/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-ext/03_incdec.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:05:51,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:05:51,615 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:05:51,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:05:51,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:05:51,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:05:51,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:05:51,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:05:51,632 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:05:51,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:05:51,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:05:51,633 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:05:51,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:05:51,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:05:51,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:05:51,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:05:51,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:05:51,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:05:51,636 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:05:51,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:05:51,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:05:51,640 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:05:51,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:05:51,640 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:05:51,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:05:51,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:05:51,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:05:51,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:05:51,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:05:51,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:05:51,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:05:51,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:05:51,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:05:51,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:05:51,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:05:51,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:05:51,865 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:05:51,865 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:05:51,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-11-17 15:05:52,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:05:53,213 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:05:53,214 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-11-17 15:05:53,225 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf28cbe9f/c84a60de9c0846fd82f49d09192f6a70/FLAG79c6de6cf [2023-11-17 15:05:53,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf28cbe9f/c84a60de9c0846fd82f49d09192f6a70 [2023-11-17 15:05:53,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:05:53,237 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:05:53,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:05:53,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:05:53,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:05:53,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499190bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53, skipping insertion in model container [2023-11-17 15:05:53,247 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,282 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:05:53,488 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-ext/03_incdec.i[30534,30547] [2023-11-17 15:05:53,496 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-ext/03_incdec.i[30928,30941] [2023-11-17 15:05:53,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:05:53,511 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:05:53,551 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-ext/03_incdec.i[30534,30547] [2023-11-17 15:05:53,553 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-ext/03_incdec.i[30928,30941] [2023-11-17 15:05:53,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:05:53,589 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:05:53,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53 WrapperNode [2023-11-17 15:05:53,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:05:53,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:05:53,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:05:53,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:05:53,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,606 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,631 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 133 [2023-11-17 15:05:53,631 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:05:53,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:05:53,632 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:05:53,632 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:05:53,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,651 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:05:53,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:05:53,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:05:53,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:05:53,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (1/1) ... [2023-11-17 15:05:53,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:05:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:05:53,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:05:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:05:53,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:05:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:05:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:05:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:05:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:05:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:05:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:05:53,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:05:53,710 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:05:53,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:05:53,870 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:05:53,873 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:05:54,071 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:05:54,177 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:05:54,178 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 15:05:54,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:05:54 BoogieIcfgContainer [2023-11-17 15:05:54,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:05:54,180 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:05:54,180 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:05:54,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:05:54,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:05:53" (1/3) ... [2023-11-17 15:05:54,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9f8099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:05:54, skipping insertion in model container [2023-11-17 15:05:54,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:53" (2/3) ... [2023-11-17 15:05:54,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9f8099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:05:54, skipping insertion in model container [2023-11-17 15:05:54,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:05:54" (3/3) ... [2023-11-17 15:05:54,194 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-11-17 15:05:54,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:05:54,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 15:05:54,208 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:05:54,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:54,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 170 flow [2023-11-17 15:05:54,326 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2023-11-17 15:05:54,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:54,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-17 15:05:54,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 170 flow [2023-11-17 15:05:54,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 170 flow [2023-11-17 15:05:54,338 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:54,361 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-17 15:05:54,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-17 15:05:54,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 170 flow [2023-11-17 15:05:54,384 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2023-11-17 15:05:54,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:54,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-17 15:05:54,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 1540 [2023-11-17 15:05:57,212 INFO L134 LiptonReduction]: Checked pairs total: 1514 [2023-11-17 15:05:57,212 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-11-17 15:05:57,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:57,236 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;@594e0a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:57,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:05:57,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:57,241 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:05:57,241 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:57,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:57,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:05:57,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 15:05:57,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash 18786765, now seen corresponding path program 1 times [2023-11-17 15:05:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374145982] [2023-11-17 15:05:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:05:57,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:57,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374145982] [2023-11-17 15:05:57,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374145982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:57,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:57,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:05:57,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249177749] [2023-11-17 15:05:57,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:57,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:05:57,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:05:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:05:57,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 193 [2023-11-17 15:05:57,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 22 flow. Second operand has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:05:57,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:57,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 193 [2023-11-17 15:05:57,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:57,433 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:05:57,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:57,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 15:05:57,434 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 15:05:57,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 15:05:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:05:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:05:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 140 transitions. [2023-11-17 15:05:57,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626943005181347 [2023-11-17 15:05:57,443 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 140 transitions. [2023-11-17 15:05:57,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 140 transitions. [2023-11-17 15:05:57,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:57,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 140 transitions. [2023-11-17 15:05:57,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:05:57,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:05:57,450 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:05:57,451 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 22 flow. Second operand 2 states and 140 transitions. [2023-11-17 15:05:57,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 15:05:57,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:57,453 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 15:05:57,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-17 15:05:57,457 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2023-11-17 15:05:57,457 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 15:05:57,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:05:57,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:57,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:05:57,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:05:57,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 15:05:57,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash 874153935, now seen corresponding path program 1 times [2023-11-17 15:05:57,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:57,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410145209] [2023-11-17 15:05:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:57,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:57,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:05:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:57,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:05:57,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:05:57,528 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:05:57,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:05:57,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:05:57,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:05:57,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:05:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:05:57,530 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:05:57,532 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:05:57,532 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:05:57,549 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:57,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 139 transitions, 288 flow [2023-11-17 15:05:57,576 INFO L124 PetriNetUnfolderBase]: 13/163 cut-off events. [2023-11-17 15:05:57,577 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:57,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 518 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2023-11-17 15:05:57,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 139 transitions, 288 flow [2023-11-17 15:05:57,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 139 transitions, 288 flow [2023-11-17 15:05:57,582 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:57,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 139 transitions, 288 flow [2023-11-17 15:05:57,583 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 139 transitions, 288 flow [2023-11-17 15:05:57,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 139 transitions, 288 flow [2023-11-17 15:05:57,600 INFO L124 PetriNetUnfolderBase]: 13/163 cut-off events. [2023-11-17 15:05:57,601 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:57,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 518 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2023-11-17 15:05:57,606 INFO L119 LiptonReduction]: Number of co-enabled transitions 9240 [2023-11-17 15:05:59,870 INFO L134 LiptonReduction]: Checked pairs total: 50020 [2023-11-17 15:05:59,871 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-11-17 15:05:59,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:59,873 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;@594e0a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:59,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:05:59,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:59,877 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2023-11-17 15:05:59,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:59,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:59,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:59,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 15:05:59,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:59,877 INFO L85 PathProgramCache]: Analyzing trace with hash -812502883, now seen corresponding path program 1 times [2023-11-17 15:05:59,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:59,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191416530] [2023-11-17 15:05:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:59,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:00,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:00,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191416530] [2023-11-17 15:06:00,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191416530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:00,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:00,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:06:00,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730590439] [2023-11-17 15:06:00,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:00,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:06:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:06:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:06:00,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 274 [2023-11-17 15:06:00,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:00,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:00,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 274 [2023-11-17 15:06:00,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:00,302 INFO L124 PetriNetUnfolderBase]: 893/1581 cut-off events. [2023-11-17 15:06:00,302 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-17 15:06:00,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 1581 events. 893/1581 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9656 event pairs, 235 based on Foata normal form. 0/1357 useless extension candidates. Maximal degree in co-relation 2274. Up to 613 conditions per place. [2023-11-17 15:06:00,310 INFO L140 encePairwiseOnDemand]: 257/274 looper letters, 99 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2023-11-17 15:06:00,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 119 transitions, 487 flow [2023-11-17 15:06:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:06:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:06:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 599 transitions. [2023-11-17 15:06:00,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36435523114355234 [2023-11-17 15:06:00,313 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 599 transitions. [2023-11-17 15:06:00,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 599 transitions. [2023-11-17 15:06:00,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:00,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 599 transitions. [2023-11-17 15:06:00,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:00,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:00,366 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:00,366 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 126 flow. Second operand 6 states and 599 transitions. [2023-11-17 15:06:00,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 119 transitions, 487 flow [2023-11-17 15:06:00,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 119 transitions, 487 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:00,368 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 211 flow [2023-11-17 15:06:00,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-11-17 15:06:00,369 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2023-11-17 15:06:00,369 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 211 flow [2023-11-17 15:06:00,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:00,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:00,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:06:00,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:06:00,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 15:06:00,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2021892665, now seen corresponding path program 1 times [2023-11-17 15:06:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:00,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011119944] [2023-11-17 15:06:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:00,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:00,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:00,387 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:00,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:06:00,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:06:00,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:06:00,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:06:00,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:06:00,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:06:00,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:06:00,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:06:00,388 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:06:00,388 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:00,388 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:06:00,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:00,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 195 transitions, 408 flow [2023-11-17 15:06:00,427 INFO L124 PetriNetUnfolderBase]: 19/232 cut-off events. [2023-11-17 15:06:00,427 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:06:00,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 232 events. 19/232 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 851 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-17 15:06:00,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 195 transitions, 408 flow [2023-11-17 15:06:00,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 195 transitions, 408 flow [2023-11-17 15:06:00,431 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:00,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 195 transitions, 408 flow [2023-11-17 15:06:00,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 195 transitions, 408 flow [2023-11-17 15:06:00,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 195 transitions, 408 flow [2023-11-17 15:06:00,448 INFO L124 PetriNetUnfolderBase]: 19/232 cut-off events. [2023-11-17 15:06:00,448 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:06:00,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 232 events. 19/232 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 851 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-17 15:06:00,458 INFO L119 LiptonReduction]: Number of co-enabled transitions 23100 [2023-11-17 15:06:03,795 INFO L134 LiptonReduction]: Checked pairs total: 117206 [2023-11-17 15:06:03,795 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-17 15:06:03,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:03,797 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;@594e0a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:03,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 15:06:03,800 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:03,800 INFO L124 PetriNetUnfolderBase]: 5/45 cut-off events. [2023-11-17 15:06:03,800 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:06:03,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:03,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:03,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:06:03,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1759941764, now seen corresponding path program 1 times [2023-11-17 15:06:03,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:03,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527970806] [2023-11-17 15:06:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:03,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:03,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:03,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527970806] [2023-11-17 15:06:03,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527970806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:03,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:03,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:03,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448358347] [2023-11-17 15:06:03,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:03,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:03,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:03,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 391 [2023-11-17 15:06:03,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:03,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:03,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 391 [2023-11-17 15:06:03,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:06,529 INFO L124 PetriNetUnfolderBase]: 30296/42807 cut-off events. [2023-11-17 15:06:06,529 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2023-11-17 15:06:06,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85893 conditions, 42807 events. 30296/42807 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 293062 event pairs, 13110 based on Foata normal form. 0/34831 useless extension candidates. Maximal degree in co-relation 14093. Up to 39627 conditions per place. [2023-11-17 15:06:06,764 INFO L140 encePairwiseOnDemand]: 377/391 looper letters, 91 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-11-17 15:06:06,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 428 flow [2023-11-17 15:06:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:06:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:06:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-11-17 15:06:06,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2023-11-17 15:06:06,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-11-17 15:06:06,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-11-17 15:06:06,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:06,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-11-17 15:06:06,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:06,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:06,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:06,773 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 186 flow. Second operand 3 states and 442 transitions. [2023-11-17 15:06:06,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 428 flow [2023-11-17 15:06:06,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 104 transitions, 424 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:06,784 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 212 flow [2023-11-17 15:06:06,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-11-17 15:06:06,786 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2023-11-17 15:06:06,786 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 212 flow [2023-11-17 15:06:06,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:06,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:06,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:06,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:06:06,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:06:06,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1668577830, now seen corresponding path program 1 times [2023-11-17 15:06:06,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:06,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528165223] [2023-11-17 15:06:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:06,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:06,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528165223] [2023-11-17 15:06:06,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528165223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:06,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:06,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:06:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744264131] [2023-11-17 15:06:06,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:06:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:06:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:06:06,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 391 [2023-11-17 15:06:06,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:06,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:06,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 391 [2023-11-17 15:06:06,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:10,211 INFO L124 PetriNetUnfolderBase]: 39831/56423 cut-off events. [2023-11-17 15:06:10,212 INFO L125 PetriNetUnfolderBase]: For 5444/5444 co-relation queries the response was YES. [2023-11-17 15:06:10,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118380 conditions, 56423 events. 39831/56423 cut-off events. For 5444/5444 co-relation queries the response was YES. Maximal size of possible extension queue 2910. Compared 407415 event pairs, 12429 based on Foata normal form. 248/49722 useless extension candidates. Maximal degree in co-relation 85193. Up to 28153 conditions per place. [2023-11-17 15:06:10,506 INFO L140 encePairwiseOnDemand]: 378/391 looper letters, 196 selfloop transitions, 17 changer transitions 0/222 dead transitions. [2023-11-17 15:06:10,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 222 transitions, 983 flow [2023-11-17 15:06:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:06:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:06:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 858 transitions. [2023-11-17 15:06:10,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657289002557545 [2023-11-17 15:06:10,508 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 858 transitions. [2023-11-17 15:06:10,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 858 transitions. [2023-11-17 15:06:10,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:10,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 858 transitions. [2023-11-17 15:06:10,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:10,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:10,514 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:10,514 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 212 flow. Second operand 6 states and 858 transitions. [2023-11-17 15:06:10,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 222 transitions, 983 flow [2023-11-17 15:06:10,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 222 transitions, 977 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:06:10,519 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 312 flow [2023-11-17 15:06:10,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2023-11-17 15:06:10,522 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2023-11-17 15:06:10,522 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 312 flow [2023-11-17 15:06:10,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:10,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:10,522 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:06:10,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:06:10,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:06:10,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:10,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1781714871, now seen corresponding path program 1 times [2023-11-17 15:06:10,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:10,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650932902] [2023-11-17 15:06:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:10,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:10,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:10,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:10,554 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:10,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 15:06:10,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 15:06:10,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 15:06:10,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 15:06:10,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 15:06:10,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 15:06:10,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 15:06:10,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 15:06:10,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 15:06:10,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:06:10,558 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:06:10,558 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:10,558 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:06:10,586 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:10,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 251 transitions, 530 flow [2023-11-17 15:06:10,616 INFO L124 PetriNetUnfolderBase]: 25/301 cut-off events. [2023-11-17 15:06:10,616 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:10,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 301 events. 25/301 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1206 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 240. Up to 10 conditions per place. [2023-11-17 15:06:10,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 251 transitions, 530 flow [2023-11-17 15:06:10,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 251 transitions, 530 flow [2023-11-17 15:06:10,621 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:10,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 251 transitions, 530 flow [2023-11-17 15:06:10,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 251 transitions, 530 flow [2023-11-17 15:06:10,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 251 transitions, 530 flow [2023-11-17 15:06:10,643 INFO L124 PetriNetUnfolderBase]: 25/301 cut-off events. [2023-11-17 15:06:10,643 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:10,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 301 events. 25/301 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1206 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 240. Up to 10 conditions per place. [2023-11-17 15:06:10,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 43120 [2023-11-17 15:06:15,652 INFO L134 LiptonReduction]: Checked pairs total: 256168 [2023-11-17 15:06:15,652 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-11-17 15:06:15,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:15,656 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;@594e0a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:15,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-17 15:06:15,660 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:15,660 INFO L124 PetriNetUnfolderBase]: 5/45 cut-off events. [2023-11-17 15:06:15,660 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:06:15,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:15,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:15,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-17 15:06:15,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:15,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1433542397, now seen corresponding path program 1 times [2023-11-17 15:06:15,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:15,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787944779] [2023-11-17 15:06:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:15,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:15,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787944779] [2023-11-17 15:06:15,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787944779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:15,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:15,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:06:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877618251] [2023-11-17 15:06:15,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:15,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:06:15,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:06:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:06:15,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 506 [2023-11-17 15:06:15,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 110 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:15,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:15,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 506 [2023-11-17 15:06:15,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand