/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/goblint-regression/28-race_reach_28-funptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:37:22,915 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:37:23,000 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 15:37:23,038 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:37:23,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:37:23,040 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:37:23,040 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:37:23,041 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:37:23,041 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:37:23,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:37:23,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:37:23,046 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:37:23,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:37:23,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:37:23,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:37:23,048 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:37:23,048 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:37:23,048 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:37:23,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:37:23,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:37:23,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:37:23,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:37:23,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:37:23,050 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:37:23,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:37:23,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:23,051 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:37:23,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:37:23,052 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:37:23,052 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:37:23,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:37:23,053 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:37:23,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:37:23,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:37:23,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:37:23,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:37:23,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:37:23,307 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:37:23,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-11-17 15:37:24,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:37:24,718 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:37:24,719 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-11-17 15:37:24,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2383a7ab/0097514481f84e75ba9680253a9c9614/FLAG8dee1dc75 [2023-11-17 15:37:24,760 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2383a7ab/0097514481f84e75ba9680253a9c9614 [2023-11-17 15:37:24,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:37:24,765 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:37:24,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:24,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:37:24,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:37:24,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:24" (1/1) ... [2023-11-17 15:37:24,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2673c50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:24, skipping insertion in model container [2023-11-17 15:37:24,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:24" (1/1) ... [2023-11-17 15:37:24,823 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:37:25,193 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2023-11-17 15:37:25,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:25,229 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:37:25,256 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2023-11-17 15:37:25,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:25,318 WARN L675 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:37:25,324 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:37:25,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25 WrapperNode [2023-11-17 15:37:25,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:25,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:25,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:37:25,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:37:25,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,393 INFO L138 Inliner]: procedures = 274, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 144 [2023-11-17 15:37:25,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:25,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:37:25,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:37:25,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:37:25,402 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,415 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,419 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,435 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:37:25,441 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:37:25,441 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:37:25,441 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:37:25,442 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (1/1) ... [2023-11-17 15:37:25,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:25,468 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 15:37:25,495 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 15:37:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:37:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:37:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:37:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:37:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:37:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:37:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:37:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:37:25,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:37:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:37:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:37:25,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:37:25,506 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 15:37:25,632 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:37:25,634 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:37:25,826 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:37:25,889 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:37:25,889 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:37:25,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:25 BoogieIcfgContainer [2023-11-17 15:37:25,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:37:25,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:37:25,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:37:25,913 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:37:25,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:37:24" (1/3) ... [2023-11-17 15:37:25,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f421e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:25, skipping insertion in model container [2023-11-17 15:37:25,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:25" (2/3) ... [2023-11-17 15:37:25,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f421e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:25, skipping insertion in model container [2023-11-17 15:37:25,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:25" (3/3) ... [2023-11-17 15:37:25,916 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2023-11-17 15:37:25,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:37:25,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:37:25,932 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:37:25,979 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:37:26,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 131 transitions, 269 flow [2023-11-17 15:37:26,066 INFO L124 PetriNetUnfolderBase]: 17/176 cut-off events. [2023-11-17 15:37:26,066 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:26,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 176 events. 17/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 439 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 91. Up to 4 conditions per place. [2023-11-17 15:37:26,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 131 transitions, 269 flow [2023-11-17 15:37:26,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 126 transitions, 256 flow [2023-11-17 15:37:26,079 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:26,089 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 126 transitions, 256 flow [2023-11-17 15:37:26,092 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 126 transitions, 256 flow [2023-11-17 15:37:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 126 transitions, 256 flow [2023-11-17 15:37:26,143 INFO L124 PetriNetUnfolderBase]: 16/171 cut-off events. [2023-11-17 15:37:26,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:26,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 171 events. 16/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 424 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 91. Up to 4 conditions per place. [2023-11-17 15:37:26,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 4182 [2023-11-17 15:37:29,431 INFO L134 LiptonReduction]: Checked pairs total: 6477 [2023-11-17 15:37:29,431 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-11-17 15:37:29,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:29,451 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21d5d49d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:29,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:29,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:29,457 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-17 15:37:29,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:29,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:29,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:37:29,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:29,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash -706192499, now seen corresponding path program 1 times [2023-11-17 15:37:29,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:29,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395437626] [2023-11-17 15:37:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:29,589 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:29,654 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:29,656 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:29,656 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:29,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:29,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:37:29,659 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:37:29,662 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:29,662 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:37:29,696 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:37:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 174 transitions, 364 flow [2023-11-17 15:37:29,781 INFO L124 PetriNetUnfolderBase]: 31/290 cut-off events. [2023-11-17 15:37:29,782 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 290 events. 31/290 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 942 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-17 15:37:29,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 174 transitions, 364 flow [2023-11-17 15:37:29,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 174 transitions, 364 flow [2023-11-17 15:37:29,789 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:29,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 174 transitions, 364 flow [2023-11-17 15:37:29,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 174 transitions, 364 flow [2023-11-17 15:37:29,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 174 transitions, 364 flow [2023-11-17 15:37:29,823 INFO L124 PetriNetUnfolderBase]: 31/290 cut-off events. [2023-11-17 15:37:29,823 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:29,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 290 events. 31/290 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 942 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-17 15:37:29,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 12628 [2023-11-17 15:37:33,353 INFO L134 LiptonReduction]: Checked pairs total: 25858 [2023-11-17 15:37:33,353 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-17 15:37:33,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:33,356 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;@21d5d49d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:33,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:33,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:33,359 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-17 15:37:33,359 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:33,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:33,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:33,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:33,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1665114231, now seen corresponding path program 1 times [2023-11-17 15:37:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:33,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729059398] [2023-11-17 15:37:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:33,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:33,486 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 15:37:33,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:33,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729059398] [2023-11-17 15:37:33,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729059398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:33,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:33,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25615265] [2023-11-17 15:37:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:33,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:33,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:33,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:33,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 321 [2023-11-17 15:37:33,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 15:37:33,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:33,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 321 [2023-11-17 15:37:33,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:34,026 INFO L124 PetriNetUnfolderBase]: 2863/5001 cut-off events. [2023-11-17 15:37:34,026 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-17 15:37:34,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9663 conditions, 5001 events. 2863/5001 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 31385 event pairs, 1340 based on Foata normal form. 313/4892 useless extension candidates. Maximal degree in co-relation 920. Up to 4592 conditions per place. [2023-11-17 15:37:34,049 INFO L140 encePairwiseOnDemand]: 304/321 looper letters, 39 selfloop transitions, 2 changer transitions 9/61 dead transitions. [2023-11-17 15:37:34,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 236 flow [2023-11-17 15:37:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-17 15:37:34,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44963655244029077 [2023-11-17 15:37:34,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-17 15:37:34,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-17 15:37:34,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:34,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-17 15:37:34,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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 15:37:34,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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 15:37:34,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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 15:37:34,077 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 144 flow. Second operand 3 states and 433 transitions. [2023-11-17 15:37:34,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 236 flow [2023-11-17 15:37:34,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:34,082 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 104 flow [2023-11-17 15:37:34,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-11-17 15:37:34,087 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-11-17 15:37:34,088 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 104 flow [2023-11-17 15:37:34,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 15:37:34,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:34,088 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:37:34,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:37:34,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:34,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:34,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1581779785, now seen corresponding path program 1 times [2023-11-17 15:37:34,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:34,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111043448] [2023-11-17 15:37:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:34,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:34,110 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:34,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:34,128 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:34,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:34,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:34,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:37:34,129 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:37:34,129 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:34,129 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:37:34,151 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:37:34,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 217 transitions, 461 flow [2023-11-17 15:37:34,208 INFO L124 PetriNetUnfolderBase]: 50/439 cut-off events. [2023-11-17 15:37:34,208 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:34,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 439 events. 50/439 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1639 event pairs, 1 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 298. Up to 16 conditions per place. [2023-11-17 15:37:34,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 217 transitions, 461 flow [2023-11-17 15:37:34,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 217 transitions, 461 flow [2023-11-17 15:37:34,216 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:34,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 217 transitions, 461 flow [2023-11-17 15:37:34,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 217 transitions, 461 flow [2023-11-17 15:37:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 217 transitions, 461 flow [2023-11-17 15:37:34,302 INFO L124 PetriNetUnfolderBase]: 50/439 cut-off events. [2023-11-17 15:37:34,302 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:34,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 439 events. 50/439 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1639 event pairs, 1 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 298. Up to 16 conditions per place. [2023-11-17 15:37:34,322 INFO L119 LiptonReduction]: Number of co-enabled transitions 24354 [2023-11-17 15:37:38,157 INFO L134 LiptonReduction]: Checked pairs total: 51354 [2023-11-17 15:37:38,158 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-11-17 15:37:38,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:38,161 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;@21d5d49d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:38,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:38,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:38,178 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-17 15:37:38,178 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:38,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:38,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:38,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:38,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1332223040, now seen corresponding path program 1 times [2023-11-17 15:37:38,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:38,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683327002] [2023-11-17 15:37:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:38,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:38,217 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 15:37:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683327002] [2023-11-17 15:37:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683327002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:38,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383245790] [2023-11-17 15:37:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:38,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2023-11-17 15:37:38,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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 15:37:38,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:38,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2023-11-17 15:37:38,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:45,924 INFO L124 PetriNetUnfolderBase]: 76659/113157 cut-off events. [2023-11-17 15:37:45,924 INFO L125 PetriNetUnfolderBase]: For 1961/1961 co-relation queries the response was YES. [2023-11-17 15:37:46,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220912 conditions, 113157 events. 76659/113157 cut-off events. For 1961/1961 co-relation queries the response was YES. Maximal size of possible extension queue 2152. Compared 828250 event pairs, 49331 based on Foata normal form. 6961/113087 useless extension candidates. Maximal degree in co-relation 14495. Up to 106488 conditions per place. [2023-11-17 15:37:46,598 INFO L140 encePairwiseOnDemand]: 375/398 looper letters, 59 selfloop transitions, 2 changer transitions 10/81 dead transitions. [2023-11-17 15:37:46,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 329 flow [2023-11-17 15:37:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-11-17 15:37:46,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45309882747068675 [2023-11-17 15:37:46,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-11-17 15:37:46,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-11-17 15:37:46,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:46,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-11-17 15:37:46,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 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 15:37:46,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 15:37:46,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 15:37:46,610 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 199 flow. Second operand 3 states and 541 transitions. [2023-11-17 15:37:46,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 329 flow [2023-11-17 15:37:46,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:46,619 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 142 flow [2023-11-17 15:37:46,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2023-11-17 15:37:46,621 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-11-17 15:37:46,621 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 142 flow [2023-11-17 15:37:46,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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 15:37:46,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:46,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:46,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:37:46,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:46,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1677233476, now seen corresponding path program 1 times [2023-11-17 15:37:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:46,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190763182] [2023-11-17 15:37:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:46,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:46,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:46,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190763182] [2023-11-17 15:37:46,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190763182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487981792] [2023-11-17 15:37:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:46,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:46,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:46,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:37:46,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:37:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:46,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:46,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:46,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:46,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487981792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:46,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:46,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:46,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785084179] [2023-11-17 15:37:46,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:46,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2023-11-17 15:37:46,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 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 15:37:46,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:46,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2023-11-17 15:37:46,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:48,392 INFO L124 PetriNetUnfolderBase]: 14392/23230 cut-off events. [2023-11-17 15:37:48,392 INFO L125 PetriNetUnfolderBase]: For 8092/8092 co-relation queries the response was YES. [2023-11-17 15:37:48,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46482 conditions, 23230 events. 14392/23230 cut-off events. For 8092/8092 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 166388 event pairs, 0 based on Foata normal form. 2030/25259 useless extension candidates. Maximal degree in co-relation 3376. Up to 13876 conditions per place. [2023-11-17 15:37:48,531 INFO L140 encePairwiseOnDemand]: 395/398 looper letters, 112 selfloop transitions, 4 changer transitions 0/126 dead transitions. [2023-11-17 15:37:48,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 126 transitions, 512 flow [2023-11-17 15:37:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:37:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:37:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1007 transitions. [2023-11-17 15:37:48,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42169179229480735 [2023-11-17 15:37:48,535 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1007 transitions. [2023-11-17 15:37:48,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1007 transitions. [2023-11-17 15:37:48,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:48,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1007 transitions. [2023-11-17 15:37:48,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.83333333333334) internal successors, (1007), 6 states have internal predecessors, (1007), 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 15:37:48,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 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 15:37:48,543 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 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 15:37:48,544 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 142 flow. Second operand 6 states and 1007 transitions. [2023-11-17 15:37:48,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 126 transitions, 512 flow [2023-11-17 15:37:48,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 126 transitions, 508 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:37:48,554 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 136 flow [2023-11-17 15:37:48,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2023-11-17 15:37:48,555 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -6 predicate places. [2023-11-17 15:37:48,556 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 136 flow [2023-11-17 15:37:48,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 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 15:37:48,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:48,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:37:48,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:37:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:48,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:48,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:48,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1310210839, now seen corresponding path program 1 times [2023-11-17 15:37:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:48,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420168881] [2023-11-17 15:37:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:48,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:48,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:48,829 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:48,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:48,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:48,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:37:48,830 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:48,831 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:48,831 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:37:48,870 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:37:48,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 260 transitions, 560 flow [2023-11-17 15:37:48,966 INFO L124 PetriNetUnfolderBase]: 81/660 cut-off events. [2023-11-17 15:37:48,966 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:48,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 660 events. 81/660 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2748 event pairs, 6 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 459. Up to 32 conditions per place. [2023-11-17 15:37:48,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 260 transitions, 560 flow [2023-11-17 15:37:48,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 260 transitions, 560 flow [2023-11-17 15:37:48,980 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:48,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 260 transitions, 560 flow [2023-11-17 15:37:48,980 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 260 transitions, 560 flow [2023-11-17 15:37:48,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 260 transitions, 560 flow [2023-11-17 15:37:49,068 INFO L124 PetriNetUnfolderBase]: 81/660 cut-off events. [2023-11-17 15:37:49,068 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:49,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 660 events. 81/660 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2748 event pairs, 6 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 459. Up to 32 conditions per place. [2023-11-17 15:37:49,100 INFO L119 LiptonReduction]: Number of co-enabled transitions 39688 [2023-11-17 15:37:53,413 INFO L134 LiptonReduction]: Checked pairs total: 86926 [2023-11-17 15:37:53,413 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-11-17 15:37:53,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:53,423 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;@21d5d49d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:53,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:53,426 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:53,426 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-17 15:37:53,426 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:53,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:53,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:53,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:53,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1727892435, now seen corresponding path program 1 times [2023-11-17 15:37:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:53,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587767286] [2023-11-17 15:37:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:53,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:53,474 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 15:37:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:53,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587767286] [2023-11-17 15:37:53,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587767286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:53,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:53,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248010874] [2023-11-17 15:37:53,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:53,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:53,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 472 [2023-11-17 15:37:53,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 15:37:53,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:53,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 472 [2023-11-17 15:37:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand