/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:22:04,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:22:04,324 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 11:22:04,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:22:04,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:22:04,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:22:04,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:22:04,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:22:04,356 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:22:04,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:22:04,359 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:22:04,359 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:22:04,359 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:22:04,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:22:04,362 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:22:04,363 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:22:04,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:22:04,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:22:04,364 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:22:04,364 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:22:04,364 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:22:04,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:22:04,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:22:04,365 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:22:04,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:22:04,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:04,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:22:04,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:22:04,367 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:22:04,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:22:04,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:22:04,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:22:04,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:22:04,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:22:04,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:22:04,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:22:04,561 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:22:04,562 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:22:04,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-17 11:22:05,590 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:22:05,806 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:22:05,808 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-17 11:22:05,822 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5262df23c/d45184598cce4c788b36f90a1f1a5b45/FLAG8572049ba [2023-11-17 11:22:05,836 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5262df23c/d45184598cce4c788b36f90a1f1a5b45 [2023-11-17 11:22:05,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:22:05,840 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:22:05,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:05,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:22:05,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:22:05,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:05" (1/1) ... [2023-11-17 11:22:05,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3d6425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:05, skipping insertion in model container [2023-11-17 11:22:05,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:05" (1/1) ... [2023-11-17 11:22:05,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:22:06,162 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/36_stack_cas_p0_vs_concur.i[30869,30882] [2023-11-17 11:22:06,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:06,175 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:22:06,217 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/36_stack_cas_p0_vs_concur.i[30869,30882] [2023-11-17 11:22:06,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:06,241 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:06,241 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:06,246 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:22:06,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06 WrapperNode [2023-11-17 11:22:06,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:06,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:06,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:22:06,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:22:06,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,283 INFO L138 Inliner]: procedures = 172, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 105 [2023-11-17 11:22:06,284 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:06,284 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:22:06,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:22:06,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:22:06,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,294 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,294 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,303 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:22:06,313 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:22:06,313 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:22:06,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:22:06,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:06,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:22:06,336 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 11:22:06,354 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 11:22:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:22:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:22:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:22:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:22:06,370 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 11:22:06,495 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:22:06,497 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:22:06,685 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:22:06,792 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:22:06,792 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 11:22:06,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:06 BoogieIcfgContainer [2023-11-17 11:22:06,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:22:06,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:22:06,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:22:06,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:22:06,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:22:05" (1/3) ... [2023-11-17 11:22:06,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7a5144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:06, skipping insertion in model container [2023-11-17 11:22:06,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06" (2/3) ... [2023-11-17 11:22:06,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7a5144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:06, skipping insertion in model container [2023-11-17 11:22:06,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:06" (3/3) ... [2023-11-17 11:22:06,801 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-11-17 11:22:06,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:22:06,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:22:06,814 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:22:06,846 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:06,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 23 transitions, 50 flow [2023-11-17 11:22:06,887 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-17 11:22:06,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:06,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 4/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 20. Up to 3 conditions per place. [2023-11-17 11:22:06,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 23 transitions, 50 flow [2023-11-17 11:22:06,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 23 transitions, 50 flow [2023-11-17 11:22:06,894 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:06,902 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 22 places, 23 transitions, 50 flow [2023-11-17 11:22:06,904 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 22 places, 23 transitions, 50 flow [2023-11-17 11:22:06,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 23 transitions, 50 flow [2023-11-17 11:22:06,932 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-17 11:22:06,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:06,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 4/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 20. Up to 3 conditions per place. [2023-11-17 11:22:06,933 INFO L119 LiptonReduction]: Number of co-enabled transitions 136 [2023-11-17 11:22:07,244 INFO L134 LiptonReduction]: Checked pairs total: 258 [2023-11-17 11:22:07,244 INFO L136 LiptonReduction]: Total number of compositions: 7 [2023-11-17 11:22:07,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:07,258 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;@2a47e3f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:07,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:22:07,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:07,261 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-11-17 11:22:07,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:07,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:07,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:22:07,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:07,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash 816497307, now seen corresponding path program 1 times [2023-11-17 11:22:07,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:07,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680438632] [2023-11-17 11:22:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:07,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:07,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:07,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:07,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:07,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:22:07,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:22:07,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:22:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:22:07,363 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:22:07,365 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:07,365 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:22:07,383 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:07,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 41 transitions, 92 flow [2023-11-17 11:22:07,393 INFO L124 PetriNetUnfolderBase]: 8/46 cut-off events. [2023-11-17 11:22:07,393 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:07,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 46 events. 8/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 87 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2023-11-17 11:22:07,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 41 transitions, 92 flow [2023-11-17 11:22:07,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 41 transitions, 92 flow [2023-11-17 11:22:07,394 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:07,395 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 41 transitions, 92 flow [2023-11-17 11:22:07,395 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 41 transitions, 92 flow [2023-11-17 11:22:07,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 41 transitions, 92 flow [2023-11-17 11:22:07,401 INFO L124 PetriNetUnfolderBase]: 8/46 cut-off events. [2023-11-17 11:22:07,401 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:07,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 46 events. 8/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 87 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2023-11-17 11:22:07,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 884 [2023-11-17 11:22:07,653 INFO L134 LiptonReduction]: Checked pairs total: 1474 [2023-11-17 11:22:07,653 INFO L136 LiptonReduction]: Total number of compositions: 10 [2023-11-17 11:22:07,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:07,660 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;@2a47e3f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:07,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:22:07,665 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:07,665 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2023-11-17 11:22:07,665 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:07,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:07,666 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:22:07,666 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 11:22:07,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:07,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2042574937, now seen corresponding path program 1 times [2023-11-17 11:22:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:07,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045020687] [2023-11-17 11:22:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:07,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:07,683 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:07,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:07,697 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:07,698 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:22:07,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:22:07,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:22:07,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:22:07,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:22:07,698 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:22:07,699 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:07,699 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:22:07,728 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:07,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 59 transitions, 136 flow [2023-11-17 11:22:07,744 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2023-11-17 11:22:07,744 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:07,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 12/67 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 159 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-11-17 11:22:07,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 59 transitions, 136 flow [2023-11-17 11:22:07,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 59 transitions, 136 flow [2023-11-17 11:22:07,747 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:07,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 59 transitions, 136 flow [2023-11-17 11:22:07,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 59 transitions, 136 flow [2023-11-17 11:22:07,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 59 transitions, 136 flow [2023-11-17 11:22:07,759 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2023-11-17 11:22:07,759 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:07,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 12/67 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 159 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-11-17 11:22:07,763 INFO L119 LiptonReduction]: Number of co-enabled transitions 2244 [2023-11-17 11:22:12,244 INFO L134 LiptonReduction]: Checked pairs total: 3831 [2023-11-17 11:22:12,244 INFO L136 LiptonReduction]: Total number of compositions: 15 [2023-11-17 11:22:12,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:12,246 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;@2a47e3f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:12,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:22:12,250 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:12,250 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-17 11:22:12,250 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:22:12,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:12,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:12,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:22:12,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash -505968589, now seen corresponding path program 1 times [2023-11-17 11:22:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:12,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074029501] [2023-11-17 11:22:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:12,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:12,332 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 11:22:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:12,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074029501] [2023-11-17 11:22:12,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074029501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:12,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:12,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:12,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658225023] [2023-11-17 11:22:12,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:12,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:22:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:22:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:22:12,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 74 [2023-11-17 11:22:12,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 118 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:12,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:12,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 74 [2023-11-17 11:22:12,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:13,799 INFO L124 PetriNetUnfolderBase]: 12531/16942 cut-off events. [2023-11-17 11:22:13,800 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2023-11-17 11:22:13,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34375 conditions, 16942 events. 12531/16942 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 79326 event pairs, 10215 based on Foata normal form. 0/14606 useless extension candidates. Maximal degree in co-relation 18475. Up to 16910 conditions per place. [2023-11-17 11:22:13,900 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-11-17 11:22:13,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 182 flow [2023-11-17 11:22:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:22:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:22:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 60 transitions. [2023-11-17 11:22:13,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40540540540540543 [2023-11-17 11:22:13,908 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 60 transitions. [2023-11-17 11:22:13,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 60 transitions. [2023-11-17 11:22:13,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:13,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 60 transitions. [2023-11-17 11:22:13,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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 11:22:13,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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 11:22:13,914 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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 11:22:13,915 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 118 flow. Second operand 2 states and 60 transitions. [2023-11-17 11:22:13,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 182 flow [2023-11-17 11:22:13,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:13,919 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 102 flow [2023-11-17 11:22:13,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-17 11:22:13,922 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-11-17 11:22:13,922 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 102 flow [2023-11-17 11:22:13,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:13,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:13,923 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:22:13,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:22:13,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:22:13,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1306797850, now seen corresponding path program 1 times [2023-11-17 11:22:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:13,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355936244] [2023-11-17 11:22:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:13,949 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:13,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:13,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:13,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:22:13,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:22:13,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:22:13,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:22:13,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:22:13,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:22:13,972 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:13,972 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:13,972 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:22:14,002 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:14,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 77 transitions, 182 flow [2023-11-17 11:22:14,011 INFO L124 PetriNetUnfolderBase]: 16/88 cut-off events. [2023-11-17 11:22:14,011 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:14,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 88 events. 16/88 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2023-11-17 11:22:14,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 77 transitions, 182 flow [2023-11-17 11:22:14,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 77 transitions, 182 flow [2023-11-17 11:22:14,013 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:14,013 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 77 transitions, 182 flow [2023-11-17 11:22:14,013 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 77 transitions, 182 flow [2023-11-17 11:22:14,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 77 transitions, 182 flow [2023-11-17 11:22:14,019 INFO L124 PetriNetUnfolderBase]: 16/88 cut-off events. [2023-11-17 11:22:14,019 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:14,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 88 events. 16/88 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2023-11-17 11:22:14,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 4216 [2023-11-17 11:22:16,496 INFO L134 LiptonReduction]: Checked pairs total: 7172 [2023-11-17 11:22:16,496 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 11:22:16,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:16,498 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;@2a47e3f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:16,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:22:16,500 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:16,500 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2023-11-17 11:22:16,500 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:22:16,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:16,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:16,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:16,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash -980010696, now seen corresponding path program 1 times [2023-11-17 11:22:16,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:16,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064952591] [2023-11-17 11:22:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:16,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:16,535 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 11:22:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064952591] [2023-11-17 11:22:16,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064952591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:16,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:16,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853100889] [2023-11-17 11:22:16,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:22:16,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:22:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:22:16,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 97 [2023-11-17 11:22:16,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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 11:22:16,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:16,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 97 [2023-11-17 11:22:16,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:31,749 INFO L124 PetriNetUnfolderBase]: 190555/239029 cut-off events. [2023-11-17 11:22:31,749 INFO L125 PetriNetUnfolderBase]: For 14933/14933 co-relation queries the response was YES. [2023-11-17 11:22:32,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484985 conditions, 239029 events. 190555/239029 cut-off events. For 14933/14933 co-relation queries the response was YES. Maximal size of possible extension queue 3630. Compared 1257812 event pairs, 156305 based on Foata normal form. 0/204613 useless extension candidates. Maximal degree in co-relation 92399. Up to 238777 conditions per place. [2023-11-17 11:22:33,351 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 51 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2023-11-17 11:22:33,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 242 flow [2023-11-17 11:22:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:22:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:22:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 78 transitions. [2023-11-17 11:22:33,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4020618556701031 [2023-11-17 11:22:33,353 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 78 transitions. [2023-11-17 11:22:33,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 78 transitions. [2023-11-17 11:22:33,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:33,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 78 transitions. [2023-11-17 11:22:33,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:33,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 11:22:33,355 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 11:22:33,355 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 158 flow. Second operand 2 states and 78 transitions. [2023-11-17 11:22:33,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 242 flow [2023-11-17 11:22:33,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 236 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:33,365 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 134 flow [2023-11-17 11:22:33,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-11-17 11:22:33,367 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2023-11-17 11:22:33,368 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 134 flow [2023-11-17 11:22:33,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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 11:22:33,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:33,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:33,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:22:33,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:33,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash 922364270, now seen corresponding path program 1 times [2023-11-17 11:22:33,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:33,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350770991] [2023-11-17 11:22:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:33,746 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 11:22:33,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:33,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350770991] [2023-11-17 11:22:33,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350770991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:33,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:33,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 11:22:33,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654295377] [2023-11-17 11:22:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 11:22:33,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 11:22:33,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:22:33,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 97 [2023-11-17 11:22:33,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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 11:22:33,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:33,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 97 [2023-11-17 11:22:33,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:56,259 INFO L124 PetriNetUnfolderBase]: 291314/367736 cut-off events. [2023-11-17 11:22:56,259 INFO L125 PetriNetUnfolderBase]: For 7611/7611 co-relation queries the response was YES. [2023-11-17 11:22:57,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742235 conditions, 367736 events. 291314/367736 cut-off events. For 7611/7611 co-relation queries the response was YES. Maximal size of possible extension queue 5479. Compared 2083678 event pairs, 56324 based on Foata normal form. 0/325489 useless extension candidates. Maximal degree in co-relation 742228. Up to 257570 conditions per place. [2023-11-17 11:22:58,521 INFO L140 encePairwiseOnDemand]: 74/97 looper letters, 183 selfloop transitions, 72 changer transitions 0/260 dead transitions. [2023-11-17 11:22:58,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 260 transitions, 1227 flow [2023-11-17 11:22:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:22:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:22:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 385 transitions. [2023-11-17 11:22:58,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28350515463917525 [2023-11-17 11:22:58,524 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 385 transitions. [2023-11-17 11:22:58,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 385 transitions. [2023-11-17 11:22:58,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:58,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 385 transitions. [2023-11-17 11:22:58,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 27.5) internal successors, (385), 14 states have internal predecessors, (385), 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 11:22:58,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 97.0) internal successors, (1455), 15 states have internal predecessors, (1455), 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 11:22:58,529 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 97.0) internal successors, (1455), 15 states have internal predecessors, (1455), 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 11:22:58,529 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 134 flow. Second operand 14 states and 385 transitions. [2023-11-17 11:22:58,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 260 transitions, 1227 flow [2023-11-17 11:22:58,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 260 transitions, 1227 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:58,541 INFO L231 Difference]: Finished difference. Result has 79 places, 132 transitions, 590 flow [2023-11-17 11:22:58,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=132} [2023-11-17 11:22:58,541 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2023-11-17 11:22:58,541 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 132 transitions, 590 flow [2023-11-17 11:22:58,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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 11:22:58,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:58,542 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:22:58,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:58,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1557915515, now seen corresponding path program 1 times [2023-11-17 11:22:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:58,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394240398] [2023-11-17 11:22:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:58,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:58,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:58,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:58,561 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:58,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:22:58,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:22:58,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:22:58,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:22:58,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:22:58,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:22:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:22:58,562 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:22:58,563 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:58,563 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:22:58,605 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:58,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 95 transitions, 230 flow [2023-11-17 11:22:58,614 INFO L124 PetriNetUnfolderBase]: 20/109 cut-off events. [2023-11-17 11:22:58,615 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:22:58,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 109 events. 20/109 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 312 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-11-17 11:22:58,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 95 transitions, 230 flow [2023-11-17 11:22:58,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 95 transitions, 230 flow [2023-11-17 11:22:58,616 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:58,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 95 transitions, 230 flow [2023-11-17 11:22:58,617 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 95 transitions, 230 flow [2023-11-17 11:22:58,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 95 transitions, 230 flow [2023-11-17 11:22:58,623 INFO L124 PetriNetUnfolderBase]: 20/109 cut-off events. [2023-11-17 11:22:58,623 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:22:58,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 109 events. 20/109 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 312 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-11-17 11:22:58,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 6800 [2023-11-17 11:23:01,204 INFO L134 LiptonReduction]: Checked pairs total: 11371 [2023-11-17 11:23:01,204 INFO L136 LiptonReduction]: Total number of compositions: 25 [2023-11-17 11:23:01,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:01,206 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;@2a47e3f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:01,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:23:01,208 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:01,208 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-17 11:23:01,208 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:23:01,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:01,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:01,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:23:01,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash -33569416, now seen corresponding path program 1 times [2023-11-17 11:23:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:01,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740507241] [2023-11-17 11:23:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:01,227 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 11:23:01,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:01,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740507241] [2023-11-17 11:23:01,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740507241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:01,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:01,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:01,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605693941] [2023-11-17 11:23:01,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:01,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:23:01,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:23:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:23:01,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 120 [2023-11-17 11:23:01,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 200 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:01,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 120 [2023-11-17 11:23:01,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand