/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-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:31:17,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:31:17,109 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 11:31:17,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:31:17,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:31:17,147 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:31:17,147 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:31:17,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:31:17,148 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:31:17,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:31:17,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:31:17,149 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:31:17,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:31:17,152 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:31:17,152 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:31:17,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:31:17,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:31:17,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:31:17,154 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:31:17,154 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:31:17,154 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:31:17,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:31:17,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:31:17,156 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:31:17,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:31:17,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:31:17,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:31:17,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:31:17,157 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:31:17,157 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:31:17,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:31:17,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:31:17,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:31:17,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:31:17,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:31:17,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:31:17,424 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:31:17,425 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:31:17,425 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-11-17 11:31:18,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:31:18,966 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:31:18,967 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-11-17 11:31:18,989 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acc08e193/7316624ff9404340ae158afdbb5813f9/FLAG2f7ca2129 [2023-11-17 11:31:19,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acc08e193/7316624ff9404340ae158afdbb5813f9 [2023-11-17 11:31:19,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:31:19,004 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:31:19,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:31:19,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:31:19,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:31:19,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:19,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f775b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19, skipping insertion in model container [2023-11-17 11:31:19,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:19,074 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:31:19,705 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-complex/safestack_relacy.i[78860,78873] [2023-11-17 11:31:19,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:31:19,727 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:31:19,789 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-complex/safestack_relacy.i[78860,78873] [2023-11-17 11:31:19,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:31:19,905 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:31:19,905 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:31:19,912 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:31:19,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19 WrapperNode [2023-11-17 11:31:19,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:31:19,913 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:31:19,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:31:19,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:31:19,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:19,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:19,996 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 285 [2023-11-17 11:31:19,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:31:19,998 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:31:19,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:31:19,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:31:20,007 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,012 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,012 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:31:20,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:31:20,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:31:20,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:31:20,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (1/1) ... [2023-11-17 11:31:20,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:31:20,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:31:20,110 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 11:31:20,112 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 11:31:20,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:31:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:31:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:31:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:31:20,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:31:20,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-11-17 11:31:20,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-11-17 11:31:20,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:31:20,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:31:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:31:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:31:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:31:20,138 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 11:31:20,391 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:31:20,393 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:31:20,773 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:31:21,045 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:31:21,045 INFO L307 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-17 11:31:21,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:31:21 BoogieIcfgContainer [2023-11-17 11:31:21,048 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:31:21,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:31:21,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:31:21,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:31:21,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:31:19" (1/3) ... [2023-11-17 11:31:21,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6583d54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:31:21, skipping insertion in model container [2023-11-17 11:31:21,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:19" (2/3) ... [2023-11-17 11:31:21,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6583d54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:31:21, skipping insertion in model container [2023-11-17 11:31:21,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:31:21" (3/3) ... [2023-11-17 11:31:21,056 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-11-17 11:31:21,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:31:21,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:31:21,074 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:31:21,147 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:31:21,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 133 flow [2023-11-17 11:31:21,225 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2023-11-17 11:31:21,225 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:31:21,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 67 events. 12/67 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 128 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 48. Up to 3 conditions per place. [2023-11-17 11:31:21,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 133 flow [2023-11-17 11:31:21,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 61 transitions, 126 flow [2023-11-17 11:31:21,247 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:31:21,262 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 61 transitions, 126 flow [2023-11-17 11:31:21,267 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 61 transitions, 126 flow [2023-11-17 11:31:21,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 61 transitions, 126 flow [2023-11-17 11:31:21,289 INFO L124 PetriNetUnfolderBase]: 11/65 cut-off events. [2023-11-17 11:31:21,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:31:21,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 11/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-11-17 11:31:21,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 516 [2023-11-17 11:31:24,924 INFO L134 LiptonReduction]: Checked pairs total: 974 [2023-11-17 11:31:24,924 INFO L136 LiptonReduction]: Total number of compositions: 41 [2023-11-17 11:31:24,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:31:24,951 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;@bb117fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:31:24,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:31:24,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:31:24,957 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-11-17 11:31:24,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:31:24,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:24,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-17 11:31:24,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:31:24,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:24,964 INFO L85 PathProgramCache]: Analyzing trace with hash -285945770, now seen corresponding path program 1 times [2023-11-17 11:31:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:24,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396451551] [2023-11-17 11:31:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:24,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:25,353 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 11:31:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396451551] [2023-11-17 11:31:25,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396451551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:31:25,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:31:25,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:31:25,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827685300] [2023-11-17 11:31:25,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:31:25,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:31:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:31:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:31:25,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 104 [2023-11-17 11:31:25,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 11:31:25,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:25,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 104 [2023-11-17 11:31:25,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:25,479 INFO L124 PetriNetUnfolderBase]: 73/147 cut-off events. [2023-11-17 11:31:25,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:31:25,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 147 events. 73/147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 389 event pairs, 48 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 142 conditions per place. [2023-11-17 11:31:25,481 INFO L140 encePairwiseOnDemand]: 98/104 looper letters, 27 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-17 11:31:25,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 124 flow [2023-11-17 11:31:25,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:31:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:31:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-17 11:31:25,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.17307692307692307 [2023-11-17 11:31:25,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-17 11:31:25,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-17 11:31:25,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:25,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-17 11:31:25,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:25,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 11:31:25,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 11:31:25,501 INFO L175 Difference]: Start difference. First operand has 27 places, 33 transitions, 70 flow. Second operand 3 states and 54 transitions. [2023-11-17 11:31:25,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 124 flow [2023-11-17 11:31:25,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:31:25,505 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 76 flow [2023-11-17 11:31:25,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, 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=76, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-11-17 11:31:25,509 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-17 11:31:25,509 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 76 flow [2023-11-17 11:31:25,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 11:31:25,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:25,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:31:25,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:31:25,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:31:25,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1196457154, now seen corresponding path program 1 times [2023-11-17 11:31:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:25,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368713095] [2023-11-17 11:31:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:31:25,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:25,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368713095] [2023-11-17 11:31:25,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368713095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:31:25,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880846487] [2023-11-17 11:31:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:31:25,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:31:25,605 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 11:31:25,629 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 11:31:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:25,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:31:25,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:31:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:31:25,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:31:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:31:25,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880846487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:31:25,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:31:25,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-17 11:31:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505046510] [2023-11-17 11:31:25,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:31:25,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:31:25,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:31:25,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-17 11:31:25,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 104 [2023-11-17 11:31:25,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 11:31:25,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:25,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 104 [2023-11-17 11:31:25,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:25,910 INFO L124 PetriNetUnfolderBase]: 73/148 cut-off events. [2023-11-17 11:31:25,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:31:25,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 148 events. 73/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 389 event pairs, 48 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 292. Up to 142 conditions per place. [2023-11-17 11:31:25,913 INFO L140 encePairwiseOnDemand]: 101/104 looper letters, 27 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-17 11:31:25,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 32 transitions, 140 flow [2023-11-17 11:31:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:31:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:31:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2023-11-17 11:31:25,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14182692307692307 [2023-11-17 11:31:25,917 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 59 transitions. [2023-11-17 11:31:25,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 59 transitions. [2023-11-17 11:31:25,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:25,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 59 transitions. [2023-11-17 11:31:25,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 11:31:25,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 11:31:25,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 11:31:25,922 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 76 flow. Second operand 4 states and 59 transitions. [2023-11-17 11:31:25,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 32 transitions, 140 flow [2023-11-17 11:31:25,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:31:25,928 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 88 flow [2023-11-17 11:31:25,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2023-11-17 11:31:25,933 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-11-17 11:31:25,934 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 88 flow [2023-11-17 11:31:25,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 11:31:25,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:25,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-17 11:31:25,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:31:26,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:31:26,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:31:26,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:26,142 INFO L85 PathProgramCache]: Analyzing trace with hash -93692458, now seen corresponding path program 2 times [2023-11-17 11:31:26,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:26,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871600068] [2023-11-17 11:31:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:26,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:31:26,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:31:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:31:26,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:31:26,233 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:31:26,234 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:31:26,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:31:26,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:31:26,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:31:26,236 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-17 11:31:26,238 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:31:26,238 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:31:26,314 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:31:26,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 108 transitions, 232 flow [2023-11-17 11:31:26,332 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2023-11-17 11:31:26,332 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:31:26,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 123 events. 24/123 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 414 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2023-11-17 11:31:26,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 108 transitions, 232 flow [2023-11-17 11:31:26,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 108 transitions, 232 flow [2023-11-17 11:31:26,335 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:31:26,335 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 108 transitions, 232 flow [2023-11-17 11:31:26,335 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 108 transitions, 232 flow [2023-11-17 11:31:26,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 108 transitions, 232 flow [2023-11-17 11:31:26,347 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2023-11-17 11:31:26,347 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:31:26,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 123 events. 24/123 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 414 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2023-11-17 11:31:26,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 5160 [2023-11-17 11:31:30,804 INFO L134 LiptonReduction]: Checked pairs total: 12875 [2023-11-17 11:31:30,804 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-11-17 11:31:30,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:31:30,815 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;@bb117fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:31:30,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:31:30,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:31:30,818 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-17 11:31:30,818 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:31:30,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:30,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:31:30,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:31:30,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash -494882682, now seen corresponding path program 1 times [2023-11-17 11:31:30,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:30,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526515356] [2023-11-17 11:31:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:30,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:30,926 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 11:31:30,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526515356] [2023-11-17 11:31:30,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526515356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:31:30,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:31:30,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:31:30,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598074822] [2023-11-17 11:31:30,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:31:30,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:31:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:30,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:31:30,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:31:30,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 176 [2023-11-17 11:31:30,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 68 transitions, 152 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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 11:31:30,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:30,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 176 [2023-11-17 11:31:30,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:31,789 INFO L124 PetriNetUnfolderBase]: 5739/8370 cut-off events. [2023-11-17 11:31:31,789 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2023-11-17 11:31:31,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16753 conditions, 8370 events. 5739/8370 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 41223 event pairs, 4370 based on Foata normal form. 0/6001 useless extension candidates. Maximal degree in co-relation 13529. Up to 8276 conditions per place. [2023-11-17 11:31:31,835 INFO L140 encePairwiseOnDemand]: 172/176 looper letters, 61 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2023-11-17 11:31:31,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 266 flow [2023-11-17 11:31:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:31:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:31:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 91 transitions. [2023-11-17 11:31:31,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2585227272727273 [2023-11-17 11:31:31,839 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 91 transitions. [2023-11-17 11:31:31,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 91 transitions. [2023-11-17 11:31:31,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:31,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 91 transitions. [2023-11-17 11:31:31,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 45.5) internal successors, (91), 2 states have internal predecessors, (91), 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 11:31:31,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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 11:31:31,842 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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 11:31:31,842 INFO L175 Difference]: Start difference. First operand has 54 places, 68 transitions, 152 flow. Second operand 2 states and 91 transitions. [2023-11-17 11:31:31,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 266 flow [2023-11-17 11:31:31,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:31:31,846 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 144 flow [2023-11-17 11:31:31,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2023-11-17 11:31:31,848 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-11-17 11:31:31,848 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 144 flow [2023-11-17 11:31:31,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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 11:31:31,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:31,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-11-17 11:31:31,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:31:31,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:31:31,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 32617683, now seen corresponding path program 1 times [2023-11-17 11:31:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:31,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670822839] [2023-11-17 11:31:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:31,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:31,960 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 11:31:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670822839] [2023-11-17 11:31:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670822839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:31:31,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:31:31,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:31:31,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030027847] [2023-11-17 11:31:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:31:31,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:31:31,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:31:31,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:31:31,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 176 [2023-11-17 11:31:31,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:31,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:31,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 176 [2023-11-17 11:31:31,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:32,772 INFO L124 PetriNetUnfolderBase]: 5739/8371 cut-off events. [2023-11-17 11:31:32,772 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2023-11-17 11:31:32,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16756 conditions, 8371 events. 5739/8371 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 41229 event pairs, 4370 based on Foata normal form. 0/6002 useless extension candidates. Maximal degree in co-relation 16751. Up to 8276 conditions per place. [2023-11-17 11:31:32,815 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 60 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-17 11:31:32,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 270 flow [2023-11-17 11:31:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:31:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:31:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-17 11:31:32,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19318181818181818 [2023-11-17 11:31:32,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-17 11:31:32,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-17 11:31:32,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:32,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-17 11:31:32,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 11:31:32,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 11:31:32,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 11:31:32,820 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 144 flow. Second operand 3 states and 102 transitions. [2023-11-17 11:31:32,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 270 flow [2023-11-17 11:31:32,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:31:32,822 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 156 flow [2023-11-17 11:31:32,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2023-11-17 11:31:32,823 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-11-17 11:31:32,823 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 156 flow [2023-11-17 11:31:32,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:32,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:32,823 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:31:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:31:32,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:31:32,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:32,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1049421085, now seen corresponding path program 1 times [2023-11-17 11:31:32,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:32,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012677693] [2023-11-17 11:31:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:32,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:31:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012677693] [2023-11-17 11:31:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012677693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:31:32,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382673611] [2023-11-17 11:31:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:32,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:31:32,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:31:32,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:31:32,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:31:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:33,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:31:33,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:31:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:31:33,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:31:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:31:33,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382673611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:31:33,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:31:33,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:31:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853347422] [2023-11-17 11:31:33,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:31:33,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:31:33,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:31:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:31:33,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 176 [2023-11-17 11:31:33,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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 11:31:33,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:33,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 176 [2023-11-17 11:31:33,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:33,939 INFO L124 PetriNetUnfolderBase]: 5739/8372 cut-off events. [2023-11-17 11:31:33,939 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2023-11-17 11:31:33,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16766 conditions, 8372 events. 5739/8372 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 41244 event pairs, 4370 based on Foata normal form. 0/6003 useless extension candidates. Maximal degree in co-relation 16759. Up to 8276 conditions per place. [2023-11-17 11:31:33,981 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 60 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-11-17 11:31:33,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 286 flow [2023-11-17 11:31:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:31:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:31:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-17 11:31:33,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16477272727272727 [2023-11-17 11:31:33,984 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-17 11:31:33,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-17 11:31:33,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:33,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-17 11:31:33,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 11:31:33,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 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 11:31:33,987 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 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 11:31:33,988 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 156 flow. Second operand 4 states and 116 transitions. [2023-11-17 11:31:33,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 286 flow [2023-11-17 11:31:33,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:31:33,992 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 168 flow [2023-11-17 11:31:33,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-11-17 11:31:33,994 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2023-11-17 11:31:33,994 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 168 flow [2023-11-17 11:31:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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 11:31:33,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:33,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-11-17 11:31:34,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:31:34,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 11:31:34,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:31:34,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash -232884525, now seen corresponding path program 2 times [2023-11-17 11:31:34,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:34,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752952118] [2023-11-17 11:31:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:34,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:31:34,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:31:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:31:34,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:31:34,259 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:31:34,259 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:31:34,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:31:34,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:31:34,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:31:34,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:31:34,260 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-11-17 11:31:34,261 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:31:34,261 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:31:34,327 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:31:34,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 153 transitions, 333 flow [2023-11-17 11:31:34,355 INFO L124 PetriNetUnfolderBase]: 39/190 cut-off events. [2023-11-17 11:31:34,356 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:31:34,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 39/190 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 775 event pairs, 1 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 151. Up to 12 conditions per place. [2023-11-17 11:31:34,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 153 transitions, 333 flow [2023-11-17 11:31:34,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 153 transitions, 333 flow [2023-11-17 11:31:34,376 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:31:34,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 153 transitions, 333 flow [2023-11-17 11:31:34,376 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 153 transitions, 333 flow [2023-11-17 11:31:34,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 153 transitions, 333 flow [2023-11-17 11:31:34,398 INFO L124 PetriNetUnfolderBase]: 39/190 cut-off events. [2023-11-17 11:31:34,399 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:31:34,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 39/190 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 775 event pairs, 1 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 151. Up to 12 conditions per place. [2023-11-17 11:31:34,407 INFO L119 LiptonReduction]: Number of co-enabled transitions 13674 [2023-11-17 11:31:39,402 INFO L134 LiptonReduction]: Checked pairs total: 33231 [2023-11-17 11:31:39,403 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-11-17 11:31:39,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:31:39,405 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;@bb117fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:31:39,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:31:39,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:31:39,408 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-17 11:31:39,408 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:31:39,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:39,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:31:39,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:31:39,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1398804369, now seen corresponding path program 1 times [2023-11-17 11:31:39,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:39,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587429521] [2023-11-17 11:31:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:39,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:39,468 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 11:31:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587429521] [2023-11-17 11:31:39,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587429521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:31:39,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:31:39,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:31:39,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780245315] [2023-11-17 11:31:39,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:31:39,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:31:39,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:39,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:31:39,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:31:39,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 250 [2023-11-17 11:31:39,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 11:31:39,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:39,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 250 [2023-11-17 11:31:39,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:57,713 INFO L124 PetriNetUnfolderBase]: 190127/247098 cut-off events. [2023-11-17 11:31:57,713 INFO L125 PetriNetUnfolderBase]: For 6464/6464 co-relation queries the response was YES. [2023-11-17 11:31:58,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495466 conditions, 247098 events. 190127/247098 cut-off events. For 6464/6464 co-relation queries the response was YES. Maximal size of possible extension queue 4314. Compared 1431931 event pairs, 147502 based on Foata normal form. 0/180157 useless extension candidates. Maximal degree in co-relation 131669. Up to 245253 conditions per place. [2023-11-17 11:31:59,088 INFO L140 encePairwiseOnDemand]: 241/250 looper letters, 87 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-17 11:31:59,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 391 flow [2023-11-17 11:31:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:31:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:31:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-17 11:31:59,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.204 [2023-11-17 11:31:59,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-17 11:31:59,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-17 11:31:59,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:59,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-17 11:31:59,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 11:31:59,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 11:31:59,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 11:31:59,093 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 223 flow. Second operand 3 states and 153 transitions. [2023-11-17 11:31:59,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 391 flow [2023-11-17 11:31:59,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 93 transitions, 391 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:31:59,097 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 223 flow [2023-11-17 11:31:59,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2023-11-17 11:31:59,098 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2023-11-17 11:31:59,098 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 223 flow [2023-11-17 11:31:59,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 11:31:59,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:59,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:31:59,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:31:59,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:31:59,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1033288651, now seen corresponding path program 1 times [2023-11-17 11:31:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:59,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649962836] [2023-11-17 11:31:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:59,166 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 11:31:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649962836] [2023-11-17 11:31:59,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649962836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:31:59,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:31:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:31:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765573100] [2023-11-17 11:31:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:31:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:31:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:31:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:31:59,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 250 [2023-11-17 11:31:59,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:59,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:59,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 250 [2023-11-17 11:31:59,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:32:25,238 INFO L124 PetriNetUnfolderBase]: 291016/376876 cut-off events. [2023-11-17 11:32:25,238 INFO L125 PetriNetUnfolderBase]: For 9267/9267 co-relation queries the response was YES. [2023-11-17 11:32:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757034 conditions, 376876 events. 291016/376876 cut-off events. For 9267/9267 co-relation queries the response was YES. Maximal size of possible extension queue 5550. Compared 2275329 event pairs, 147502 based on Foata normal form. 0/273379 useless extension candidates. Maximal degree in co-relation 757020. Up to 245254 conditions per place. [2023-11-17 11:32:27,071 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 159 selfloop transitions, 3 changer transitions 0/165 dead transitions. [2023-11-17 11:32:27,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 165 transitions, 709 flow [2023-11-17 11:32:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:32:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:32:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-17 11:32:27,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.284 [2023-11-17 11:32:27,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-17 11:32:27,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-17 11:32:27,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:32:27,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-17 11:32:27,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:32:27,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 11:32:27,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 11:32:27,075 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 223 flow. Second operand 3 states and 213 transitions. [2023-11-17 11:32:27,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 165 transitions, 709 flow [2023-11-17 11:32:27,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 165 transitions, 705 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:32:27,082 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 245 flow [2023-11-17 11:32:27,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2023-11-17 11:32:27,083 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2023-11-17 11:32:27,083 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 245 flow [2023-11-17 11:32:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:32:27,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:32:27,083 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:32:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:32:27,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:32:27,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:32:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1403892465, now seen corresponding path program 1 times [2023-11-17 11:32:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:32:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436597982] [2023-11-17 11:32:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:32:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:32:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:32:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:32:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:32:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436597982] [2023-11-17 11:32:27,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436597982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:32:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168994464] [2023-11-17 11:32:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:32:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:32:27,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:32:27,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:32:27,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:32:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:32:27,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:32:27,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:32:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:32:27,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:32:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:32:27,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168994464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:32:27,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:32:27,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-17 11:32:27,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965906500] [2023-11-17 11:32:27,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:32:27,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:32:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:32:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:32:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:32:27,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 250 [2023-11-17 11:32:27,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 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 11:32:27,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:32:27,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 250 [2023-11-17 11:32:27,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand