/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-1-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:08:10,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:08:10,893 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:08:10,937 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:08:10,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:08:10,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:08:10,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:08:10,939 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:08:10,940 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:08:10,944 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:08:10,944 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:08:10,945 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:08:10,945 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:08:10,946 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:08:10,946 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:08:10,946 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:08:10,947 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:08:10,947 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:08:10,947 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:08:10,947 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:08:10,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:08:10,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:08:10,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:08:10,949 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:08:10,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:08:10,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:10,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:08:10,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:08:10,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:08:10,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:08:10,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:08:10,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:08:10,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:08:11,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:08:11,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:08:11,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:08:11,227 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:08:11,228 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:08:11,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-1-pthread.i [2023-11-17 15:08:12,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:08:12,734 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:08:12,735 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-1-pthread.i [2023-11-17 15:08:12,749 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/701280424/680f7ff9974246a0955049e44eb7e0e8/FLAG9dbb8819a [2023-11-17 15:08:12,763 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/701280424/680f7ff9974246a0955049e44eb7e0e8 [2023-11-17 15:08:12,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:08:12,767 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:08:12,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:12,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:08:12,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:08:12,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:12" (1/1) ... [2023-11-17 15:08:12,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296c7f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:12, skipping insertion in model container [2023-11-17 15:08:12,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:12" (1/1) ... [2023-11-17 15:08:12,813 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:08:13,075 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-1-pthread.i[31356,31369] [2023-11-17 15:08:13,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:13,120 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:08:13,173 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-1-pthread.i[31356,31369] [2023-11-17 15:08:13,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:13,202 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:13,202 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:13,208 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:08:13,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13 WrapperNode [2023-11-17 15:08:13,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:13,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:13,209 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:08:13,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:08:13,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,251 INFO L138 Inliner]: procedures = 172, calls = 38, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 133 [2023-11-17 15:08:13,251 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:13,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:08:13,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:08:13,252 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:08:13,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,273 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,275 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,279 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:08:13,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:08:13,280 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:08:13,280 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:08:13,281 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (1/1) ... [2023-11-17 15:08:13,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:13,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:08:13,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:08:13,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:08:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:08:13,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:08:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:08:13,349 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:08:13,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:08:13,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:08:13,350 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:08:13,457 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:08:13,459 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:08:13,646 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:08:13,737 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:08:13,738 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:08:13,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:13 BoogieIcfgContainer [2023-11-17 15:08:13,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:08:13,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:08:13,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:08:13,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:08:13,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:08:12" (1/3) ... [2023-11-17 15:08:13,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdb75ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:13, skipping insertion in model container [2023-11-17 15:08:13,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:13" (2/3) ... [2023-11-17 15:08:13,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdb75ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:13, skipping insertion in model container [2023-11-17 15:08:13,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:13" (3/3) ... [2023-11-17 15:08:13,747 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-1-pthread.i [2023-11-17 15:08:13,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:08:13,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:08:13,767 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:08:13,844 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:13,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:13,952 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-11-17 15:08:13,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:13,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 9/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-17 15:08:13,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:13,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:13,971 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:13,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:13,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:13,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:14,015 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-11-17 15:08:14,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:14,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 9/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-17 15:08:14,019 INFO L119 LiptonReduction]: Number of co-enabled transitions 2044 [2023-11-17 15:08:18,978 INFO L134 LiptonReduction]: Checked pairs total: 1738 [2023-11-17 15:08:18,979 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-17 15:08:18,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:19,002 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;@6638a01d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:19,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:08:19,006 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:19,006 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:08:19,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:19,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:19,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:08:19,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:08:19,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash 548047968, now seen corresponding path program 1 times [2023-11-17 15:08:19,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396273502] [2023-11-17 15:08:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396273502] [2023-11-17 15:08:19,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396273502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:19,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:19,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:08:19,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302353871] [2023-11-17 15:08:19,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:19,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:08:19,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:08:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:08:19,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 236 [2023-11-17 15:08:19,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 11 transitions, 26 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:19,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:19,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 236 [2023-11-17 15:08:19,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:19,323 INFO L124 PetriNetUnfolderBase]: 7/21 cut-off events. [2023-11-17 15:08:19,323 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:19,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 21 events. 7/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 34 event pairs, 4 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-17 15:08:19,325 INFO L140 encePairwiseOnDemand]: 233/236 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-17 15:08:19,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 15:08:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:08:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:08:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 210 transitions. [2023-11-17 15:08:19,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449152542372881 [2023-11-17 15:08:19,341 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 210 transitions. [2023-11-17 15:08:19,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 210 transitions. [2023-11-17 15:08:19,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:19,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 210 transitions. [2023-11-17 15:08:19,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 105.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:19,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:19,357 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:19,359 INFO L175 Difference]: Start difference. First operand has 12 places, 11 transitions, 26 flow. Second operand 2 states and 210 transitions. [2023-11-17 15:08:19,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 15:08:19,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:08:19,363 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-17 15:08:19,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-11-17 15:08:19,369 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-17 15:08:19,370 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-17 15:08:19,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:19,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:19,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:08:19,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:08:19,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:08:19,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash -190470873, now seen corresponding path program 1 times [2023-11-17 15:08:19,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:19,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004375309] [2023-11-17 15:08:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:19,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:19,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:19,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:19,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:08:19,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:08:19,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:08:19,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:08:19,459 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:08:19,461 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:19,461 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:08:19,498 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:19,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:19,534 INFO L124 PetriNetUnfolderBase]: 17/213 cut-off events. [2023-11-17 15:08:19,534 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:19,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 213 events. 17/213 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 393 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 159. Up to 6 conditions per place. [2023-11-17 15:08:19,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:19,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:19,540 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:19,540 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:19,541 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:19,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:19,567 INFO L124 PetriNetUnfolderBase]: 17/213 cut-off events. [2023-11-17 15:08:19,567 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:19,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 213 events. 17/213 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 393 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 159. Up to 6 conditions per place. [2023-11-17 15:08:19,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 14892 [2023-11-17 15:08:24,395 INFO L134 LiptonReduction]: Checked pairs total: 26484 [2023-11-17 15:08:24,395 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-11-17 15:08:24,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:24,398 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;@6638a01d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:24,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:08:24,403 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:24,403 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-11-17 15:08:24,403 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:24,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:24,404 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:08:24,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:08:24,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1592788169, now seen corresponding path program 1 times [2023-11-17 15:08:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301328301] [2023-11-17 15:08:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:24,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:24,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:24,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:24,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:08:24,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:08:24,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:08:24,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:08:24,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:08:24,458 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:08:24,460 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:24,460 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:08:24,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:24,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:24,571 INFO L124 PetriNetUnfolderBase]: 25/300 cut-off events. [2023-11-17 15:08:24,572 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:08:24,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 300 events. 25/300 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 776 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 232. Up to 8 conditions per place. [2023-11-17 15:08:24,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:24,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:24,582 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:24,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:24,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:24,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:24,623 INFO L124 PetriNetUnfolderBase]: 25/300 cut-off events. [2023-11-17 15:08:24,624 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:08:24,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 300 events. 25/300 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 776 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 232. Up to 8 conditions per place. [2023-11-17 15:08:24,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 38544 [2023-11-17 15:08:30,479 INFO L134 LiptonReduction]: Checked pairs total: 70874 [2023-11-17 15:08:30,480 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-11-17 15:08:30,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:30,483 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;@6638a01d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:30,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:08:30,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:30,487 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-17 15:08:30,487 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:08:30,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:30,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:30,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:30,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash -28154382, now seen corresponding path program 1 times [2023-11-17 15:08:30,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:30,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159886181] [2023-11-17 15:08:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:30,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:30,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159886181] [2023-11-17 15:08:30,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159886181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:30,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:30,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:30,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115729346] [2023-11-17 15:08:30,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:30,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:30,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:30,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:30,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 494 [2023-11-17 15:08:30,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:30,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:30,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 494 [2023-11-17 15:08:30,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:33,724 INFO L124 PetriNetUnfolderBase]: 23321/34794 cut-off events. [2023-11-17 15:08:33,725 INFO L125 PetriNetUnfolderBase]: For 1624/1624 co-relation queries the response was YES. [2023-11-17 15:08:33,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66926 conditions, 34794 events. 23321/34794 cut-off events. For 1624/1624 co-relation queries the response was YES. Maximal size of possible extension queue 1529. Compared 248037 event pairs, 5509 based on Foata normal form. 216/27225 useless extension candidates. Maximal degree in co-relation 23244. Up to 27111 conditions per place. [2023-11-17 15:08:34,014 INFO L140 encePairwiseOnDemand]: 482/494 looper letters, 106 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2023-11-17 15:08:34,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 516 flow [2023-11-17 15:08:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-11-17 15:08:34,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114709851551957 [2023-11-17 15:08:34,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-11-17 15:08:34,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-11-17 15:08:34,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:34,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-11-17 15:08:34,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:34,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:34,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:34,035 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 180 flow. Second operand 3 states and 758 transitions. [2023-11-17 15:08:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 516 flow [2023-11-17 15:08:34,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 131 transitions, 512 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:08:34,042 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 218 flow [2023-11-17 15:08:34,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2023-11-17 15:08:34,044 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-11-17 15:08:34,044 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 218 flow [2023-11-17 15:08:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:34,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:34,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:34,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:08:34,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:34,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1970378508, now seen corresponding path program 1 times [2023-11-17 15:08:34,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953214190] [2023-11-17 15:08:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953214190] [2023-11-17 15:08:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953214190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:34,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:34,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53113009] [2023-11-17 15:08:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:34,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 494 [2023-11-17 15:08:34,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:34,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:34,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 494 [2023-11-17 15:08:34,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:38,345 INFO L124 PetriNetUnfolderBase]: 36618/53833 cut-off events. [2023-11-17 15:08:38,345 INFO L125 PetriNetUnfolderBase]: For 7376/7386 co-relation queries the response was YES. [2023-11-17 15:08:38,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109421 conditions, 53833 events. 36618/53833 cut-off events. For 7376/7386 co-relation queries the response was YES. Maximal size of possible extension queue 2740. Compared 411108 event pairs, 7488 based on Foata normal form. 766/42782 useless extension candidates. Maximal degree in co-relation 75087. Up to 40609 conditions per place. [2023-11-17 15:08:38,837 INFO L140 encePairwiseOnDemand]: 487/494 looper letters, 89 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2023-11-17 15:08:38,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 496 flow [2023-11-17 15:08:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-11-17 15:08:38,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851551956815115 [2023-11-17 15:08:38,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-11-17 15:08:38,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-11-17 15:08:38,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:38,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-11-17 15:08:38,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:38,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:38,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:38,849 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 218 flow. Second operand 3 states and 719 transitions. [2023-11-17 15:08:38,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 496 flow [2023-11-17 15:08:38,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:08:38,887 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 236 flow [2023-11-17 15:08:38,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2023-11-17 15:08:38,889 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2023-11-17 15:08:38,889 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 236 flow [2023-11-17 15:08:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:38,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:38,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:38,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:08:38,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:38,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash -826166008, now seen corresponding path program 1 times [2023-11-17 15:08:38,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:38,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109900686] [2023-11-17 15:08:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:38,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:39,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:39,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109900686] [2023-11-17 15:08:39,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109900686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:39,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:39,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:08:39,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204491799] [2023-11-17 15:08:39,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:39,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:08:39,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:39,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:08:39,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:08:39,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 494 [2023-11-17 15:08:39,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:39,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:39,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 494 [2023-11-17 15:08:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:44,351 INFO L124 PetriNetUnfolderBase]: 52287/74760 cut-off events. [2023-11-17 15:08:44,351 INFO L125 PetriNetUnfolderBase]: For 9029/9036 co-relation queries the response was YES. [2023-11-17 15:08:44,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158221 conditions, 74760 events. 52287/74760 cut-off events. For 9029/9036 co-relation queries the response was YES. Maximal size of possible extension queue 3485. Compared 566592 event pairs, 9912 based on Foata normal form. 0/59335 useless extension candidates. Maximal degree in co-relation 120238. Up to 45793 conditions per place. [2023-11-17 15:08:44,857 INFO L140 encePairwiseOnDemand]: 486/494 looper letters, 193 selfloop transitions, 9 changer transitions 0/222 dead transitions. [2023-11-17 15:08:44,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 222 transitions, 1002 flow [2023-11-17 15:08:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:08:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:08:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1369 transitions. [2023-11-17 15:08:44,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618758434547908 [2023-11-17 15:08:44,864 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1369 transitions. [2023-11-17 15:08:44,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1369 transitions. [2023-11-17 15:08:44,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:44,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1369 transitions. [2023-11-17 15:08:44,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 228.16666666666666) internal successors, (1369), 6 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:44,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 494.0) internal successors, (3458), 7 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:44,878 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 494.0) internal successors, (3458), 7 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:44,878 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 236 flow. Second operand 6 states and 1369 transitions. [2023-11-17 15:08:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 222 transitions, 1002 flow [2023-11-17 15:08:44,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 222 transitions, 996 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:08:44,887 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 282 flow [2023-11-17 15:08:44,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2023-11-17 15:08:44,889 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2023-11-17 15:08:44,889 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 282 flow [2023-11-17 15:08:44,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:44,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:44,890 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:08:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:08:44,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1380911436, now seen corresponding path program 1 times [2023-11-17 15:08:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555323695] [2023-11-17 15:08:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:44,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:44,934 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:44,934 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:44,934 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:08:44,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:08:44,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:08:44,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:08:44,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:08:44,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:08:44,935 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:08:44,936 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:44,936 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:08:44,987 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:44,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:45,068 INFO L124 PetriNetUnfolderBase]: 33/387 cut-off events. [2023-11-17 15:08:45,069 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:45,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 387 events. 33/387 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1221 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 308. Up to 10 conditions per place. [2023-11-17 15:08:45,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:45,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:45,079 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:45,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:45,079 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:45,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:45,318 INFO L124 PetriNetUnfolderBase]: 33/387 cut-off events. [2023-11-17 15:08:45,318 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:45,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 387 events. 33/387 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1221 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 308. Up to 10 conditions per place. [2023-11-17 15:08:45,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 73000 [2023-11-17 15:08:52,173 INFO L134 LiptonReduction]: Checked pairs total: 133650 [2023-11-17 15:08:52,173 INFO L136 LiptonReduction]: Total number of compositions: 299 [2023-11-17 15:08:52,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:52,176 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;@6638a01d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:52,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:08:52,179 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:52,179 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-17 15:08:52,179 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:08:52,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:52,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:52,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:08:52,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1361133701, now seen corresponding path program 1 times [2023-11-17 15:08:52,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:52,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002029121] [2023-11-17 15:08:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:52,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:52,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:52,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002029121] [2023-11-17 15:08:52,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002029121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:52,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:52,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:52,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600440966] [2023-11-17 15:08:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:52,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:52,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:52,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:52,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:52,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 636 [2023-11-17 15:08:52,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:52,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:52,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 636 [2023-11-17 15:08:52,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand