/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:09:10,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:09:11,067 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:09:11,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:09:11,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:09:11,101 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:09:11,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:09:11,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:09:11,102 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:09:11,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:09:11,106 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:09:11,107 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:09:11,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:09:11,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:09:11,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:09:11,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:09:11,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:09:11,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:09:11,109 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:09:11,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:09:11,110 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:09:11,110 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:09:11,110 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:09:11,111 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:09:11,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:09:11,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:09:11,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:09:11,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:09:11,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:09:11,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:09:11,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:09:11,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:09:11,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:09:11,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:09:11,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:09:11,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:09:11,361 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:09:11,361 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:09:11,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-11-17 15:09:12,464 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:09:12,690 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:09:12,702 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-11-17 15:09:12,721 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c5a8f1fb/cc8405c5ef164ebf9d2bcb2a294072b0/FLAG41b9f4d26 [2023-11-17 15:09:12,734 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c5a8f1fb/cc8405c5ef164ebf9d2bcb2a294072b0 [2023-11-17 15:09:12,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:09:12,737 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:09:12,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:09:12,738 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:09:12,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:09:12,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:09:12" (1/1) ... [2023-11-17 15:09:12,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e05e6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:12, skipping insertion in model container [2023-11-17 15:09:12,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:09:12" (1/1) ... [2023-11-17 15:09:12,789 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:09:13,098 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/26_stack_cas_longest-2.i[31306,31319] [2023-11-17 15:09:13,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:09:13,118 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:09:13,164 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/26_stack_cas_longest-2.i[31306,31319] [2023-11-17 15:09:13,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:09:13,190 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:09:13,191 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:09:13,197 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:09:13,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13 WrapperNode [2023-11-17 15:09:13,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:09:13,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:09:13,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:09:13,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:09:13,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,238 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,272 INFO L138 Inliner]: procedures = 179, calls = 49, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2023-11-17 15:09:13,272 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:09:13,273 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:09:13,273 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:09:13,273 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:09:13,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:09:13,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:09:13,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:09:13,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:09:13,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (1/1) ... [2023-11-17 15:09:13,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:09:13,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:09:13,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:09:13,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:09:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:09:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:09:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:09:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:09:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:09:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:09:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:09:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:09:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:09:13,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:09:13,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:09:13,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:09:13,397 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:09:13,529 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:09:13,531 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:09:13,812 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:09:13,985 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:09:13,986 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 15:09:13,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:09:13 BoogieIcfgContainer [2023-11-17 15:09:13,987 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:09:13,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:09:13,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:09:13,992 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:09:13,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:09:12" (1/3) ... [2023-11-17 15:09:13,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bff5350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:09:13, skipping insertion in model container [2023-11-17 15:09:13,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:13" (2/3) ... [2023-11-17 15:09:13,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bff5350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:09:13, skipping insertion in model container [2023-11-17 15:09:13,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:09:13" (3/3) ... [2023-11-17 15:09:13,994 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-11-17 15:09:14,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:09:14,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:09:14,009 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:09:14,063 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:14,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 115 transitions, 234 flow [2023-11-17 15:09:14,148 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-11-17 15:09:14,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:14,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 11/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 92. Up to 4 conditions per place. [2023-11-17 15:09:14,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 115 transitions, 234 flow [2023-11-17 15:09:14,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 115 transitions, 234 flow [2023-11-17 15:09:14,168 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:14,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 115 transitions, 234 flow [2023-11-17 15:09:14,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 115 transitions, 234 flow [2023-11-17 15:09:14,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 115 transitions, 234 flow [2023-11-17 15:09:14,217 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-11-17 15:09:14,217 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:14,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 11/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 92. Up to 4 conditions per place. [2023-11-17 15:09:14,220 INFO L119 LiptonReduction]: Number of co-enabled transitions 2212 [2023-11-17 15:09:18,074 INFO L134 LiptonReduction]: Checked pairs total: 2713 [2023-11-17 15:09:18,074 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-11-17 15:09:18,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:18,093 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;@56e2cae0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:18,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:09:18,096 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:18,096 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-11-17 15:09:18,096 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:18,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:18,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:09:18,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:09:18,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1646911552, now seen corresponding path program 1 times [2023-11-17 15:09:18,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:18,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287081007] [2023-11-17 15:09:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:18,220 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:18,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:18,255 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:18,256 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:09:18,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:09:18,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:09:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:09:18,259 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:09:18,262 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:18,262 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:09:18,307 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:18,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 195 transitions, 400 flow [2023-11-17 15:09:18,346 INFO L124 PetriNetUnfolderBase]: 21/219 cut-off events. [2023-11-17 15:09:18,346 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:18,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 219 events. 21/219 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-11-17 15:09:18,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 195 transitions, 400 flow [2023-11-17 15:09:18,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 195 transitions, 400 flow [2023-11-17 15:09:18,352 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:18,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 195 transitions, 400 flow [2023-11-17 15:09:18,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 195 transitions, 400 flow [2023-11-17 15:09:18,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 195 transitions, 400 flow [2023-11-17 15:09:18,381 INFO L124 PetriNetUnfolderBase]: 21/219 cut-off events. [2023-11-17 15:09:18,381 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:18,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 219 events. 21/219 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-11-17 15:09:18,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 17064 [2023-11-17 15:09:23,115 INFO L134 LiptonReduction]: Checked pairs total: 31233 [2023-11-17 15:09:23,116 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-11-17 15:09:23,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:23,119 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;@56e2cae0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:23,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:09:23,128 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:23,128 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-11-17 15:09:23,128 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:23,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:23,129 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:09:23,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:09:23,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash -720926305, now seen corresponding path program 1 times [2023-11-17 15:09:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:23,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819568870] [2023-11-17 15:09:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:23,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:23,170 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:23,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:23,195 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:23,195 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:09:23,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:09:23,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:09:23,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:09:23,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:09:23,196 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:09:23,197 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:23,197 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:09:23,259 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:23,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:23,329 INFO L124 PetriNetUnfolderBase]: 31/312 cut-off events. [2023-11-17 15:09:23,329 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:23,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 312 events. 31/312 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 863 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 250. Up to 8 conditions per place. [2023-11-17 15:09:23,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:23,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:23,340 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:23,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:23,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:23,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:23,385 INFO L124 PetriNetUnfolderBase]: 31/312 cut-off events. [2023-11-17 15:09:23,385 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:23,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 312 events. 31/312 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 863 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 250. Up to 8 conditions per place. [2023-11-17 15:09:23,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 44556 [2023-11-17 15:09:29,743 INFO L134 LiptonReduction]: Checked pairs total: 83429 [2023-11-17 15:09:29,744 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-11-17 15:09:29,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:29,747 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;@56e2cae0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:29,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:09:29,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:29,754 INFO L124 PetriNetUnfolderBase]: 7/50 cut-off events. [2023-11-17 15:09:29,754 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:09:29,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:29,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:29,754 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 15:09:29,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash 577783014, now seen corresponding path program 1 times [2023-11-17 15:09:29,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:29,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712407204] [2023-11-17 15:09:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:29,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712407204] [2023-11-17 15:09:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712407204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:29,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:29,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:09:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544484924] [2023-11-17 15:09:29,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:29,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:09:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:09:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:09:29,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 513 [2023-11-17 15:09:29,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:29,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:29,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 513 [2023-11-17 15:09:29,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:36,210 INFO L124 PetriNetUnfolderBase]: 49695/70903 cut-off events. [2023-11-17 15:09:36,211 INFO L125 PetriNetUnfolderBase]: For 2452/2452 co-relation queries the response was YES. [2023-11-17 15:09:36,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138749 conditions, 70903 events. 49695/70903 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 2390. Compared 499952 event pairs, 19288 based on Foata normal form. 822/56856 useless extension candidates. Maximal degree in co-relation 66290. Up to 47694 conditions per place. [2023-11-17 15:09:36,708 INFO L140 encePairwiseOnDemand]: 494/513 looper letters, 206 selfloop transitions, 13 changer transitions 0/233 dead transitions. [2023-11-17 15:09:36,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 233 transitions, 953 flow [2023-11-17 15:09:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:09:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:09:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1329 transitions. [2023-11-17 15:09:36,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181286549707602 [2023-11-17 15:09:36,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1329 transitions. [2023-11-17 15:09:36,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1329 transitions. [2023-11-17 15:09:36,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:36,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1329 transitions. [2023-11-17 15:09:36,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:36,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:36,744 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:36,746 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 206 flow. Second operand 5 states and 1329 transitions. [2023-11-17 15:09:36,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 233 transitions, 953 flow [2023-11-17 15:09:36,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 233 transitions, 945 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:36,756 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 300 flow [2023-11-17 15:09:36,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2023-11-17 15:09:36,761 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2023-11-17 15:09:36,761 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 300 flow [2023-11-17 15:09:36,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:36,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:36,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:36,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:09:36,762 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 15:09:36,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash -66115269, now seen corresponding path program 1 times [2023-11-17 15:09:36,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:36,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177963056] [2023-11-17 15:09:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:36,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:36,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177963056] [2023-11-17 15:09:36,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177963056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:36,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:36,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:09:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427214030] [2023-11-17 15:09:36,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:36,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:36,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 513 [2023-11-17 15:09:36,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:36,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:36,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 513 [2023-11-17 15:09:36,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:43,928 INFO L124 PetriNetUnfolderBase]: 65889/91817 cut-off events. [2023-11-17 15:09:43,929 INFO L125 PetriNetUnfolderBase]: For 29909/30013 co-relation queries the response was YES. [2023-11-17 15:09:44,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202232 conditions, 91817 events. 65889/91817 cut-off events. For 29909/30013 co-relation queries the response was YES. Maximal size of possible extension queue 3525. Compared 655465 event pairs, 14031 based on Foata normal form. 1152/75834 useless extension candidates. Maximal degree in co-relation 104959. Up to 75041 conditions per place. [2023-11-17 15:09:44,616 INFO L140 encePairwiseOnDemand]: 506/513 looper letters, 113 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2023-11-17 15:09:44,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 674 flow [2023-11-17 15:09:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:09:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:09:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-11-17 15:09:44,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4964262508122157 [2023-11-17 15:09:44,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-11-17 15:09:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-11-17 15:09:44,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:44,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-11-17 15:09:44,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:44,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:44,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:44,626 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 300 flow. Second operand 3 states and 764 transitions. [2023-11-17 15:09:44,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 674 flow [2023-11-17 15:09:44,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 674 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:44,648 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 330 flow [2023-11-17 15:09:44,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2023-11-17 15:09:44,650 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 10 predicate places. [2023-11-17 15:09:44,650 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 330 flow [2023-11-17 15:09:44,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:44,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:44,651 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:09:44,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:09:44,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:09:44,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash -297812505, now seen corresponding path program 1 times [2023-11-17 15:09:44,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:44,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995301079] [2023-11-17 15:09:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:44,688 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:44,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:44,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:44,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:09:44,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:09:44,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:09:44,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:09:44,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:09:44,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:09:44,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:09:44,707 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:44,708 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:09:44,774 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:44,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:44,853 INFO L124 PetriNetUnfolderBase]: 41/405 cut-off events. [2023-11-17 15:09:44,854 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:44,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 405 events. 41/405 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1326 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 329. Up to 10 conditions per place. [2023-11-17 15:09:44,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:44,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:44,871 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:44,872 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:44,872 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:44,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:44,947 INFO L124 PetriNetUnfolderBase]: 41/405 cut-off events. [2023-11-17 15:09:44,948 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:44,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 405 events. 41/405 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1326 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 329. Up to 10 conditions per place. [2023-11-17 15:09:44,979 INFO L119 LiptonReduction]: Number of co-enabled transitions 84688 [2023-11-17 15:10:06,496 INFO L134 LiptonReduction]: Checked pairs total: 172070 [2023-11-17 15:10:06,496 INFO L136 LiptonReduction]: Total number of compositions: 310 [2023-11-17 15:10:06,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:06,499 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;@56e2cae0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:06,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:06,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:06,505 INFO L124 PetriNetUnfolderBase]: 7/55 cut-off events. [2023-11-17 15:10:06,506 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:10:06,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:06,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:06,506 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 15:10:06,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1914524313, now seen corresponding path program 1 times [2023-11-17 15:10:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:06,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082864871] [2023-11-17 15:10:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:06,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:10:06,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:06,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082864871] [2023-11-17 15:10:06,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082864871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:06,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:06,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388527269] [2023-11-17 15:10:06,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:06,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:06,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:06,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 665 [2023-11-17 15:10:06,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 122 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:06,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:06,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 665 [2023-11-17 15:10:06,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand