/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:19:31,068 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:19:31,130 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:19:31,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:19:31,168 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:19:31,169 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:19:31,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:19:31,169 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:19:31,170 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:19:31,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:19:31,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:19:31,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:19:31,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:19:31,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:19:31,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:19:31,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:19:31,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:19:31,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:19:31,175 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:19:31,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:19:31,176 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:19:31,176 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:19:31,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:19:31,177 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:19:31,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:19:31,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:31,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:19:31,177 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:19:31,177 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:19:31,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:19:31,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:19:31,178 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:19:31,178 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:19:31,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:19:31,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:19:31,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:19:31,400 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:19:31,400 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:19:31,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-11-17 11:19:32,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:19:32,765 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:19:32,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-11-17 11:19:32,776 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bffa168/c6656a45df6a4450a2db1c86aae86aa6/FLAG85f7329a0 [2023-11-17 11:19:32,788 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bffa168/c6656a45df6a4450a2db1c86aae86aa6 [2023-11-17 11:19:32,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:19:32,793 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:19:32,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:32,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:19:32,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:19:32,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:32" (1/1) ... [2023-11-17 11:19:32,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c73bb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:32, skipping insertion in model container [2023-11-17 11:19:32,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:32" (1/1) ... [2023-11-17 11:19:32,843 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:19:33,041 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/14_spin2003.i[30203,30216] [2023-11-17 11:19:33,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:33,057 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:19:33,095 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/14_spin2003.i[30203,30216] [2023-11-17 11:19:33,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:33,122 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:19:33,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33 WrapperNode [2023-11-17 11:19:33,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:33,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:33,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:19:33,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:19:33,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,147 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 46 [2023-11-17 11:19:33,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:33,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:19:33,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:19:33,149 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:19:33,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,162 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,169 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:19:33,172 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:19:33,172 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:19:33,172 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:19:33,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (1/1) ... [2023-11-17 11:19:33,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:33,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:19:33,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:19:33,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:19:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:19:33,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:19:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:19:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:19:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:19:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:19:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:19:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:19:33,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:19:33,227 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:19:33,306 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:19:33,308 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:19:33,393 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:19:33,463 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:19:33,463 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 11:19:33,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:33 BoogieIcfgContainer [2023-11-17 11:19:33,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:19:33,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:19:33,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:19:33,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:19:33,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:19:32" (1/3) ... [2023-11-17 11:19:33,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f39419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:33, skipping insertion in model container [2023-11-17 11:19:33,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:33" (2/3) ... [2023-11-17 11:19:33,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f39419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:33, skipping insertion in model container [2023-11-17 11:19:33,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:33" (3/3) ... [2023-11-17 11:19:33,481 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-11-17 11:19:33,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:19:33,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:19:33,495 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:19:33,548 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:33,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:33,588 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-17 11:19:33,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:33,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 17 events. 1/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-11-17 11:19:33,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:33,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:33,595 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:33,604 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:33,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:33,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:33,617 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-17 11:19:33,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:33,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 17 events. 1/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-11-17 11:19:33,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 72 [2023-11-17 11:19:33,957 INFO L134 LiptonReduction]: Checked pairs total: 98 [2023-11-17 11:19:33,957 INFO L136 LiptonReduction]: Total number of compositions: 12 [2023-11-17 11:19:33,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:33,978 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:33,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:19:33,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:33,982 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:33,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:33,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:33,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:33,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:19:33,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash 4957675, now seen corresponding path program 1 times [2023-11-17 11:19:33,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:33,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585060453] [2023-11-17 11:19:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:33,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:34,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585060453] [2023-11-17 11:19:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585060453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:34,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:34,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676441540] [2023-11-17 11:19:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:34,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:34,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-17 11:19:34,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:34,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-17 11:19:34,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:34,157 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:19:34,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:34,157 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 11:19:34,158 INFO L140 encePairwiseOnDemand]: 25/27 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 11:19:34,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 11:19:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 17 transitions. [2023-11-17 11:19:34,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2023-11-17 11:19:34,167 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 17 transitions. [2023-11-17 11:19:34,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 17 transitions. [2023-11-17 11:19:34,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:34,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 17 transitions. [2023-11-17 11:19:34,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,172 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,173 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 17 transitions. [2023-11-17 11:19:34,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 11:19:34,175 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 11:19:34,176 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 11:19:34,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, 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 11:19:34,180 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-17 11:19:34,180 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 11:19:34,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:34,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:19:34,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:19:34,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:19:34,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:34,182 INFO L85 PathProgramCache]: Analyzing trace with hash 469336669, now seen corresponding path program 1 times [2023-11-17 11:19:34,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:34,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543628199] [2023-11-17 11:19:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:34,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:34,198 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:34,221 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:34,222 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:34,223 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:19:34,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:19:34,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:19:34,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:19:34,225 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:34,227 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:34,227 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:19:34,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:34,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:34,241 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2023-11-17 11:19:34,241 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:34,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 30 events. 2/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 3 conditions per place. [2023-11-17 11:19:34,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:34,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:34,242 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:34,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:34,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:34,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:34,250 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2023-11-17 11:19:34,251 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:34,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 30 events. 2/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 3 conditions per place. [2023-11-17 11:19:34,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 324 [2023-11-17 11:19:34,568 INFO L134 LiptonReduction]: Checked pairs total: 653 [2023-11-17 11:19:34,568 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 11:19:34,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:34,573 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:34,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:19:34,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:34,575 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:19:34,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:34,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:34,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:34,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:19:34,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash 6096980, now seen corresponding path program 1 times [2023-11-17 11:19:34,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:34,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676597118] [2023-11-17 11:19:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:34,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676597118] [2023-11-17 11:19:34,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676597118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:34,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429889782] [2023-11-17 11:19:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:34,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:34,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:34,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2023-11-17 11:19:34,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 15 transitions, 40 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:34,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2023-11-17 11:19:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:34,659 INFO L124 PetriNetUnfolderBase]: 34/75 cut-off events. [2023-11-17 11:19:34,659 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-17 11:19:34,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 75 events. 34/75 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 195 event pairs, 34 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 42. Up to 73 conditions per place. [2023-11-17 11:19:34,660 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 9 selfloop transitions, 0 changer transitions 0/10 dead transitions. [2023-11-17 11:19:34,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 10 transitions, 48 flow [2023-11-17 11:19:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2023-11-17 11:19:34,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2023-11-17 11:19:34,662 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 32 transitions. [2023-11-17 11:19:34,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 32 transitions. [2023-11-17 11:19:34,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:34,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 32 transitions. [2023-11-17 11:19:34,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,663 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,663 INFO L175 Difference]: Start difference. First operand has 18 places, 15 transitions, 40 flow. Second operand 2 states and 32 transitions. [2023-11-17 11:19:34,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 10 transitions, 48 flow [2023-11-17 11:19:34,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 48 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:34,664 INFO L231 Difference]: Finished difference. Result has 16 places, 10 transitions, 30 flow [2023-11-17 11:19:34,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=30, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2023-11-17 11:19:34,665 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -2 predicate places. [2023-11-17 11:19:34,665 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 30 flow [2023-11-17 11:19:34,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:34,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:34,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:19:34,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:19:34,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:19:34,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1531135844, now seen corresponding path program 1 times [2023-11-17 11:19:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:34,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053390378] [2023-11-17 11:19:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:34,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:34,703 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:34,719 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:34,719 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:34,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:19:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:19:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:19:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:19:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:19:34,720 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:34,721 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:34,721 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:19:34,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:34,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:34,749 INFO L124 PetriNetUnfolderBase]: 3/43 cut-off events. [2023-11-17 11:19:34,749 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:34,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 3/43 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2023-11-17 11:19:34,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:34,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:34,753 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:34,753 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:34,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:34,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:34,762 INFO L124 PetriNetUnfolderBase]: 3/43 cut-off events. [2023-11-17 11:19:34,762 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:34,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 3/43 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2023-11-17 11:19:34,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2023-11-17 11:19:35,263 INFO L134 LiptonReduction]: Checked pairs total: 2073 [2023-11-17 11:19:35,263 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-11-17 11:19:35,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:35,265 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:35,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:19:35,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:35,266 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:35,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:35,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:35,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:35,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:35,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash 7790401, now seen corresponding path program 1 times [2023-11-17 11:19:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:35,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547307270] [2023-11-17 11:19:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:35,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547307270] [2023-11-17 11:19:35,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547307270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:35,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:35,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:35,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426405498] [2023-11-17 11:19:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:35,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:35,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:35,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 68 [2023-11-17 11:19:35,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:35,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:35,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 68 [2023-11-17 11:19:35,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:35,348 INFO L124 PetriNetUnfolderBase]: 178/306 cut-off events. [2023-11-17 11:19:35,348 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-17 11:19:35,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 306 events. 178/306 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1038 event pairs, 178 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 162. Up to 298 conditions per place. [2023-11-17 11:19:35,357 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 12 selfloop transitions, 0 changer transitions 0/13 dead transitions. [2023-11-17 11:19:35,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 68 flow [2023-11-17 11:19:35,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2023-11-17 11:19:35,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33088235294117646 [2023-11-17 11:19:35,359 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 45 transitions. [2023-11-17 11:19:35,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 45 transitions. [2023-11-17 11:19:35,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:35,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 45 transitions. [2023-11-17 11:19:35,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:35,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:35,363 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:35,363 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 58 flow. Second operand 2 states and 45 transitions. [2023-11-17 11:19:35,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 68 flow [2023-11-17 11:19:35,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 13 transitions, 66 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:35,365 INFO L231 Difference]: Finished difference. Result has 21 places, 13 transitions, 42 flow [2023-11-17 11:19:35,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=13} [2023-11-17 11:19:35,365 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-11-17 11:19:35,365 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 13 transitions, 42 flow [2023-11-17 11:19:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:35,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:35,366 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:19:35,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:19:35,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:35,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash 587143068, now seen corresponding path program 1 times [2023-11-17 11:19:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:35,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299811642] [2023-11-17 11:19:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:35,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:35,381 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:35,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:35,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:35,392 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:19:35,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:19:35,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:19:35,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:19:35,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:19:35,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:19:35,393 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:35,393 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:35,393 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:19:35,403 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:35,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:35,408 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2023-11-17 11:19:35,408 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:35,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 56 events. 4/56 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 121 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2023-11-17 11:19:35,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:35,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:35,409 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:35,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:35,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:35,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:35,413 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2023-11-17 11:19:35,413 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:35,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 56 events. 4/56 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 121 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2023-11-17 11:19:35,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 1368 [2023-11-17 11:19:36,224 INFO L134 LiptonReduction]: Checked pairs total: 3883 [2023-11-17 11:19:36,225 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-11-17 11:19:36,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:36,228 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:36,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:19:36,229 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:36,229 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:36,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:36,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:36,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:36,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:36,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 10191846, now seen corresponding path program 1 times [2023-11-17 11:19:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:36,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877267243] [2023-11-17 11:19:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:36,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:36,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:36,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877267243] [2023-11-17 11:19:36,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877267243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:36,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:36,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11140006] [2023-11-17 11:19:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:36,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 92 [2023-11-17 11:19:36,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:36,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:36,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 92 [2023-11-17 11:19:36,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:36,334 INFO L124 PetriNetUnfolderBase]: 772/1161 cut-off events. [2023-11-17 11:19:36,334 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-17 11:19:36,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 1161 events. 772/1161 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4515 event pairs, 772 based on Foata normal form. 0/1161 useless extension candidates. Maximal degree in co-relation 663. Up to 1135 conditions per place. [2023-11-17 11:19:36,340 INFO L140 encePairwiseOnDemand]: 83/92 looper letters, 15 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2023-11-17 11:19:36,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 90 flow [2023-11-17 11:19:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 58 transitions. [2023-11-17 11:19:36,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31521739130434784 [2023-11-17 11:19:36,341 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 58 transitions. [2023-11-17 11:19:36,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 58 transitions. [2023-11-17 11:19:36,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:36,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 58 transitions. [2023-11-17 11:19:36,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:36,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:36,342 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:36,343 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 78 flow. Second operand 2 states and 58 transitions. [2023-11-17 11:19:36,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 90 flow [2023-11-17 11:19:36,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 16 transitions, 84 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:36,344 INFO L231 Difference]: Finished difference. Result has 26 places, 16 transitions, 54 flow [2023-11-17 11:19:36,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=16} [2023-11-17 11:19:36,345 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-11-17 11:19:36,345 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 16 transitions, 54 flow [2023-11-17 11:19:36,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:36,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:36,345 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:36,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:19:36,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:36,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:36,346 INFO L85 PathProgramCache]: Analyzing trace with hash -430149710, now seen corresponding path program 1 times [2023-11-17 11:19:36,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:36,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794710464] [2023-11-17 11:19:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:36,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:36,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:36,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:36,372 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:36,372 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:19:36,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:19:36,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:19:36,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:19:36,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:19:36,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:19:36,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:19:36,373 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:36,374 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:36,374 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:19:36,386 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:36,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:36,392 INFO L124 PetriNetUnfolderBase]: 5/69 cut-off events. [2023-11-17 11:19:36,392 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:19:36,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 69 events. 5/69 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 154 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 74. Up to 6 conditions per place. [2023-11-17 11:19:36,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:36,393 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:36,393 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:36,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:36,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:36,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:36,398 INFO L124 PetriNetUnfolderBase]: 5/69 cut-off events. [2023-11-17 11:19:36,398 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:19:36,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 69 events. 5/69 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 154 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 74. Up to 6 conditions per place. [2023-11-17 11:19:36,400 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-17 11:19:37,361 INFO L134 LiptonReduction]: Checked pairs total: 5856 [2023-11-17 11:19:37,361 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-11-17 11:19:37,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:37,366 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:37,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:19:37,368 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:37,369 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:19:37,369 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:37,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:37,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:37,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:19:37,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 13332121, now seen corresponding path program 1 times [2023-11-17 11:19:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:37,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176966596] [2023-11-17 11:19:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:37,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:37,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:37,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176966596] [2023-11-17 11:19:37,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176966596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:37,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:37,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:37,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717045034] [2023-11-17 11:19:37,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:37,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:37,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:37,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 112 [2023-11-17 11:19:37,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:37,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:37,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 112 [2023-11-17 11:19:37,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:37,642 INFO L124 PetriNetUnfolderBase]: 3040/4212 cut-off events. [2023-11-17 11:19:37,643 INFO L125 PetriNetUnfolderBase]: For 2174/2174 co-relation queries the response was YES. [2023-11-17 11:19:37,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9018 conditions, 4212 events. 3040/4212 cut-off events. For 2174/2174 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17818 event pairs, 3040 based on Foata normal form. 0/4212 useless extension candidates. Maximal degree in co-relation 2517. Up to 4132 conditions per place. [2023-11-17 11:19:37,668 INFO L140 encePairwiseOnDemand]: 101/112 looper letters, 18 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-11-17 11:19:37,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 19 transitions, 114 flow [2023-11-17 11:19:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2023-11-17 11:19:37,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3169642857142857 [2023-11-17 11:19:37,670 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 71 transitions. [2023-11-17 11:19:37,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 71 transitions. [2023-11-17 11:19:37,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:37,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 71 transitions. [2023-11-17 11:19:37,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:37,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:37,673 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:37,673 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 100 flow. Second operand 2 states and 71 transitions. [2023-11-17 11:19:37,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 19 transitions, 114 flow [2023-11-17 11:19:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 19 transitions, 102 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:37,675 INFO L231 Difference]: Finished difference. Result has 31 places, 19 transitions, 66 flow [2023-11-17 11:19:37,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=19} [2023-11-17 11:19:37,677 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-11-17 11:19:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 19 transitions, 66 flow [2023-11-17 11:19:37,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:37,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:37,678 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:37,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:19:37,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:19:37,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1141360219, now seen corresponding path program 1 times [2023-11-17 11:19:37,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:37,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643066442] [2023-11-17 11:19:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:37,727 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:37,749 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:37,750 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:37,750 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:19:37,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:19:37,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 11:19:37,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:19:37,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:19:37,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:19:37,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:19:37,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:19:37,751 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:37,751 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:37,751 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 11:19:37,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:37,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:37,778 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-11-17 11:19:37,779 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:19:37,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 82 events. 6/82 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 94. Up to 7 conditions per place. [2023-11-17 11:19:37,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:37,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:37,781 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:37,781 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:37,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:37,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:37,786 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-11-17 11:19:37,786 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:19:37,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 82 events. 6/82 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 94. Up to 7 conditions per place. [2023-11-17 11:19:37,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 3132 [2023-11-17 11:19:38,740 INFO L134 LiptonReduction]: Checked pairs total: 8628 [2023-11-17 11:19:38,741 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-11-17 11:19:38,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:38,742 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:38,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 11:19:38,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:38,743 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 11:19:38,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:38,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:38,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:38,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:19:38,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash 17088063, now seen corresponding path program 1 times [2023-11-17 11:19:38,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878654229] [2023-11-17 11:19:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:38,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:38,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878654229] [2023-11-17 11:19:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878654229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913083870] [2023-11-17 11:19:38,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:38,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:38,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 130 [2023-11-17 11:19:38,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:38,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:38,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 130 [2023-11-17 11:19:38,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:39,934 INFO L124 PetriNetUnfolderBase]: 11302/14823 cut-off events. [2023-11-17 11:19:39,935 INFO L125 PetriNetUnfolderBase]: For 9628/9628 co-relation queries the response was YES. [2023-11-17 11:19:39,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31780 conditions, 14823 events. 11302/14823 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 66378 event pairs, 11302 based on Foata normal form. 0/14823 useless extension candidates. Maximal degree in co-relation 9132. Up to 14581 conditions per place. [2023-11-17 11:19:40,005 INFO L140 encePairwiseOnDemand]: 117/130 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-11-17 11:19:40,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 22 transitions, 140 flow [2023-11-17 11:19:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 84 transitions. [2023-11-17 11:19:40,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3230769230769231 [2023-11-17 11:19:40,007 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 84 transitions. [2023-11-17 11:19:40,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 84 transitions. [2023-11-17 11:19:40,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:40,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 84 transitions. [2023-11-17 11:19:40,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:40,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:40,008 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:40,008 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 124 flow. Second operand 2 states and 84 transitions. [2023-11-17 11:19:40,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 22 transitions, 140 flow [2023-11-17 11:19:40,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 22 transitions, 120 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:40,013 INFO L231 Difference]: Finished difference. Result has 36 places, 22 transitions, 78 flow [2023-11-17 11:19:40,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2023-11-17 11:19:40,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-11-17 11:19:40,014 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 78 flow [2023-11-17 11:19:40,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:40,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:40,014 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:40,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:19:40,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:19:40,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash 713705507, now seen corresponding path program 1 times [2023-11-17 11:19:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459029452] [2023-11-17 11:19:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:40,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:40,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:40,042 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:40,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 11:19:40,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 11:19:40,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-17 11:19:40,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 11:19:40,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 11:19:40,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 11:19:40,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 11:19:40,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 11:19:40,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:19:40,043 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:40,043 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:40,043 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-17 11:19:40,061 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:40,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:40,071 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-17 11:19:40,071 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 11:19:40,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 95 events. 7/95 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 115. Up to 8 conditions per place. [2023-11-17 11:19:40,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:40,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:40,072 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:40,073 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:40,073 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:40,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:40,078 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-17 11:19:40,078 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 11:19:40,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 95 events. 7/95 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 115. Up to 8 conditions per place. [2023-11-17 11:19:40,080 INFO L119 LiptonReduction]: Number of co-enabled transitions 4284 [2023-11-17 11:19:41,343 INFO L134 LiptonReduction]: Checked pairs total: 11889 [2023-11-17 11:19:41,343 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-11-17 11:19:41,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:41,345 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:41,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 11:19:41,346 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:41,346 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:19:41,346 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:41,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:41,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:41,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 11:19:41,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash 21398125, now seen corresponding path program 1 times [2023-11-17 11:19:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:41,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893467915] [2023-11-17 11:19:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:41,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:41,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:41,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893467915] [2023-11-17 11:19:41,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893467915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:41,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104753153] [2023-11-17 11:19:41,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:41,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:41,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:41,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 154 [2023-11-17 11:19:41,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:41,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:41,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 154 [2023-11-17 11:19:41,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:45,202 INFO L124 PetriNetUnfolderBase]: 40462/51030 cut-off events. [2023-11-17 11:19:45,202 INFO L125 PetriNetUnfolderBase]: For 40003/40003 co-relation queries the response was YES. [2023-11-17 11:19:45,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109541 conditions, 51030 events. 40462/51030 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 237613 event pairs, 40462 based on Foata normal form. 0/51030 useless extension candidates. Maximal degree in co-relation 32136. Up to 50302 conditions per place. [2023-11-17 11:19:45,448 INFO L140 encePairwiseOnDemand]: 139/154 looper letters, 24 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-11-17 11:19:45,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 25 transitions, 168 flow [2023-11-17 11:19:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 97 transitions. [2023-11-17 11:19:45,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31493506493506496 [2023-11-17 11:19:45,451 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 97 transitions. [2023-11-17 11:19:45,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 97 transitions. [2023-11-17 11:19:45,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:45,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 97 transitions. [2023-11-17 11:19:45,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:45,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:45,453 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:45,453 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 150 flow. Second operand 2 states and 97 transitions. [2023-11-17 11:19:45,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 25 transitions, 168 flow [2023-11-17 11:19:45,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 25 transitions, 138 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:45,478 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 90 flow [2023-11-17 11:19:45,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-11-17 11:19:45,479 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-11-17 11:19:45,479 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 90 flow [2023-11-17 11:19:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:45,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:45,479 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:45,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:19:45,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 11:19:45,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1052113050, now seen corresponding path program 1 times [2023-11-17 11:19:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056386687] [2023-11-17 11:19:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:45,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:45,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:45,510 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 11:19:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 11:19:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 11:19:45,512 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:45,512 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:45,512 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-17 11:19:45,531 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:45,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:45,538 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-17 11:19:45,538 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 11:19:45,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 108 events. 8/108 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 285 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 137. Up to 9 conditions per place. [2023-11-17 11:19:45,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:45,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:45,539 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:45,540 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:45,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:45,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:45,547 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-17 11:19:45,547 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 11:19:45,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 108 events. 8/108 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 285 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 137. Up to 9 conditions per place. [2023-11-17 11:19:45,549 INFO L119 LiptonReduction]: Number of co-enabled transitions 5616 [2023-11-17 11:19:47,196 INFO L134 LiptonReduction]: Checked pairs total: 16409 [2023-11-17 11:19:47,197 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-11-17 11:19:47,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:47,198 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:47,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-17 11:19:47,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:47,199 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:47,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:47,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:47,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:47,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-17 11:19:47,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash 26446985, now seen corresponding path program 1 times [2023-11-17 11:19:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:47,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344174590] [2023-11-17 11:19:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:47,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:47,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:47,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344174590] [2023-11-17 11:19:47,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344174590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:47,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:47,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:47,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550431192] [2023-11-17 11:19:47,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:47,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:47,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:47,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:47,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 178 [2023-11-17 11:19:47,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:47,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:47,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 178 [2023-11-17 11:19:47,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:58,972 INFO L124 PetriNetUnfolderBase]: 141064/172773 cut-off events. [2023-11-17 11:19:58,973 INFO L125 PetriNetUnfolderBase]: For 158830/158830 co-relation queries the response was YES. [2023-11-17 11:19:59,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371253 conditions, 172773 events. 141064/172773 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4154. Compared 829156 event pairs, 141064 based on Foata normal form. 0/172773 useless extension candidates. Maximal degree in co-relation 110625. Up to 170587 conditions per place. [2023-11-17 11:19:59,856 INFO L140 encePairwiseOnDemand]: 161/178 looper letters, 27 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-11-17 11:19:59,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 28 transitions, 198 flow [2023-11-17 11:19:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 110 transitions. [2023-11-17 11:19:59,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3089887640449438 [2023-11-17 11:19:59,858 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 110 transitions. [2023-11-17 11:19:59,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 110 transitions. [2023-11-17 11:19:59,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:59,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 110 transitions. [2023-11-17 11:19:59,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,859 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,859 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 178 flow. Second operand 2 states and 110 transitions. [2023-11-17 11:19:59,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 28 transitions, 198 flow [2023-11-17 11:19:59,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 28 transitions, 156 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:59,925 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 102 flow [2023-11-17 11:19:59,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-11-17 11:19:59,926 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-11-17 11:19:59,926 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 102 flow [2023-11-17 11:19:59,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:59,926 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:59,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:19:59,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-17 11:19:59,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1831363228, now seen corresponding path program 1 times [2023-11-17 11:19:59,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:59,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309325936] [2023-11-17 11:19:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:59,938 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:59,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:59,950 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:59,951 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-17 11:19:59,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-11-17 11:19:59,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-11-17 11:19:59,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-11-17 11:19:59,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-11-17 11:19:59,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-11-17 11:19:59,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-11-17 11:19:59,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-11-17 11:19:59,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-11-17 11:19:59,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-11-17 11:19:59,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 11:19:59,953 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:59,954 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:59,954 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-11-17 11:19:59,971 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:59,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:59,979 INFO L124 PetriNetUnfolderBase]: 9/121 cut-off events. [2023-11-17 11:19:59,979 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-17 11:19:59,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 121 events. 9/121 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 317 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 160. Up to 10 conditions per place. [2023-11-17 11:19:59,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:59,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:59,980 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:59,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:59,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:59,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:59,986 INFO L124 PetriNetUnfolderBase]: 9/121 cut-off events. [2023-11-17 11:19:59,987 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-17 11:19:59,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 121 events. 9/121 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 317 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 160. Up to 10 conditions per place. [2023-11-17 11:19:59,990 INFO L119 LiptonReduction]: Number of co-enabled transitions 7128 [2023-11-17 11:20:02,052 INFO L134 LiptonReduction]: Checked pairs total: 20645 [2023-11-17 11:20:02,052 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-11-17 11:20:02,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:02,054 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;@5ccd91b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:02,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-17 11:20:02,055 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:02,055 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:20:02,055 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:02,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:02,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:20:02,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 11:20:02,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash 32234679, now seen corresponding path program 1 times [2023-11-17 11:20:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014579432] [2023-11-17 11:20:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:02,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014579432] [2023-11-17 11:20:02,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014579432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:02,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:02,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:20:02,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680221471] [2023-11-17 11:20:02,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:20:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:20:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:20:02,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 198 [2023-11-17 11:20:02,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 208 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:02,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:02,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 198 [2023-11-17 11:20:02,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:48,126 INFO L124 PetriNetUnfolderBase]: 482236/577368 cut-off events. [2023-11-17 11:20:48,127 INFO L125 PetriNetUnfolderBase]: For 609350/609350 co-relation queries the response was YES. [2023-11-17 11:20:49,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1241680 conditions, 577368 events. 482236/577368 cut-off events. For 609350/609350 co-relation queries the response was YES. Maximal size of possible extension queue 11980. Compared 2840491 event pairs, 482236 based on Foata normal form. 0/577368 useless extension candidates. Maximal degree in co-relation 374523. Up to 570808 conditions per place. [2023-11-17 11:20:51,930 INFO L140 encePairwiseOnDemand]: 179/198 looper letters, 30 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-11-17 11:20:51,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 31 transitions, 230 flow [2023-11-17 11:20:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:20:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:20:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 123 transitions. [2023-11-17 11:20:51,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3106060606060606 [2023-11-17 11:20:51,932 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 123 transitions. [2023-11-17 11:20:51,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 123 transitions. [2023-11-17 11:20:51,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:51,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 123 transitions. [2023-11-17 11:20:51,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 61.5) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:51,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:51,941 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:51,941 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 208 flow. Second operand 2 states and 123 transitions. [2023-11-17 11:20:51,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 31 transitions, 230 flow [2023-11-17 11:20:52,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 31 transitions, 174 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-11-17 11:20:52,846 INFO L231 Difference]: Finished difference. Result has 51 places, 31 transitions, 114 flow [2023-11-17 11:20:52,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=31} [2023-11-17 11:20:52,848 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-11-17 11:20:52,848 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 31 transitions, 114 flow [2023-11-17 11:20:52,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:52,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:52,848 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:52,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 11:20:52,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 11:20:52,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash -251790951, now seen corresponding path program 1 times [2023-11-17 11:20:52,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:52,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922395768] [2023-11-17 11:20:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:52,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:52,869 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:52,880 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:52,880 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2023-11-17 11:20:52,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2023-11-17 11:20:52,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 11:20:52,882 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:20:52,882 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:52,882 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-11-17 11:20:52,902 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:52,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 105 transitions, 340 flow [2023-11-17 11:20:52,911 INFO L124 PetriNetUnfolderBase]: 10/134 cut-off events. [2023-11-17 11:20:52,911 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-17 11:20:52,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 134 events. 10/134 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 346 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 184. Up to 11 conditions per place. [2023-11-17 11:20:52,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 105 transitions, 340 flow [2023-11-17 11:20:52,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 105 transitions, 340 flow [2023-11-17 11:20:52,912 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:52,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 105 transitions, 340 flow [2023-11-17 11:20:52,913 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 105 transitions, 340 flow [2023-11-17 11:20:52,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 105 transitions, 340 flow [2023-11-17 11:20:52,920 INFO L124 PetriNetUnfolderBase]: 10/134 cut-off events. [2023-11-17 11:20:52,920 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-17 11:20:52,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 134 events. 10/134 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 346 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 184. Up to 11 conditions per place. [2023-11-17 11:20:52,924 INFO L119 LiptonReduction]: Number of co-enabled transitions 8820