/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/goblint-regression/28-race_reach_27-funptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:39:09,597 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:39:09,637 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 11:39:09,653 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:39:09,653 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:39:09,654 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:39:09,654 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:39:09,654 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:39:09,654 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:39:09,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:39:09,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:39:09,655 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:39:09,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:39:09,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:39:09,656 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:39:09,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:39:09,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:39:09,657 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:39:09,657 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:39:09,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:39:09,658 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:39:09,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:39:09,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:39:09,659 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:39:09,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:39:09,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:39:09,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:39:09,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:39:09,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:39:09,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:39:09,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:39:09,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:39:09,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:39:09,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:39:09,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:39:09,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:39:09,865 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:39:09,865 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:39:09,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-17 11:39:10,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:39:11,142 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:39:11,148 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-17 11:39:11,160 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b412634/04b5a9c782f941fdb7e9eba10a332d1d/FLAGf3480dd49 [2023-11-17 11:39:11,172 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b412634/04b5a9c782f941fdb7e9eba10a332d1d [2023-11-17 11:39:11,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:39:11,176 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:39:11,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:39:11,179 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:39:11,182 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:39:11,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1a28c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11, skipping insertion in model container [2023-11-17 11:39:11,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:39:11,515 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_27-funptr_racing.i[41323,41336] [2023-11-17 11:39:11,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:39:11,550 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:39:11,580 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_27-funptr_racing.i[41323,41336] [2023-11-17 11:39:11,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:39:11,637 WARN L675 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:39:11,642 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:39:11,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11 WrapperNode [2023-11-17 11:39:11,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:39:11,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:39:11,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:39:11,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:39:11,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,674 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,697 INFO L138 Inliner]: procedures = 274, calls = 52, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 176 [2023-11-17 11:39:11,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:39:11,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:39:11,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:39:11,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:39:11,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,714 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,736 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:39:11,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:39:11,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:39:11,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:39:11,737 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (1/1) ... [2023-11-17 11:39:11,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:39:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:11,779 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 11:39:11,803 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 11:39:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:39:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:39:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:39:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:39:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:39:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:39:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:39:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:39:11,813 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:39:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:39:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:39:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:39:11,815 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 11:39:11,906 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:39:11,907 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:39:12,083 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:39:12,299 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:39:12,299 INFO L307 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-17 11:39:12,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:39:12 BoogieIcfgContainer [2023-11-17 11:39:12,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:39:12,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:39:12,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:39:12,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:39:12,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:39:11" (1/3) ... [2023-11-17 11:39:12,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c79891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:39:12, skipping insertion in model container [2023-11-17 11:39:12,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:11" (2/3) ... [2023-11-17 11:39:12,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c79891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:39:12, skipping insertion in model container [2023-11-17 11:39:12,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:39:12" (3/3) ... [2023-11-17 11:39:12,306 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-11-17 11:39:12,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:39:12,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:39:12,318 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:39:12,360 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:39:12,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 79 transitions, 165 flow [2023-11-17 11:39:12,430 INFO L124 PetriNetUnfolderBase]: 20/103 cut-off events. [2023-11-17 11:39:12,431 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:12,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 103 events. 20/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 361 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-11-17 11:39:12,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 79 transitions, 165 flow [2023-11-17 11:39:12,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 77 transitions, 158 flow [2023-11-17 11:39:12,449 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:12,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 77 transitions, 158 flow [2023-11-17 11:39:12,466 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 77 transitions, 158 flow [2023-11-17 11:39:12,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 77 transitions, 158 flow [2023-11-17 11:39:12,488 INFO L124 PetriNetUnfolderBase]: 19/101 cut-off events. [2023-11-17 11:39:12,488 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:12,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 101 events. 19/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 351 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-11-17 11:39:12,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 2548 [2023-11-17 11:39:13,236 INFO L134 LiptonReduction]: Checked pairs total: 6262 [2023-11-17 11:39:13,236 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-11-17 11:39:13,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:13,254 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;@500a0ac8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:13,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:13,259 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:13,260 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 11:39:13,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:13,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:13,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:39:13,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:13,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 728933080, now seen corresponding path program 1 times [2023-11-17 11:39:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:13,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682815333] [2023-11-17 11:39:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:13,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:13,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:13,424 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:13,425 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:13,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:13,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:39:13,427 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:39:13,432 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:13,432 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:39:13,463 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:39:13,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 130 transitions, 276 flow [2023-11-17 11:39:13,501 INFO L124 PetriNetUnfolderBase]: 38/185 cut-off events. [2023-11-17 11:39:13,501 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:39:13,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 185 events. 38/185 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 817 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-11-17 11:39:13,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 130 transitions, 276 flow [2023-11-17 11:39:13,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 130 transitions, 276 flow [2023-11-17 11:39:13,506 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:13,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 130 transitions, 276 flow [2023-11-17 11:39:13,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 130 transitions, 276 flow [2023-11-17 11:39:13,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 130 transitions, 276 flow [2023-11-17 11:39:13,525 INFO L124 PetriNetUnfolderBase]: 38/185 cut-off events. [2023-11-17 11:39:13,525 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:39:13,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 185 events. 38/185 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 817 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-11-17 11:39:13,532 INFO L119 LiptonReduction]: Number of co-enabled transitions 10388 [2023-11-17 11:39:14,627 INFO L134 LiptonReduction]: Checked pairs total: 27457 [2023-11-17 11:39:14,628 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-11-17 11:39:14,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:14,630 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;@500a0ac8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:14,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:14,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:14,632 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-17 11:39:14,632 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:14,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:14,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:14,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:14,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash 69457307, now seen corresponding path program 1 times [2023-11-17 11:39:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949713182] [2023-11-17 11:39:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:14,700 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 11:39:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949713182] [2023-11-17 11:39:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949713182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:14,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:14,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575075389] [2023-11-17 11:39:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:14,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:14,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 218 [2023-11-17 11:39:14,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 89 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 11:39:14,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:14,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 218 [2023-11-17 11:39:14,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:15,778 INFO L124 PetriNetUnfolderBase]: 10129/15692 cut-off events. [2023-11-17 11:39:15,778 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-17 11:39:15,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31345 conditions, 15692 events. 10129/15692 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 96296 event pairs, 8145 based on Foata normal form. 1102/15034 useless extension candidates. Maximal degree in co-relation 12294. Up to 15529 conditions per place. [2023-11-17 11:39:15,823 INFO L140 encePairwiseOnDemand]: 188/218 looper letters, 68 selfloop transitions, 2 changer transitions 8/83 dead transitions. [2023-11-17 11:39:15,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 338 flow [2023-11-17 11:39:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-17 11:39:15,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345565749235474 [2023-11-17 11:39:15,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-17 11:39:15,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-17 11:39:15,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:15,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-17 11:39:15,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 11:39:15,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 11:39:15,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 11:39:15,845 INFO L175 Difference]: Start difference. First operand has 63 places, 89 transitions, 194 flow. Second operand 3 states and 226 transitions. [2023-11-17 11:39:15,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 338 flow [2023-11-17 11:39:15,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:39:15,850 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 130 flow [2023-11-17 11:39:15,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-11-17 11:39:15,853 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-17 11:39:15,853 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 130 flow [2023-11-17 11:39:15,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 11:39:15,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:15,854 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:39:15,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:39:15,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:15,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 504076711, now seen corresponding path program 1 times [2023-11-17 11:39:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977817510] [2023-11-17 11:39:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:15,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:15,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:15,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:15,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:15,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:15,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:39:15,889 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:39:15,889 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:15,890 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:39:15,909 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:39:15,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 181 transitions, 389 flow [2023-11-17 11:39:15,930 INFO L124 PetriNetUnfolderBase]: 59/278 cut-off events. [2023-11-17 11:39:15,930 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:39:15,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 278 events. 59/278 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1354 event pairs, 1 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 196. Up to 12 conditions per place. [2023-11-17 11:39:15,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 181 transitions, 389 flow [2023-11-17 11:39:15,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 181 transitions, 389 flow [2023-11-17 11:39:15,934 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:15,934 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 181 transitions, 389 flow [2023-11-17 11:39:15,935 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 181 transitions, 389 flow [2023-11-17 11:39:15,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 181 transitions, 389 flow [2023-11-17 11:39:15,953 INFO L124 PetriNetUnfolderBase]: 59/278 cut-off events. [2023-11-17 11:39:15,953 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:39:15,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 278 events. 59/278 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1354 event pairs, 1 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 196. Up to 12 conditions per place. [2023-11-17 11:39:15,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 23226 [2023-11-17 11:39:17,724 INFO L134 LiptonReduction]: Checked pairs total: 62958 [2023-11-17 11:39:17,724 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-17 11:39:17,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:17,726 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;@500a0ac8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:17,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:17,729 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:17,729 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-17 11:39:17,729 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:17,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:17,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:17,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:17,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash -593962419, now seen corresponding path program 1 times [2023-11-17 11:39:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:17,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693607382] [2023-11-17 11:39:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:17,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:17,772 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 11:39:17,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693607382] [2023-11-17 11:39:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693607382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:17,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:17,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915041739] [2023-11-17 11:39:17,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:17,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:17,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 306 [2023-11-17 11:39:17,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 124 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 11:39:17,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:17,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 306 [2023-11-17 11:39:17,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:40,311 INFO L124 PetriNetUnfolderBase]: 298702/407036 cut-off events. [2023-11-17 11:39:40,311 INFO L125 PetriNetUnfolderBase]: For 4201/4201 co-relation queries the response was YES. [2023-11-17 11:39:41,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813218 conditions, 407036 events. 298702/407036 cut-off events. For 4201/4201 co-relation queries the response was YES. Maximal size of possible extension queue 7872. Compared 2893420 event pairs, 255065 based on Foata normal form. 32118/399100 useless extension candidates. Maximal degree in co-relation 252120. Up to 403453 conditions per place. [2023-11-17 11:39:42,001 INFO L140 encePairwiseOnDemand]: 264/306 looper letters, 88 selfloop transitions, 2 changer transitions 9/106 dead transitions. [2023-11-17 11:39:42,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 437 flow [2023-11-17 11:39:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2023-11-17 11:39:42,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32788671023965144 [2023-11-17 11:39:42,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2023-11-17 11:39:42,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2023-11-17 11:39:42,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:42,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2023-11-17 11:39:42,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 11:39:42,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 11:39:42,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 11:39:42,007 INFO L175 Difference]: Start difference. First operand has 86 places, 124 transitions, 275 flow. Second operand 3 states and 301 transitions. [2023-11-17 11:39:42,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 437 flow [2023-11-17 11:39:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 437 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:39:42,020 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 182 flow [2023-11-17 11:39:42,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2023-11-17 11:39:42,021 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 3 predicate places. [2023-11-17 11:39:42,021 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 182 flow [2023-11-17 11:39:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 11:39:42,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:42,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:39:42,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:42,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash 456634047, now seen corresponding path program 1 times [2023-11-17 11:39:42,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:42,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125234053] [2023-11-17 11:39:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:42,078 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 11:39:42,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:42,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125234053] [2023-11-17 11:39:42,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125234053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:42,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147220156] [2023-11-17 11:39:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:42,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:42,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:39:42,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:39:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:42,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:42,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:42,232 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 11:39:42,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:39:42,247 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 11:39:42,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147220156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:39:42,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:39:42,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-17 11:39:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859879029] [2023-11-17 11:39:42,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:39:42,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:39:42,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:39:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 11:39:42,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 306 [2023-11-17 11:39:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 52.5) internal successors, (315), 6 states have internal predecessors, (315), 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 11:39:42,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:42,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 306 [2023-11-17 11:39:42,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:46,544 INFO L124 PetriNetUnfolderBase]: 57096/81722 cut-off events. [2023-11-17 11:39:46,545 INFO L125 PetriNetUnfolderBase]: For 19203/19203 co-relation queries the response was YES. [2023-11-17 11:39:46,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169306 conditions, 81722 events. 57096/81722 cut-off events. For 19203/19203 co-relation queries the response was YES. Maximal size of possible extension queue 1994. Compared 561674 event pairs, 4953 based on Foata normal form. 7239/85592 useless extension candidates. Maximal degree in co-relation 68946. Up to 54872 conditions per place. [2023-11-17 11:39:47,128 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 178 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2023-11-17 11:39:47,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 189 transitions, 770 flow [2023-11-17 11:39:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:39:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:39:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2023-11-17 11:39:47,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.264161220043573 [2023-11-17 11:39:47,135 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2023-11-17 11:39:47,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2023-11-17 11:39:47,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:47,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2023-11-17 11:39:47,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 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 11:39:47,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 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 11:39:47,144 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 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 11:39:47,144 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 182 flow. Second operand 6 states and 485 transitions. [2023-11-17 11:39:47,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 189 transitions, 770 flow [2023-11-17 11:39:47,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 189 transitions, 766 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:39:47,159 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 176 flow [2023-11-17 11:39:47,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-11-17 11:39:47,160 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2023-11-17 11:39:47,161 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 176 flow [2023-11-17 11:39:47,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.5) internal successors, (315), 6 states have internal predecessors, (315), 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 11:39:47,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:47,162 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:39:47,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:39:47,366 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 11:39:47,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:47,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash -384097897, now seen corresponding path program 1 times [2023-11-17 11:39:47,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:47,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49442209] [2023-11-17 11:39:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:47,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:47,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:47,411 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:47,411 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:47,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:47,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:39:47,411 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:39:47,412 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:47,412 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:39:47,438 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:39:47,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 232 transitions, 504 flow [2023-11-17 11:39:47,468 INFO L124 PetriNetUnfolderBase]: 88/395 cut-off events. [2023-11-17 11:39:47,468 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:39:47,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 395 events. 88/395 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2036 event pairs, 6 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 302. Up to 32 conditions per place. [2023-11-17 11:39:47,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 232 transitions, 504 flow [2023-11-17 11:39:47,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 232 transitions, 504 flow [2023-11-17 11:39:47,477 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:47,477 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 232 transitions, 504 flow [2023-11-17 11:39:47,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 232 transitions, 504 flow [2023-11-17 11:39:47,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 232 transitions, 504 flow [2023-11-17 11:39:47,507 INFO L124 PetriNetUnfolderBase]: 88/395 cut-off events. [2023-11-17 11:39:47,508 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:39:47,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 395 events. 88/395 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2036 event pairs, 6 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 302. Up to 32 conditions per place. [2023-11-17 11:39:47,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 41160 [2023-11-17 11:39:50,025 INFO L134 LiptonReduction]: Checked pairs total: 112412 [2023-11-17 11:39:50,025 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-11-17 11:39:50,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:50,027 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;@500a0ac8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:50,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:50,029 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:50,030 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-17 11:39:50,030 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:50,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:50,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:50,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:50,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1900190094, now seen corresponding path program 1 times [2023-11-17 11:39:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:50,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528073763] [2023-11-17 11:39:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:50,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:50,074 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 11:39:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528073763] [2023-11-17 11:39:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528073763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:50,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:50,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:50,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385986017] [2023-11-17 11:39:50,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:50,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:50,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 394 [2023-11-17 11:39:50,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 159 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 11:39:50,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:50,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 394 [2023-11-17 11:39:50,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand