41,754 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:39:41,754 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:39:41,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:39:41,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:39:41,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:39:41,756 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:39:41,756 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:39:41,756 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:39:41,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:39:41,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:39:41,766 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:39:41,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:39:41,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:39:41,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:39:41,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:39:41,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:39:41,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:39:41,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:39:41,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:39:41,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:39:42,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:39:42,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:39:42,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:39:42,038 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:39:42,039 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:39:42,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-11-17 16:39:43,231 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:39:43,457 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:39:43,458 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-11-17 16:39:43,480 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d1eb6007/63b4f2b62bcc4a8bb8b9487de1249b38/FLAGde3eb24b3 [2023-11-17 16:39:43,496 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d1eb6007/63b4f2b62bcc4a8bb8b9487de1249b38 [2023-11-17 16:39:43,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:39:43,499 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:39:43,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:39:43,501 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:39:43,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:39:43,509 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,510 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c4fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43, skipping insertion in model container [2023-11-17 16:39:43,510 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,551 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:39:43,814 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2023-11-17 16:39:43,829 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] [2023-11-17 16:39:43,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:39:43,851 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:39:43,878 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2023-11-17 16:39:43,880 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] [2023-11-17 16:39:43,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:39:43,926 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:39:43,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43 WrapperNode [2023-11-17 16:39:43,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:39:43,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:39:43,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:39:43,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:39:43,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,968 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 140 [2023-11-17 16:39:43,968 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:39:43,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:39:43,969 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:39:43,969 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:39:43,980 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,995 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,996 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:43,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:39:44,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:39:44,000 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:39:44,000 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:39:44,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (1/1) ... [2023-11-17 16:39:44,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:39:44,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:44,029 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 16:39:44,039 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 16:39:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:39:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-17 16:39:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-17 16:39:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-17 16:39:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-17 16:39:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:39:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 16:39:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:39:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:39:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:39:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-17 16:39:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:39:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 16:39:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:39:44,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:39:44,067 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 16:39:44,184 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:39:44,186 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:39:44,466 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:39:44,489 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:39:44,489 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 16:39:44,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:39:44 BoogieIcfgContainer [2023-11-17 16:39:44,491 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:39:44,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:39:44,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:39:44,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:39:44,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:39:43" (1/3) ... [2023-11-17 16:39:44,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7007f6c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:39:44, skipping insertion in model container [2023-11-17 16:39:44,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:39:43" (2/3) ... [2023-11-17 16:39:44,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7007f6c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:39:44, skipping insertion in model container [2023-11-17 16:39:44,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:39:44" (3/3) ... [2023-11-17 16:39:44,498 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-11-17 16:39:44,534 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:39:44,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 16:39:44,534 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:39:44,615 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:39:44,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 308 flow [2023-11-17 16:39:44,707 INFO L124 PetriNetUnfolderBase]: 10/145 cut-off events. [2023-11-17 16:39:44,707 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:39:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 145 events. 10/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 268 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-11-17 16:39:44,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 147 transitions, 308 flow [2023-11-17 16:39:44,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 135 transitions, 279 flow [2023-11-17 16:39:44,723 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:39:44,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 135 transitions, 279 flow [2023-11-17 16:39:44,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 135 transitions, 279 flow [2023-11-17 16:39:44,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 135 transitions, 279 flow [2023-11-17 16:39:44,766 INFO L124 PetriNetUnfolderBase]: 10/135 cut-off events. [2023-11-17 16:39:44,767 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 16:39:44,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 135 events. 10/135 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-11-17 16:39:44,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 4302 [2023-11-17 16:40:03,552 INFO L134 LiptonReduction]: Checked pairs total: 7314 [2023-11-17 16:40:03,553 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-11-17 16:40:03,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:40:03,584 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;@6639cf9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:40:03,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 16:40:03,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:40:03,587 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-17 16:40:03,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 16:40:03,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:03,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 16:40:03,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 16:40:03,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash 18250850, now seen corresponding path program 1 times [2023-11-17 16:40:03,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:03,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435174506] [2023-11-17 16:40:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:03,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:03,777 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 16:40:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:03,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435174506] [2023-11-17 16:40:03,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435174506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:40:03,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:40:03,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:40:03,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717394800] [2023-11-17 16:40:03,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:40:03,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 16:40:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 16:40:03,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 16:40:03,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 276 [2023-11-17 16:40:03,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 71 flow. Second operand has 2 states, 2 states have (on average 135.0) internal successors, (270), 2 states have internal predecessors, (270), 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 16:40:03,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:03,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 276 [2023-11-17 16:40:03,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:03,924 INFO L124 PetriNetUnfolderBase]: 342/541 cut-off events. [2023-11-17 16:40:03,924 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 16:40:03,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 541 events. 342/541 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1945 event pairs, 240 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 997. Up to 520 conditions per place. [2023-11-17 16:40:03,930 INFO L140 encePairwiseOnDemand]: 274/276 looper letters, 27 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-11-17 16:40:03,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 121 flow [2023-11-17 16:40:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 16:40:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 16:40:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 295 transitions. [2023-11-17 16:40:03,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344202898550725 [2023-11-17 16:40:03,942 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 295 transitions. [2023-11-17 16:40:03,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 295 transitions. [2023-11-17 16:40:03,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:03,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 295 transitions. [2023-11-17 16:40:03,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,954 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,955 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 71 flow. Second operand 2 states and 295 transitions. [2023-11-17 16:40:03,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 121 flow [2023-11-17 16:40:03,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:40:03,961 INFO L231 Difference]: Finished difference. Result has 28 places, 29 transitions, 62 flow [2023-11-17 16:40:03,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=29} [2023-11-17 16:40:03,966 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-17 16:40:03,966 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 29 transitions, 62 flow [2023-11-17 16:40:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 135.0) internal successors, (270), 2 states have internal predecessors, (270), 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 16:40:03,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:03,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:03,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:40:03,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 16:40:03,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2034265200, now seen corresponding path program 1 times [2023-11-17 16:40:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845134019] [2023-11-17 16:40:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:04,147 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 16:40:04,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845134019] [2023-11-17 16:40:04,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845134019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:40:04,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:40:04,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:40:04,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908881672] [2023-11-17 16:40:04,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:40:04,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:40:04,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:40:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:40:04,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 276 [2023-11-17 16:40:04,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 16:40:04,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:04,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 276 [2023-11-17 16:40:04,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:04,306 INFO L124 PetriNetUnfolderBase]: 510/825 cut-off events. [2023-11-17 16:40:04,306 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 16:40:04,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1686 conditions, 825 events. 510/825 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2981 event pairs, 188 based on Foata normal form. 20/631 useless extension candidates. Maximal degree in co-relation 1683. Up to 483 conditions per place. [2023-11-17 16:40:04,312 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 43 selfloop transitions, 3 changer transitions 2/49 dead transitions. [2023-11-17 16:40:04,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 49 transitions, 201 flow [2023-11-17 16:40:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:40:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:40:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-17 16:40:04,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205314009661836 [2023-11-17 16:40:04,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-17 16:40:04,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-17 16:40:04,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:04,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-17 16:40:04,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 16:40:04,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 16:40:04,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 16:40:04,326 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 62 flow. Second operand 3 states and 431 transitions. [2023-11-17 16:40:04,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 49 transitions, 201 flow [2023-11-17 16:40:04,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 201 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:40:04,329 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 77 flow [2023-11-17 16:40:04,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-17 16:40:04,329 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-17 16:40:04,330 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 77 flow [2023-11-17 16:40:04,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 16:40:04,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:04,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:04,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:40:04,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 16:40:04,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash 933372169, now seen corresponding path program 1 times [2023-11-17 16:40:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:04,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670973667] [2023-11-17 16:40:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:04,510 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 16:40:04,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670973667] [2023-11-17 16:40:04,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670973667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:40:04,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:40:04,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:40:04,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926107222] [2023-11-17 16:40:04,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:40:04,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:40:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:40:04,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:40:04,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 276 [2023-11-17 16:40:04,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 16:40:04,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:04,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 276 [2023-11-17 16:40:04,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:04,620 INFO L124 PetriNetUnfolderBase]: 237/416 cut-off events. [2023-11-17 16:40:04,620 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 16:40:04,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 416 events. 237/416 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1497 event pairs, 41 based on Foata normal form. 18/372 useless extension candidates. Maximal degree in co-relation 888. Up to 280 conditions per place. [2023-11-17 16:40:04,623 INFO L140 encePairwiseOnDemand]: 270/276 looper letters, 29 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-11-17 16:40:04,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 168 flow [2023-11-17 16:40:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:40:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:40:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-11-17 16:40:04,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2023-11-17 16:40:04,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-11-17 16:40:04,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-11-17 16:40:04,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:04,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-11-17 16:40:04,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 16:40:04,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 16:40:04,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 16:40:04,628 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 77 flow. Second operand 3 states and 408 transitions. [2023-11-17 16:40:04,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 168 flow [2023-11-17 16:40:04,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:40:04,632 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 86 flow [2023-11-17 16:40:04,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-17 16:40:04,634 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-17 16:40:04,634 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 86 flow [2023-11-17 16:40:04,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 16:40:04,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:04,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:04,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:40:04,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 16:40:04,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1261893516, now seen corresponding path program 1 times [2023-11-17 16:40:04,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:04,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288802053] [2023-11-17 16:40:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:04,854 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 16:40:04,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:04,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288802053] [2023-11-17 16:40:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288802053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:40:04,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:40:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:40:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869240594] [2023-11-17 16:40:04,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:40:04,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:40:04,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:40:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:40:04,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 276 [2023-11-17 16:40:04,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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 16:40:04,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:04,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 276 [2023-11-17 16:40:04,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:04,978 INFO L124 PetriNetUnfolderBase]: 259/468 cut-off events. [2023-11-17 16:40:04,978 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-17 16:40:04,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 468 events. 259/468 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1553 event pairs, 108 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 1110. Up to 305 conditions per place. [2023-11-17 16:40:04,982 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 36 selfloop transitions, 2 changer transitions 4/45 dead transitions. [2023-11-17 16:40:04,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 217 flow [2023-11-17 16:40:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:40:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:40:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-11-17 16:40:04,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867149758454106 [2023-11-17 16:40:04,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-11-17 16:40:04,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-11-17 16:40:04,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:04,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-11-17 16:40:04,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:04,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 16:40:04,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 16:40:04,988 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 86 flow. Second operand 3 states and 403 transitions. [2023-11-17 16:40:04,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 217 flow [2023-11-17 16:40:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:40:04,990 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 92 flow [2023-11-17 16:40:04,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-17 16:40:04,992 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-17 16:40:04,992 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 92 flow [2023-11-17 16:40:04,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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 16:40:04,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:04,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:04,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:40:04,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 16:40:04,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:04,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1882561751, now seen corresponding path program 1 times [2023-11-17 16:40:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:04,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951575488] [2023-11-17 16:40:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:05,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 16:40:05,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766742854] [2023-11-17 16:40:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:05,023 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 16:40:05,035 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 16:40:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:05,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:40:05,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:05,374 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 16:40:05,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:40:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951575488] [2023-11-17 16:40:05,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 16:40:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766742854] [2023-11-17 16:40:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766742854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:40:05,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:40:05,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:40:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956654142] [2023-11-17 16:40:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:40:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:40:05,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:40:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:40:05,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 276 [2023-11-17 16:40:05,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 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 16:40:05,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:05,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 276 [2023-11-17 16:40:05,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:05,513 INFO L124 PetriNetUnfolderBase]: 332/601 cut-off events. [2023-11-17 16:40:05,513 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-17 16:40:05,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 601 events. 332/601 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2089 event pairs, 83 based on Foata normal form. 6/545 useless extension candidates. Maximal degree in co-relation 1359. Up to 296 conditions per place. [2023-11-17 16:40:05,517 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 52 selfloop transitions, 4 changer transitions 4/63 dead transitions. [2023-11-17 16:40:05,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 63 transitions, 300 flow [2023-11-17 16:40:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:40:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:40:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 526 transitions. [2023-11-17 16:40:05,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47644927536231885 [2023-11-17 16:40:05,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 526 transitions. [2023-11-17 16:40:05,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 526 transitions. [2023-11-17 16:40:05,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:05,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 526 transitions. [2023-11-17 16:40:05,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 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 16:40:05,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 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 16:40:05,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 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 16:40:05,523 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 92 flow. Second operand 4 states and 526 transitions. [2023-11-17 16:40:05,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 63 transitions, 300 flow [2023-11-17 16:40:05,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 63 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:40:05,525 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 117 flow [2023-11-17 16:40:05,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-17 16:40:05,526 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-17 16:40:05,526 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 117 flow [2023-11-17 16:40:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 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 16:40:05,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:05,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:05,534 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 16:40:05,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:05,734 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 16:40:05,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1770122884, now seen corresponding path program 1 times [2023-11-17 16:40:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:05,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068410034] [2023-11-17 16:40:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:05,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:05,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 16:40:05,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073758098] [2023-11-17 16:40:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:05,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:05,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:05,834 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 16:40:05,860 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 16:40:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:05,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:40:05,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:40:06,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-17 16:40:06,050 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-17 16:40:06,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-17 16:40:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-17 16:40:06,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2023-11-17 16:40:06,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 75 [2023-11-17 16:40:06,686 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 16:40:06,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:40:06,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:06,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068410034] [2023-11-17 16:40:06,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 16:40:06,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073758098] [2023-11-17 16:40:06,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073758098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:40:06,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:40:06,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:40:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364832246] [2023-11-17 16:40:06,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:40:06,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:40:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:40:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:40:06,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 276 [2023-11-17 16:40:06,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 117 flow. Second operand has 8 states, 8 states have (on average 92.875) internal successors, (743), 8 states have internal predecessors, (743), 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 16:40:06,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:06,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 276 [2023-11-17 16:40:06,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:07,489 INFO L124 PetriNetUnfolderBase]: 772/1393 cut-off events. [2023-11-17 16:40:07,489 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2023-11-17 16:40:07,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3252 conditions, 1393 events. 772/1393 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6431 event pairs, 224 based on Foata normal form. 26/1271 useless extension candidates. Maximal degree in co-relation 3244. Up to 471 conditions per place. [2023-11-17 16:40:07,497 INFO L140 encePairwiseOnDemand]: 266/276 looper letters, 87 selfloop transitions, 16 changer transitions 3/109 dead transitions. [2023-11-17 16:40:07,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 109 transitions, 564 flow [2023-11-17 16:40:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:40:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:40:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 834 transitions. [2023-11-17 16:40:07,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37771739130434784 [2023-11-17 16:40:07,500 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 834 transitions. [2023-11-17 16:40:07,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 834 transitions. [2023-11-17 16:40:07,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:07,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 834 transitions. [2023-11-17 16:40:07,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.25) internal successors, (834), 8 states have internal predecessors, (834), 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 16:40:07,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 276.0) internal successors, (2484), 9 states have internal predecessors, (2484), 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 16:40:07,506 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 276.0) internal successors, (2484), 9 states have internal predecessors, (2484), 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 16:40:07,506 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 117 flow. Second operand 8 states and 834 transitions. [2023-11-17 16:40:07,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 109 transitions, 564 flow [2023-11-17 16:40:07,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 109 transitions, 551 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 16:40:07,510 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 237 flow [2023-11-17 16:40:07,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-11-17 16:40:07,510 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2023-11-17 16:40:07,510 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 237 flow [2023-11-17 16:40:07,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 92.875) internal successors, (743), 8 states have internal predecessors, (743), 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 16:40:07,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:07,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:07,520 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 16:40:07,717 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,SelfDestructingSolverStorable5 [2023-11-17 16:40:07,718 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 16:40:07,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2092596102, now seen corresponding path program 1 times [2023-11-17 16:40:07,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:07,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915645904] [2023-11-17 16:40:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:07,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:07,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 16:40:07,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187301118] [2023-11-17 16:40:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:07,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:07,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:07,738 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 16:40:07,761 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 16:40:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 16:40:07,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 16:40:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 16:40:08,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 16:40:08,021 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 16:40:08,022 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-17 16:40:08,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-17 16:40:08,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-17 16:40:08,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 16:40:08,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 16:40:08,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 16:40:08,061 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 16:40:08,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:08,257 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:08,263 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:40:08,263 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:40:08,298 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-17 16:40:08,299 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated [2023-11-17 16:40:08,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:40:08 BasicIcfg [2023-11-17 16:40:08,315 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:40:08,315 INFO L158 Benchmark]: Toolchain (without parser) took 24816.29ms. Allocated memory was 226.5MB in the beginning and 345.0MB in the end (delta: 118.5MB). Free memory was 180.4MB in the beginning and 305.7MB in the end (delta: -125.4MB). Peak memory consumption was 186.3MB. Max. memory is 8.0GB. [2023-11-17 16:40:08,315 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 226.5MB. Free memory is still 174.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:40:08,316 INFO L158 Benchmark]: CACSL2BoogieTranslator took 425.87ms. Allocated memory is still 226.5MB. Free memory was 180.4MB in the beginning and 159.7MB in the end (delta: 20.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 16:40:08,316 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.42ms. Allocated memory is still 226.5MB. Free memory was 159.7MB in the beginning and 157.3MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 16:40:08,316 INFO L158 Benchmark]: Boogie Preprocessor took 29.98ms. Allocated memory is still 226.5MB. Free memory was 157.3MB in the beginning and 155.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:40:08,316 INFO L158 Benchmark]: RCFGBuilder took 491.39ms. Allocated memory is still 226.5MB. Free memory was 155.6MB in the beginning and 137.0MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-11-17 16:40:08,317 INFO L158 Benchmark]: TraceAbstraction took 23822.02ms. Allocated memory was 226.5MB in the beginning and 345.0MB in the end (delta: 118.5MB). Free memory was 136.3MB in the beginning and 305.7MB in the end (delta: -169.4MB). Peak memory consumption was 142.3MB. Max. memory is 8.0GB. [2023-11-17 16:40:08,318 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 226.5MB. Free memory is still 174.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 425.87ms. Allocated memory is still 226.5MB. Free memory was 180.4MB in the beginning and 159.7MB in the end (delta: 20.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.42ms. Allocated memory is still 226.5MB. Free memory was 159.7MB in the beginning and 157.3MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.98ms. Allocated memory is still 226.5MB. Free memory was 157.3MB in the beginning and 155.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 491.39ms. Allocated memory is still 226.5MB. Free memory was 155.6MB in the beginning and 137.0MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 23822.02ms. Allocated memory was 226.5MB in the beginning and 345.0MB in the end (delta: 118.5MB). Free memory was 136.3MB in the beginning and 305.7MB in the end (delta: -169.4MB). Peak memory consumption was 142.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 18.8s, 132 PlacesBefore, 31 PlacesAfterwards, 135 TransitionsBefore, 31 TransitionsAfterwards, 4302 CoEnabledTransitionPairs, 7 FixpointIterations, 42 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 3 ChoiceCompositions, 129 TotalNumberOfCompositions, 7314 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4988, independent: 4792, independent conditional: 0, independent unconditional: 4792, dependent: 178, dependent conditional: 0, dependent unconditional: 178, unknown: 18, unknown conditional: 0, unknown unconditional: 18] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3185, independent: 3129, independent conditional: 0, independent unconditional: 3129, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3185, independent: 3090, independent conditional: 0, independent unconditional: 3090, dependent: 95, dependent conditional: 0, dependent unconditional: 95, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 95, independent: 39, independent conditional: 0, independent unconditional: 39, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13451, independent: 106, independent conditional: 0, independent unconditional: 106, dependent: 471, dependent conditional: 0, dependent unconditional: 471, unknown: 12873, unknown conditional: 0, unknown unconditional: 12873] ], Cache Queries: [ total: 4988, independent: 1663, independent conditional: 0, independent unconditional: 1663, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 3197, unknown conditional: 0, unknown unconditional: 3197] , Statistics on independence cache: Total cache size (in pairs): 226, Positive cache size: 208, Positive conditional cache size: 0, Positive unconditional cache size: 208, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 2, Unknown conditional cache size: 0, Unknown unconditional cache size: 2 - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 211 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.6s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 18.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 157 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 157 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 504 IncrementalHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 1 mSDtfsCounter, 504 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=237occurred in iteration=6, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 62 ConstructedInterpolants, 9 QuantifiedInterpolants, 859 SizeOfPredicates, 11 NumberOfNonLiveVariables, 429 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-17 16:40:08,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...