/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/11_fmaxsymopt-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:19:10,081 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:19:10,145 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 11:19:10,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:19:10,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:19:10,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:19:10,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:19:10,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:19:10,172 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:19:10,175 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:19:10,175 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:19:10,175 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:19:10,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:19:10,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:19:10,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:19:10,177 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:19:10,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:19:10,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:19:10,177 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:19:10,177 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:19:10,177 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:19:10,178 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:19:10,178 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:19:10,178 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:19:10,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:19:10,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:10,179 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:19:10,179 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:19:10,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:19:10,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:19:10,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:19:10,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:19:10,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:19:10,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:19:10,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:19:10,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:19:10,393 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:19:10,393 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:19:10,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt-pthread.i [2023-11-17 11:19:11,359 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:19:11,599 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:19:11,600 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt-pthread.i [2023-11-17 11:19:11,612 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a628c950/77521eb52eac43cfbe7a5c11c86b997b/FLAGee831c3af [2023-11-17 11:19:11,628 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a628c950/77521eb52eac43cfbe7a5c11c86b997b [2023-11-17 11:19:11,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:19:11,631 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:19:11,633 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:11,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:19:11,636 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:19:11,636 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:11" (1/1) ... [2023-11-17 11:19:11,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@403dd571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:11, skipping insertion in model container [2023-11-17 11:19:11,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:11" (1/1) ... [2023-11-17 11:19:11,682 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:19:11,943 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/11_fmaxsymopt-pthread.i[30846,30859] [2023-11-17 11:19:11,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:11,963 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:19:11,985 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/11_fmaxsymopt-pthread.i[30846,30859] [2023-11-17 11:19:11,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:12,009 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:19:12,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12 WrapperNode [2023-11-17 11:19:12,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:12,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:12,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:19:12,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:19:12,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,036 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2023-11-17 11:19:12,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:12,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:19:12,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:19:12,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:19:12,043 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,049 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,052 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,058 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:19:12,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:19:12,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:19:12,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:19:12,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (1/1) ... [2023-11-17 11:19:12,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:19:12,083 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 11:19:12,088 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 11:19:12,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:19:12,102 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:19:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:19:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:19:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:19:12,104 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 11:19:12,216 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:19:12,218 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:19:12,393 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:19:12,512 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:19:12,513 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:19:12,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:12 BoogieIcfgContainer [2023-11-17 11:19:12,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:19:12,516 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:19:12,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:19:12,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:19:12,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:19:11" (1/3) ... [2023-11-17 11:19:12,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15460345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:12, skipping insertion in model container [2023-11-17 11:19:12,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:12" (2/3) ... [2023-11-17 11:19:12,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15460345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:12, skipping insertion in model container [2023-11-17 11:19:12,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:12" (3/3) ... [2023-11-17 11:19:12,521 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-pthread.i [2023-11-17 11:19:12,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:19:12,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:19:12,534 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:19:12,567 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:12,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 20 transitions, 44 flow [2023-11-17 11:19:12,623 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-17 11:19:12,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:12,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-17 11:19:12,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 20 transitions, 44 flow [2023-11-17 11:19:12,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 20 transitions, 44 flow [2023-11-17 11:19:12,632 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:12,642 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 20 transitions, 44 flow [2023-11-17 11:19:12,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 20 transitions, 44 flow [2023-11-17 11:19:12,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 20 transitions, 44 flow [2023-11-17 11:19:12,651 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-17 11:19:12,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:12,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-17 11:19:12,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 112 [2023-11-17 11:19:13,249 INFO L134 LiptonReduction]: Checked pairs total: 196 [2023-11-17 11:19:13,249 INFO L136 LiptonReduction]: Total number of compositions: 16 [2023-11-17 11:19:13,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:13,270 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;@6e92ec01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:13,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:19:13,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:13,276 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 11:19:13,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:13,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:13,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:19:13,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:19:13,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash 241903454, now seen corresponding path program 1 times [2023-11-17 11:19:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253798261] [2023-11-17 11:19:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:13,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:13,446 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 11:19:13,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:13,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253798261] [2023-11-17 11:19:13,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253798261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:13,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:13,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:13,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740466840] [2023-11-17 11:19:13,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:13,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:13,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:13,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2023-11-17 11:19:13,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 2 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 11:19:13,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:13,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2023-11-17 11:19:13,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:13,497 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-11-17 11:19:13,498 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:13,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-17 11:19:13,500 INFO L140 encePairwiseOnDemand]: 34/36 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-17 11:19:13,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 11:19:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 21 transitions. [2023-11-17 11:19:13,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2916666666666667 [2023-11-17 11:19:13,508 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 21 transitions. [2023-11-17 11:19:13,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 21 transitions. [2023-11-17 11:19:13,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:13,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 21 transitions. [2023-11-17 11:19:13,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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 11:19:13,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 11:19:13,515 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 11:19:13,516 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 2 states and 21 transitions. [2023-11-17 11:19:13,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 11:19:13,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:13,519 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-17 11:19:13,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-11-17 11:19:13,524 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-17 11:19:13,524 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-17 11:19:13,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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 11:19:13,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:13,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:19:13,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:19:13,525 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 11:19:13,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1090929727, now seen corresponding path program 1 times [2023-11-17 11:19:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:13,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035444977] [2023-11-17 11:19:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:13,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:13,576 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:13,618 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:13,618 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:13,619 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:19:13,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:19:13,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:19:13,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:19:13,621 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:13,623 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:13,623 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:19:13,642 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 80 flow [2023-11-17 11:19:13,656 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-11-17 11:19:13,657 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:13,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 6/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:19:13,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 80 flow [2023-11-17 11:19:13,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 35 transitions, 80 flow [2023-11-17 11:19:13,659 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:13,659 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 35 transitions, 80 flow [2023-11-17 11:19:13,659 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 35 transitions, 80 flow [2023-11-17 11:19:13,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 80 flow [2023-11-17 11:19:13,672 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-11-17 11:19:13,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:13,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 6/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:19:13,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 644 [2023-11-17 11:19:14,096 INFO L134 LiptonReduction]: Checked pairs total: 1191 [2023-11-17 11:19:14,097 INFO L136 LiptonReduction]: Total number of compositions: 15 [2023-11-17 11:19:14,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:14,099 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;@6e92ec01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:14,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:19:14,101 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:14,101 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 11:19:14,102 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:14,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:14,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:19:14,102 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 11:19:14,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash 418259668, now seen corresponding path program 1 times [2023-11-17 11:19:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:14,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241097189] [2023-11-17 11:19:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:14,130 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 11:19:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241097189] [2023-11-17 11:19:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241097189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:14,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236356676] [2023-11-17 11:19:14,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:14,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:14,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2023-11-17 11:19:14,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 27 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 11:19:14,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:14,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2023-11-17 11:19:14,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:14,218 INFO L124 PetriNetUnfolderBase]: 267/470 cut-off events. [2023-11-17 11:19:14,218 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-17 11:19:14,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 470 events. 267/470 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1758 event pairs, 222 based on Foata normal form. 45/425 useless extension candidates. Maximal degree in co-relation 539. Up to 438 conditions per place. [2023-11-17 11:19:14,224 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 19 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-11-17 11:19:14,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 22 transitions, 92 flow [2023-11-17 11:19:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2023-11-17 11:19:14,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-17 11:19:14,226 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 46 transitions. [2023-11-17 11:19:14,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 46 transitions. [2023-11-17 11:19:14,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:14,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 46 transitions. [2023-11-17 11:19:14,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 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 11:19:14,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 11:19:14,229 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 11:19:14,229 INFO L175 Difference]: Start difference. First operand has 26 places, 27 transitions, 64 flow. Second operand 2 states and 46 transitions. [2023-11-17 11:19:14,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 22 transitions, 92 flow [2023-11-17 11:19:14,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:14,230 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 54 flow [2023-11-17 11:19:14,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=54, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-17 11:19:14,231 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2023-11-17 11:19:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 54 flow [2023-11-17 11:19:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 11:19:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:14,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:14,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:19:14,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:19:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1779405410, now seen corresponding path program 1 times [2023-11-17 11:19:14,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430437370] [2023-11-17 11:19:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:14,328 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 11:19:14,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:14,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430437370] [2023-11-17 11:19:14,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430437370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:14,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:14,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810599228] [2023-11-17 11:19:14,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:14,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:14,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:14,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2023-11-17 11:19:14,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 11:19:14,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:14,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2023-11-17 11:19:14,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:14,404 INFO L124 PetriNetUnfolderBase]: 305/534 cut-off events. [2023-11-17 11:19:14,404 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-17 11:19:14,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 534 events. 305/534 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2075 event pairs, 222 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 1059. Up to 438 conditions per place. [2023-11-17 11:19:14,407 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-11-17 11:19:14,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 141 flow [2023-11-17 11:19:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-17 11:19:14,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-11-17 11:19:14,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-17 11:19:14,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-17 11:19:14,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:14,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-17 11:19:14,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 11:19:14,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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 11:19:14,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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 11:19:14,409 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 54 flow. Second operand 3 states and 64 transitions. [2023-11-17 11:19:14,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 141 flow [2023-11-17 11:19:14,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 141 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:14,410 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 66 flow [2023-11-17 11:19:14,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-17 11:19:14,411 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-11-17 11:19:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 66 flow [2023-11-17 11:19:14,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 11:19:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:14,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:19:14,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:19:14,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:19:14,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash 195801472, now seen corresponding path program 1 times [2023-11-17 11:19:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810031590] [2023-11-17 11:19:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:14,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:14,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:14,433 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:14,433 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:19:14,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:19:14,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:19:14,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:19:14,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:19:14,434 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:19:14,434 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:14,434 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:19:14,458 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:14,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 50 transitions, 118 flow [2023-11-17 11:19:14,466 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2023-11-17 11:19:14,467 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:14,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 9/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-11-17 11:19:14,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 50 transitions, 118 flow [2023-11-17 11:19:14,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 50 transitions, 118 flow [2023-11-17 11:19:14,468 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:14,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 48 places, 50 transitions, 118 flow [2023-11-17 11:19:14,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 48 places, 50 transitions, 118 flow [2023-11-17 11:19:14,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 50 transitions, 118 flow [2023-11-17 11:19:14,472 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2023-11-17 11:19:14,473 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:14,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 9/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-11-17 11:19:14,475 INFO L119 LiptonReduction]: Number of co-enabled transitions 1596 [2023-11-17 11:19:15,071 INFO L134 LiptonReduction]: Checked pairs total: 3137 [2023-11-17 11:19:15,072 INFO L136 LiptonReduction]: Total number of compositions: 21 [2023-11-17 11:19:15,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:15,077 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;@6e92ec01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:15,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:19:15,079 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:15,080 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 11:19:15,080 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:15,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:15,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:19:15,080 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 11:19:15,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1953365015, now seen corresponding path program 1 times [2023-11-17 11:19:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029925513] [2023-11-17 11:19:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:15,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:15,110 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 11:19:15,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029925513] [2023-11-17 11:19:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029925513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:15,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:15,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:15,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972996666] [2023-11-17 11:19:15,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:15,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:15,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:15,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 71 [2023-11-17 11:19:15,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 94 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 11:19:15,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:15,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 71 [2023-11-17 11:19:15,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:15,460 INFO L124 PetriNetUnfolderBase]: 3060/4499 cut-off events. [2023-11-17 11:19:15,460 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2023-11-17 11:19:15,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8982 conditions, 4499 events. 3060/4499 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20952 event pairs, 2574 based on Foata normal form. 486/4013 useless extension candidates. Maximal degree in co-relation 959. Up to 4260 conditions per place. [2023-11-17 11:19:15,480 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 27 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-11-17 11:19:15,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-11-17 11:19:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2023-11-17 11:19:15,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647887323943662 [2023-11-17 11:19:15,481 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 66 transitions. [2023-11-17 11:19:15,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 66 transitions. [2023-11-17 11:19:15,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:15,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 66 transitions. [2023-11-17 11:19:15,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 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 11:19:15,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 11:19:15,482 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 11:19:15,482 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 94 flow. Second operand 2 states and 66 transitions. [2023-11-17 11:19:15,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-11-17 11:19:15,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 132 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:15,484 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 78 flow [2023-11-17 11:19:15,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, 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=78, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-17 11:19:15,485 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-11-17 11:19:15,485 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 78 flow [2023-11-17 11:19:15,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 11:19:15,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:15,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:15,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:19:15,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:15,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash -283118626, now seen corresponding path program 1 times [2023-11-17 11:19:15,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987031890] [2023-11-17 11:19:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:15,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:15,524 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 11:19:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:15,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987031890] [2023-11-17 11:19:15,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987031890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:15,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:15,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:15,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441153781] [2023-11-17 11:19:15,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:15,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:15,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:15,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:15,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 71 [2023-11-17 11:19:15,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 11:19:15,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:15,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 71 [2023-11-17 11:19:15,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:15,845 INFO L124 PetriNetUnfolderBase]: 3497/5107 cut-off events. [2023-11-17 11:19:15,846 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-17 11:19:15,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10174 conditions, 5107 events. 3497/5107 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 24160 event pairs, 2574 based on Foata normal form. 0/4045 useless extension candidates. Maximal degree in co-relation 10168. Up to 4260 conditions per place. [2023-11-17 11:19:15,872 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-17 11:19:15,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 218 flow [2023-11-17 11:19:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-17 11:19:15,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460093896713615 [2023-11-17 11:19:15,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-17 11:19:15,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-17 11:19:15,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:15,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-17 11:19:15,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 11:19:15,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:19:15,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:19:15,875 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 78 flow. Second operand 3 states and 95 transitions. [2023-11-17 11:19:15,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 218 flow [2023-11-17 11:19:15,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:15,876 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 90 flow [2023-11-17 11:19:15,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-17 11:19:15,877 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-17 11:19:15,877 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 90 flow [2023-11-17 11:19:15,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 11:19:15,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:15,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:15,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:19:15,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:15,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash -184639380, now seen corresponding path program 1 times [2023-11-17 11:19:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:15,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073286464] [2023-11-17 11:19:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:19:15,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:15,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073286464] [2023-11-17 11:19:15,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073286464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:15,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:15,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604648730] [2023-11-17 11:19:15,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:15,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 71 [2023-11-17 11:19:15,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 11:19:15,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:15,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 71 [2023-11-17 11:19:15,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:16,190 INFO L124 PetriNetUnfolderBase]: 3060/4424 cut-off events. [2023-11-17 11:19:16,190 INFO L125 PetriNetUnfolderBase]: For 1052/1052 co-relation queries the response was YES. [2023-11-17 11:19:16,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9716 conditions, 4424 events. 3060/4424 cut-off events. For 1052/1052 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20277 event pairs, 1790 based on Foata normal form. 0/3623 useless extension candidates. Maximal degree in co-relation 9708. Up to 3044 conditions per place. [2023-11-17 11:19:16,213 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-17 11:19:16,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 48 transitions, 222 flow [2023-11-17 11:19:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-17 11:19:16,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380281690140845 [2023-11-17 11:19:16,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-17 11:19:16,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-17 11:19:16,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:16,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-17 11:19:16,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 11:19:16,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:19:16,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:19:16,215 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 90 flow. Second operand 3 states and 72 transitions. [2023-11-17 11:19:16,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 48 transitions, 222 flow [2023-11-17 11:19:16,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:19:16,217 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 86 flow [2023-11-17 11:19:16,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-11-17 11:19:16,217 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-17 11:19:16,217 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 86 flow [2023-11-17 11:19:16,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 11:19:16,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:16,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:16,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:19:16,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:16,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:16,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1070129795, now seen corresponding path program 1 times [2023-11-17 11:19:16,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:16,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418492490] [2023-11-17 11:19:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:16,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:19:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418492490] [2023-11-17 11:19:16,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418492490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:16,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:16,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119621657] [2023-11-17 11:19:16,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:16,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:16,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 71 [2023-11-17 11:19:16,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 11:19:16,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:16,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 71 [2023-11-17 11:19:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:16,561 INFO L124 PetriNetUnfolderBase]: 3494/5104 cut-off events. [2023-11-17 11:19:16,561 INFO L125 PetriNetUnfolderBase]: For 978/978 co-relation queries the response was YES. [2023-11-17 11:19:16,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11139 conditions, 5104 events. 3494/5104 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23901 event pairs, 2574 based on Foata normal form. 0/4237 useless extension candidates. Maximal degree in co-relation 11131. Up to 4260 conditions per place. [2023-11-17 11:19:16,586 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-17 11:19:16,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 227 flow [2023-11-17 11:19:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-17 11:19:16,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431924882629108 [2023-11-17 11:19:16,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-17 11:19:16,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-17 11:19:16,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:16,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-17 11:19:16,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 11:19:16,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:19:16,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:19:16,590 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 86 flow. Second operand 3 states and 92 transitions. [2023-11-17 11:19:16,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 227 flow [2023-11-17 11:19:16,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:19:16,593 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 94 flow [2023-11-17 11:19:16,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-17 11:19:16,594 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-17 11:19:16,594 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 94 flow [2023-11-17 11:19:16,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 11:19:16,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:16,595 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:19:16,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:19:16,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:16,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash 289237856, now seen corresponding path program 1 times [2023-11-17 11:19:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:16,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337577609] [2023-11-17 11:19:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:16,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:16,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:16,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:16,620 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:16,620 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:19:16,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:19:16,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:19:16,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:19:16,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:19:16,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:19:16,621 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-17 11:19:16,622 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:16,622 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:19:16,646 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:16,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 158 flow [2023-11-17 11:19:16,656 INFO L124 PetriNetUnfolderBase]: 12/76 cut-off events. [2023-11-17 11:19:16,656 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:16,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 12/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2023-11-17 11:19:16,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 65 transitions, 158 flow [2023-11-17 11:19:16,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 65 transitions, 158 flow [2023-11-17 11:19:16,657 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:16,658 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 65 transitions, 158 flow [2023-11-17 11:19:16,658 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 65 transitions, 158 flow [2023-11-17 11:19:16,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 158 flow [2023-11-17 11:19:16,663 INFO L124 PetriNetUnfolderBase]: 12/76 cut-off events. [2023-11-17 11:19:16,663 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:16,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 12/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2023-11-17 11:19:16,665 INFO L119 LiptonReduction]: Number of co-enabled transitions 2968 [2023-11-17 11:19:17,449 INFO L134 LiptonReduction]: Checked pairs total: 5598 [2023-11-17 11:19:17,449 INFO L136 LiptonReduction]: Total number of compositions: 31 [2023-11-17 11:19:17,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:17,451 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;@6e92ec01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:17,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:19:17,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:17,452 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 11:19:17,453 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:17,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:17,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:19:17,453 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 11:19:17,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 591243177, now seen corresponding path program 1 times [2023-11-17 11:19:17,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:17,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585654771] [2023-11-17 11:19:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:17,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:17,464 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 11:19:17,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:17,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585654771] [2023-11-17 11:19:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585654771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:17,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:17,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105640696] [2023-11-17 11:19:17,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:17,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 96 [2023-11-17 11:19:17,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 126 flow. Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 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 11:19:17,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:17,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 96 [2023-11-17 11:19:17,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:19,785 INFO L124 PetriNetUnfolderBase]: 29814/39905 cut-off events. [2023-11-17 11:19:19,786 INFO L125 PetriNetUnfolderBase]: For 4532/4532 co-relation queries the response was YES. [2023-11-17 11:19:19,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80061 conditions, 39905 events. 29814/39905 cut-off events. For 4532/4532 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 208202 event pairs, 25212 based on Foata normal form. 4602/35303 useless extension candidates. Maximal degree in co-relation 9034. Up to 38217 conditions per place. [2023-11-17 11:19:20,006 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 35 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2023-11-17 11:19:20,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 178 flow [2023-11-17 11:19:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 86 transitions. [2023-11-17 11:19:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-11-17 11:19:20,008 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 86 transitions. [2023-11-17 11:19:20,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 86 transitions. [2023-11-17 11:19:20,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:20,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 86 transitions. [2023-11-17 11:19:20,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 11:19:20,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 11:19:20,009 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 11:19:20,009 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 126 flow. Second operand 2 states and 86 transitions. [2023-11-17 11:19:20,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 178 flow [2023-11-17 11:19:20,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 172 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:20,012 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 102 flow [2023-11-17 11:19:20,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-17 11:19:20,012 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-11-17 11:19:20,012 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 102 flow [2023-11-17 11:19:20,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 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 11:19:20,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:20,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:19:20,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:20,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1248995732, now seen corresponding path program 1 times [2023-11-17 11:19:20,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:20,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519961441] [2023-11-17 11:19:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:20,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:20,039 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 11:19:20,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:20,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519961441] [2023-11-17 11:19:20,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519961441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:20,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:20,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:20,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244108803] [2023-11-17 11:19:20,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:20,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:20,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 96 [2023-11-17 11:19:20,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 11:19:20,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:20,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 96 [2023-11-17 11:19:20,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:22,692 INFO L124 PetriNetUnfolderBase]: 34073/45367 cut-off events. [2023-11-17 11:19:22,692 INFO L125 PetriNetUnfolderBase]: For 2208/2208 co-relation queries the response was YES. [2023-11-17 11:19:22,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90419 conditions, 45367 events. 34073/45367 cut-off events. For 2208/2208 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 238427 event pairs, 25212 based on Foata normal form. 0/35191 useless extension candidates. Maximal degree in co-relation 90412. Up to 38217 conditions per place. [2023-11-17 11:19:22,886 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 60 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-17 11:19:22,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 295 flow [2023-11-17 11:19:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-17 11:19:22,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-17 11:19:22,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-17 11:19:22,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-17 11:19:22,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:22,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-17 11:19:22,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 11:19:22,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:22,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:22,888 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 102 flow. Second operand 3 states and 126 transitions. [2023-11-17 11:19:22,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 295 flow [2023-11-17 11:19:22,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 295 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:22,893 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 114 flow [2023-11-17 11:19:22,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-17 11:19:22,894 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-11-17 11:19:22,894 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 114 flow [2023-11-17 11:19:22,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 11:19:22,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:22,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:22,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:19:22,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:22,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash 67210504, now seen corresponding path program 1 times [2023-11-17 11:19:22,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:22,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950690767] [2023-11-17 11:19:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:22,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:22,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950690767] [2023-11-17 11:19:22,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950690767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:19:22,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126663514] [2023-11-17 11:19:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:22,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:19:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:19:22,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:19:22,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:19:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:23,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:19:23,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:19:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:23,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:19:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:23,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126663514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:19:23,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:19:23,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-17 11:19:23,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153115907] [2023-11-17 11:19:23,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:19:23,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:19:23,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:19:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:19:23,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 96 [2023-11-17 11:19:23,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 11:19:23,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:23,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 96 [2023-11-17 11:19:23,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:26,044 INFO L124 PetriNetUnfolderBase]: 38332/50832 cut-off events. [2023-11-17 11:19:26,044 INFO L125 PetriNetUnfolderBase]: For 7186/7186 co-relation queries the response was YES. [2023-11-17 11:19:26,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108716 conditions, 50832 events. 38332/50832 cut-off events. For 7186/7186 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 268990 event pairs, 25212 based on Foata normal form. 0/39684 useless extension candidates. Maximal degree in co-relation 108707. Up to 38217 conditions per place. [2023-11-17 11:19:26,341 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 86 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2023-11-17 11:19:26,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 94 transitions, 430 flow [2023-11-17 11:19:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:19:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:19:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 174 transitions. [2023-11-17 11:19:26,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2023-11-17 11:19:26,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 174 transitions. [2023-11-17 11:19:26,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 174 transitions. [2023-11-17 11:19:26,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:26,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 174 transitions. [2023-11-17 11:19:26,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 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 11:19:26,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 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 11:19:26,343 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 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 11:19:26,343 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 114 flow. Second operand 4 states and 174 transitions. [2023-11-17 11:19:26,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 94 transitions, 430 flow [2023-11-17 11:19:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 94 transitions, 426 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:19:26,352 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 126 flow [2023-11-17 11:19:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-17 11:19:26,353 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2023-11-17 11:19:26,353 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 126 flow [2023-11-17 11:19:26,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 11:19:26,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:26,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:26,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:19:26,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 11:19:26,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:26,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2086574100, now seen corresponding path program 2 times [2023-11-17 11:19:26,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:26,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675030385] [2023-11-17 11:19:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:26,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:19:26,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675030385] [2023-11-17 11:19:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675030385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:26,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:26,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403271571] [2023-11-17 11:19:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:26,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 96 [2023-11-17 11:19:26,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 11:19:26,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:26,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 96 [2023-11-17 11:19:26,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:29,464 INFO L124 PetriNetUnfolderBase]: 34073/45115 cut-off events. [2023-11-17 11:19:29,474 INFO L125 PetriNetUnfolderBase]: For 16442/16442 co-relation queries the response was YES. [2023-11-17 11:19:29,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102170 conditions, 45115 events. 34073/45115 cut-off events. For 16442/16442 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 234733 event pairs, 21439 based on Foata normal form. 0/36139 useless extension candidates. Maximal degree in co-relation 102160. Up to 32758 conditions per place. [2023-11-17 11:19:29,709 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 60 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-17 11:19:29,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 313 flow [2023-11-17 11:19:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2023-11-17 11:19:29,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3368055555555556 [2023-11-17 11:19:29,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 97 transitions. [2023-11-17 11:19:29,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 97 transitions. [2023-11-17 11:19:29,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:29,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 97 transitions. [2023-11-17 11:19:29,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 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 11:19:29,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:29,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:29,711 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 126 flow. Second operand 3 states and 97 transitions. [2023-11-17 11:19:29,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 313 flow [2023-11-17 11:19:29,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 305 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 11:19:29,717 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 118 flow [2023-11-17 11:19:29,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-11-17 11:19:29,718 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-11-17 11:19:29,718 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 118 flow [2023-11-17 11:19:29,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 11:19:29,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:29,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:29,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 11:19:29,718 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:29,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash 465788734, now seen corresponding path program 1 times [2023-11-17 11:19:29,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:29,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483924615] [2023-11-17 11:19:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:29,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:19:29,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:29,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483924615] [2023-11-17 11:19:29,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483924615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:29,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:29,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:29,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665430829] [2023-11-17 11:19:29,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:29,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:29,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:29,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 96 [2023-11-17 11:19:29,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 11:19:29,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:29,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 96 [2023-11-17 11:19:29,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:32,832 INFO L124 PetriNetUnfolderBase]: 38937/51827 cut-off events. [2023-11-17 11:19:32,832 INFO L125 PetriNetUnfolderBase]: For 11943/11943 co-relation queries the response was YES. [2023-11-17 11:19:32,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114274 conditions, 51827 events. 38937/51827 cut-off events. For 11943/11943 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 274647 event pairs, 28985 based on Foata normal form. 0/41960 useless extension candidates. Maximal degree in co-relation 114264. Up to 43676 conditions per place. [2023-11-17 11:19:33,106 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 61 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-17 11:19:33,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 324 flow [2023-11-17 11:19:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-17 11:19:33,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2023-11-17 11:19:33,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-17 11:19:33,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-17 11:19:33,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:33,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-17 11:19:33,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 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 11:19:33,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:33,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:33,108 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 118 flow. Second operand 3 states and 123 transitions. [2023-11-17 11:19:33,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 324 flow [2023-11-17 11:19:33,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:19:33,118 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 126 flow [2023-11-17 11:19:33,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-17 11:19:33,119 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2023-11-17 11:19:33,119 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 126 flow [2023-11-17 11:19:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 11:19:33,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:33,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:19:33,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:33,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1556868391, now seen corresponding path program 1 times [2023-11-17 11:19:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:33,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70994273] [2023-11-17 11:19:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:33,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:19:33,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:33,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70994273] [2023-11-17 11:19:33,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70994273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:33,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:33,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:33,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875906105] [2023-11-17 11:19:33,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:33,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:33,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:33,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 96 [2023-11-17 11:19:33,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:33,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:33,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 96 [2023-11-17 11:19:33,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:35,833 INFO L124 PetriNetUnfolderBase]: 34073/44995 cut-off events. [2023-11-17 11:19:35,834 INFO L125 PetriNetUnfolderBase]: For 14835/14835 co-relation queries the response was YES. [2023-11-17 11:19:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104091 conditions, 44995 events. 34073/44995 cut-off events. For 14835/14835 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 231701 event pairs, 20319 based on Foata normal form. 0/37387 useless extension candidates. Maximal degree in co-relation 104080. Up to 31212 conditions per place. [2023-11-17 11:19:36,112 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 60 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-17 11:19:36,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 320 flow [2023-11-17 11:19:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2023-11-17 11:19:36,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3263888888888889 [2023-11-17 11:19:36,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2023-11-17 11:19:36,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2023-11-17 11:19:36,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:36,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2023-11-17 11:19:36,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 11:19:36,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:36,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:36,114 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 126 flow. Second operand 3 states and 94 transitions. [2023-11-17 11:19:36,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 320 flow [2023-11-17 11:19:36,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 316 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:19:36,122 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 122 flow [2023-11-17 11:19:36,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-11-17 11:19:36,123 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-11-17 11:19:36,123 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 122 flow [2023-11-17 11:19:36,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:36,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:36,123 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:36,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 11:19:36,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:36,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:36,124 INFO L85 PathProgramCache]: Analyzing trace with hash 343380922, now seen corresponding path program 1 times [2023-11-17 11:19:36,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:36,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12201823] [2023-11-17 11:19:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:19:36,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12201823] [2023-11-17 11:19:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12201823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:36,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:36,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278869550] [2023-11-17 11:19:36,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:36,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:36,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:36,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 96 [2023-11-17 11:19:36,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 11:19:36,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:36,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 96 [2023-11-17 11:19:36,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:39,217 INFO L124 PetriNetUnfolderBase]: 38889/51779 cut-off events. [2023-11-17 11:19:39,217 INFO L125 PetriNetUnfolderBase]: For 15006/15006 co-relation queries the response was YES. [2023-11-17 11:19:39,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119171 conditions, 51779 events. 38889/51779 cut-off events. For 15006/15006 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 272877 event pairs, 28985 based on Foata normal form. 0/43475 useless extension candidates. Maximal degree in co-relation 119160. Up to 43676 conditions per place. [2023-11-17 11:19:39,501 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 60 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-17 11:19:39,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 325 flow [2023-11-17 11:19:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-17 11:19:39,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-17 11:19:39,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-17 11:19:39,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-17 11:19:39,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:39,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-17 11:19:39,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 11:19:39,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:39,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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 11:19:39,503 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 122 flow. Second operand 3 states and 120 transitions. [2023-11-17 11:19:39,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 325 flow [2023-11-17 11:19:39,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 317 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:19:39,520 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 130 flow [2023-11-17 11:19:39,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-11-17 11:19:39,520 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2023-11-17 11:19:39,520 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 130 flow [2023-11-17 11:19:39,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 11:19:39,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:39,521 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:39,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 11:19:39,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:39,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:39,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1934493042, now seen corresponding path program 1 times [2023-11-17 11:19:39,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:39,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834982376] [2023-11-17 11:19:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:39,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:39,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:39,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:39,545 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:39,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:19:39,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:19:39,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:19:39,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:19:39,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:19:39,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:19:39,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 11:19:39,546 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:39,546 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:39,546 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:19:39,574 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:39,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 80 transitions, 200 flow [2023-11-17 11:19:39,584 INFO L124 PetriNetUnfolderBase]: 15/94 cut-off events. [2023-11-17 11:19:39,584 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:19:39,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 94 events. 15/94 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 255 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-11-17 11:19:39,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 80 transitions, 200 flow [2023-11-17 11:19:39,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 80 transitions, 200 flow [2023-11-17 11:19:39,585 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:39,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 80 transitions, 200 flow [2023-11-17 11:19:39,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 80 transitions, 200 flow [2023-11-17 11:19:39,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 80 transitions, 200 flow [2023-11-17 11:19:39,590 INFO L124 PetriNetUnfolderBase]: 15/94 cut-off events. [2023-11-17 11:19:39,590 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:19:39,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 94 events. 15/94 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 255 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-11-17 11:19:39,592 INFO L119 LiptonReduction]: Number of co-enabled transitions 4760 [2023-11-17 11:19:40,607 INFO L134 LiptonReduction]: Checked pairs total: 9016 [2023-11-17 11:19:40,607 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-11-17 11:19:40,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:40,608 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;@6e92ec01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:40,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:19:40,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:40,610 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 11:19:40,610 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:40,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:40,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:19:40,610 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 11:19:40,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash -419556494, now seen corresponding path program 1 times [2023-11-17 11:19:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:40,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030898541] [2023-11-17 11:19:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:40,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:40,619 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 11:19:40,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:40,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030898541] [2023-11-17 11:19:40,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030898541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:40,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003308943] [2023-11-17 11:19:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:40,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:40,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 117 [2023-11-17 11:19:40,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 160 flow. Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 11:19:40,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:40,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 117 [2023-11-17 11:19:40,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:00,074 INFO L124 PetriNetUnfolderBase]: 267513/338168 cut-off events. [2023-11-17 11:20:00,075 INFO L125 PetriNetUnfolderBase]: For 49218/49218 co-relation queries the response was YES. [2023-11-17 11:20:00,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680851 conditions, 338168 events. 267513/338168 cut-off events. For 49218/49218 co-relation queries the response was YES. Maximal size of possible extension queue 6767. Compared 1897890 event pairs, 226896 based on Foata normal form. 40617/297551 useless extension candidates. Maximal degree in co-relation 80455. Up to 326337 conditions per place. [2023-11-17 11:20:02,149 INFO L140 encePairwiseOnDemand]: 106/117 looper letters, 43 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-11-17 11:20:02,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 224 flow [2023-11-17 11:20:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:20:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:20:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 106 transitions. [2023-11-17 11:20:02,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2023-11-17 11:20:02,151 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 106 transitions. [2023-11-17 11:20:02,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 106 transitions. [2023-11-17 11:20:02,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:02,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 106 transitions. [2023-11-17 11:20:02,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 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 11:20:02,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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 11:20:02,159 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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 11:20:02,159 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 160 flow. Second operand 2 states and 106 transitions. [2023-11-17 11:20:02,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 224 flow [2023-11-17 11:20:02,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 212 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:20:02,206 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 126 flow [2023-11-17 11:20:02,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-17 11:20:02,206 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-11-17 11:20:02,206 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 126 flow [2023-11-17 11:20:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 11:20:02,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:02,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 11:20:02,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:20:02,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 533124893, now seen corresponding path program 1 times [2023-11-17 11:20:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:02,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122030142] [2023-11-17 11:20:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:02,245 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 11:20:02,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:02,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122030142] [2023-11-17 11:20:02,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122030142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:02,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:02,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:20:02,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506175255] [2023-11-17 11:20:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:02,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:20:02,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:20:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:20:02,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 117 [2023-11-17 11:20:02,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 11:20:02,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:02,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 117 [2023-11-17 11:20:02,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand