/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_28-funptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:39:19,453 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:39:19,533 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 11:39:19,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:39:19,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:39:19,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:39:19,573 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:39:19,573 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:39:19,573 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:39:19,574 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:39:19,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:39:19,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:39:19,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:39:19,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:39:19,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:39:19,576 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:39:19,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:39:19,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:39:19,577 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:39:19,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:39:19,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:39:19,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:39:19,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:39:19,579 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:39:19,579 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:39:19,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:39:19,580 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:39:19,580 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:39:19,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:39:19,581 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:39:19,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:39:19,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:39:19,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:39:19,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:39:19,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:39:19,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:39:19,861 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:39:19,862 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:39:19,863 INFO L431 ainManager$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 11:39:21,140 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:39:21,401 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:39:21,402 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-11-17 11:39:21,417 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b30bbff/f9dca271af424e6faebc3f695ac1b06d/FLAG03e7460e5 [2023-11-17 11:39:21,435 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b30bbff/f9dca271af424e6faebc3f695ac1b06d [2023-11-17 11:39:21,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:39:21,439 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:39:21,440 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:39:21,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:39:21,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:39:21,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:39:21" (1/1) ... [2023-11-17 11:39:21,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c179430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:21, skipping insertion in model container [2023-11-17 11:39:21,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:39:21" (1/1) ... [2023-11-17 11:39:21,502 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:39:21,898 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 11:39:21,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:39:21,944 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:39:21,984 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 11:39:22,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:39:22,066 WARN L675 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:39:22,073 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:39:22,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22 WrapperNode [2023-11-17 11:39:22,074 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:39:22,075 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:39:22,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:39:22,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:39:22,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,137 INFO L138 Inliner]: procedures = 274, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 144 [2023-11-17 11:39:22,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:39:22,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:39:22,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:39:22,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:39:22,147 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:39:22,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:39:22,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:39:22,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:39:22,187 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (1/1) ... [2023-11-17 11:39:22,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:39:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:22,216 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 11:39:22,221 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 11:39:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:39:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:39:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:39:22,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:39:22,244 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:39:22,244 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:39:22,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:39:22,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:39:22,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:39:22,246 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 11:39:22,374 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:39:22,376 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:39:22,582 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:39:22,731 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:39:22,731 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 11:39:22,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:39:22 BoogieIcfgContainer [2023-11-17 11:39:22,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:39:22,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:39:22,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:39:22,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:39:22,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:39:21" (1/3) ... [2023-11-17 11:39:22,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2034e25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:39:22, skipping insertion in model container [2023-11-17 11:39:22,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:22" (2/3) ... [2023-11-17 11:39:22,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2034e25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:39:22, skipping insertion in model container [2023-11-17 11:39:22,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:39:22" (3/3) ... [2023-11-17 11:39:22,740 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2023-11-17 11:39:22,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:39:22,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:39:22,755 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:39:22,793 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:39:22,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 57 transitions, 121 flow [2023-11-17 11:39:22,888 INFO L124 PetriNetUnfolderBase]: 13/81 cut-off events. [2023-11-17 11:39:22,888 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:22,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 81 events. 13/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 246 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2023-11-17 11:39:22,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 57 transitions, 121 flow [2023-11-17 11:39:22,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 55 transitions, 114 flow [2023-11-17 11:39:22,905 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:22,917 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 55 transitions, 114 flow [2023-11-17 11:39:22,919 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 55 transitions, 114 flow [2023-11-17 11:39:22,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 55 transitions, 114 flow [2023-11-17 11:39:22,953 INFO L124 PetriNetUnfolderBase]: 12/79 cut-off events. [2023-11-17 11:39:22,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:22,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 79 events. 12/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 240 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2023-11-17 11:39:22,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 1404 [2023-11-17 11:39:23,679 INFO L134 LiptonReduction]: Checked pairs total: 3507 [2023-11-17 11:39:23,679 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-11-17 11:39:23,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:23,699 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;@25517832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:23,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:23,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:23,704 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-11-17 11:39:23,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:23,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:23,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:39:23,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1242736076, now seen corresponding path program 1 times [2023-11-17 11:39:23,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95116784] [2023-11-17 11:39:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:23,864 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:23,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:23,908 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:23,909 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:23,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:23,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:39:23,912 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:39:23,915 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:23,915 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:39:23,937 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:39:23,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 86 transitions, 188 flow [2023-11-17 11:39:23,959 INFO L124 PetriNetUnfolderBase]: 24/141 cut-off events. [2023-11-17 11:39:23,960 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:39:23,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 141 events. 24/141 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 545 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 85. Up to 6 conditions per place. [2023-11-17 11:39:23,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 86 transitions, 188 flow [2023-11-17 11:39:23,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 86 transitions, 188 flow [2023-11-17 11:39:23,963 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:23,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 86 transitions, 188 flow [2023-11-17 11:39:23,964 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 86 transitions, 188 flow [2023-11-17 11:39:23,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 86 transitions, 188 flow [2023-11-17 11:39:23,982 INFO L124 PetriNetUnfolderBase]: 24/141 cut-off events. [2023-11-17 11:39:23,983 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:39:23,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 141 events. 24/141 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 545 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 85. Up to 6 conditions per place. [2023-11-17 11:39:23,987 INFO L119 LiptonReduction]: Number of co-enabled transitions 4536 [2023-11-17 11:39:24,923 INFO L134 LiptonReduction]: Checked pairs total: 12323 [2023-11-17 11:39:24,924 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-11-17 11:39:24,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:24,927 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;@25517832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:24,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:24,932 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:24,933 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2023-11-17 11:39:24,933 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:24,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:24,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:24,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:24,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1181740169, now seen corresponding path program 1 times [2023-11-17 11:39:24,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:24,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575414804] [2023-11-17 11:39:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:25,075 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 11:39:25,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:25,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575414804] [2023-11-17 11:39:25,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575414804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:25,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:25,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004885258] [2023-11-17 11:39:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:25,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:25,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 137 [2023-11-17 11:39:25,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 59 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 11:39:25,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:25,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 137 [2023-11-17 11:39:25,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:25,794 INFO L124 PetriNetUnfolderBase]: 3775/6084 cut-off events. [2023-11-17 11:39:25,795 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-17 11:39:25,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12177 conditions, 6084 events. 3775/6084 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 32449 event pairs, 3027 based on Foata normal form. 355/5938 useless extension candidates. Maximal degree in co-relation 7525. Up to 6012 conditions per place. [2023-11-17 11:39:25,826 INFO L140 encePairwiseOnDemand]: 119/137 looper letters, 44 selfloop transitions, 2 changer transitions 8/57 dead transitions. [2023-11-17 11:39:25,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 238 flow [2023-11-17 11:39:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-17 11:39:25,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34549878345498786 [2023-11-17 11:39:25,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-17 11:39:25,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-17 11:39:25,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:25,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-17 11:39:25,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 11:39:25,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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 11:39:25,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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 11:39:25,855 INFO L175 Difference]: Start difference. First operand has 47 places, 59 transitions, 134 flow. Second operand 3 states and 142 transitions. [2023-11-17 11:39:25,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 238 flow [2023-11-17 11:39:25,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:39:25,863 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 94 flow [2023-11-17 11:39:25,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2023-11-17 11:39:25,869 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-11-17 11:39:25,869 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 94 flow [2023-11-17 11:39:25,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 11:39:25,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:25,870 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:39:25,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:39:25,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:25,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1118130703, now seen corresponding path program 1 times [2023-11-17 11:39:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565151657] [2023-11-17 11:39:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:25,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:25,926 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:25,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:25,991 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:25,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:25,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:25,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:39:25,992 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:39:25,993 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:25,993 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:39:26,024 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:39:26,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 115 transitions, 257 flow [2023-11-17 11:39:26,057 INFO L124 PetriNetUnfolderBase]: 38/212 cut-off events. [2023-11-17 11:39:26,057 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:39:26,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 212 events. 38/212 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 955 event pairs, 1 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 152. Up to 12 conditions per place. [2023-11-17 11:39:26,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 115 transitions, 257 flow [2023-11-17 11:39:26,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 115 transitions, 257 flow [2023-11-17 11:39:26,060 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:26,060 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 115 transitions, 257 flow [2023-11-17 11:39:26,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 115 transitions, 257 flow [2023-11-17 11:39:26,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 115 transitions, 257 flow [2023-11-17 11:39:26,084 INFO L124 PetriNetUnfolderBase]: 38/212 cut-off events. [2023-11-17 11:39:26,084 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:39:26,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 212 events. 38/212 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 955 event pairs, 1 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 152. Up to 12 conditions per place. [2023-11-17 11:39:26,091 INFO L119 LiptonReduction]: Number of co-enabled transitions 9234 [2023-11-17 11:39:27,221 INFO L134 LiptonReduction]: Checked pairs total: 29675 [2023-11-17 11:39:27,222 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-11-17 11:39:27,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:27,229 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;@25517832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:27,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:27,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:27,232 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-11-17 11:39:27,232 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:27,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:27,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:27,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:27,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash -255816317, now seen corresponding path program 1 times [2023-11-17 11:39:27,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162283263] [2023-11-17 11:39:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:27,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:27,294 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 11:39:27,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:27,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162283263] [2023-11-17 11:39:27,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162283263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:27,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:27,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667863208] [2023-11-17 11:39:27,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:27,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:27,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:27,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 186 [2023-11-17 11:39:27,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 78 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 11:39:27,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:27,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 186 [2023-11-17 11:39:27,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:34,455 INFO L124 PetriNetUnfolderBase]: 71320/99914 cut-off events. [2023-11-17 11:39:34,455 INFO L125 PetriNetUnfolderBase]: For 1685/1685 co-relation queries the response was YES. [2023-11-17 11:39:34,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200146 conditions, 99914 events. 71320/99914 cut-off events. For 1685/1685 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 628821 event pairs, 62099 based on Foata normal form. 6623/100176 useless extension candidates. Maximal degree in co-relation 102881. Up to 99093 conditions per place. [2023-11-17 11:39:34,972 INFO L140 encePairwiseOnDemand]: 163/186 looper letters, 56 selfloop transitions, 2 changer transitions 9/71 dead transitions. [2023-11-17 11:39:34,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 303 flow [2023-11-17 11:39:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-11-17 11:39:34,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32437275985663083 [2023-11-17 11:39:34,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-11-17 11:39:34,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-11-17 11:39:34,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:34,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-11-17 11:39:34,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 11:39:34,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 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 11:39:34,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 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 11:39:34,981 INFO L175 Difference]: Start difference. First operand has 62 places, 78 transitions, 183 flow. Second operand 3 states and 181 transitions. [2023-11-17 11:39:34,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 303 flow [2023-11-17 11:39:34,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 303 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:39:34,990 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 128 flow [2023-11-17 11:39:34,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-11-17 11:39:34,992 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-11-17 11:39:34,992 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 128 flow [2023-11-17 11:39:34,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 11:39:34,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:34,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:34,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:39:34,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:34,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1835275558, now seen corresponding path program 1 times [2023-11-17 11:39:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:34,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8811906] [2023-11-17 11:39:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:34,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:35,074 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 11:39:35,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:35,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8811906] [2023-11-17 11:39:35,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8811906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:35,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143933959] [2023-11-17 11:39:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:35,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:35,085 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 11:39:35,113 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 11:39:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:35,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:35,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:35,242 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 11:39:35,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:39:35,260 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 11:39:35,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143933959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:39:35,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:39:35,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-17 11:39:35,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028458564] [2023-11-17 11:39:35,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:39:35,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:39:35,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:39:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 11:39:35,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 186 [2023-11-17 11:39:35,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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 11:39:35,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:35,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 186 [2023-11-17 11:39:35,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:36,743 INFO L124 PetriNetUnfolderBase]: 13354/20893 cut-off events. [2023-11-17 11:39:36,743 INFO L125 PetriNetUnfolderBase]: For 7355/7355 co-relation queries the response was YES. [2023-11-17 11:39:36,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42419 conditions, 20893 events. 13354/20893 cut-off events. For 7355/7355 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 141058 event pairs, 0 based on Foata normal form. 1884/22777 useless extension candidates. Maximal degree in co-relation 3607. Up to 12960 conditions per place. [2023-11-17 11:39:36,894 INFO L140 encePairwiseOnDemand]: 183/186 looper letters, 106 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-11-17 11:39:36,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 114 transitions, 476 flow [2023-11-17 11:39:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:39:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:39:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 287 transitions. [2023-11-17 11:39:36,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.257168458781362 [2023-11-17 11:39:36,906 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 287 transitions. [2023-11-17 11:39:36,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 287 transitions. [2023-11-17 11:39:36,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:36,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 287 transitions. [2023-11-17 11:39:36,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 47.833333333333336) internal successors, (287), 6 states have internal predecessors, (287), 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 11:39:36,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 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 11:39:36,915 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 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 11:39:36,915 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 128 flow. Second operand 6 states and 287 transitions. [2023-11-17 11:39:36,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 114 transitions, 476 flow [2023-11-17 11:39:36,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 114 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:39:36,933 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 122 flow [2023-11-17 11:39:36,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-11-17 11:39:36,935 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2023-11-17 11:39:36,935 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 122 flow [2023-11-17 11:39:36,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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 11:39:36,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:36,935 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:39:36,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:39:37,145 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 11:39:37,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:37,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash -534519757, now seen corresponding path program 1 times [2023-11-17 11:39:37,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:37,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107258550] [2023-11-17 11:39:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:37,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:37,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:37,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:37,216 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:37,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:37,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:39:37,217 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:39:37,217 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:37,217 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:39:37,253 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:39:37,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 144 transitions, 328 flow [2023-11-17 11:39:37,289 INFO L124 PetriNetUnfolderBase]: 60/307 cut-off events. [2023-11-17 11:39:37,289 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:39:37,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 307 events. 60/307 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1447 event pairs, 6 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 236. Up to 32 conditions per place. [2023-11-17 11:39:37,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 144 transitions, 328 flow [2023-11-17 11:39:37,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 144 transitions, 328 flow [2023-11-17 11:39:37,299 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:37,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 144 transitions, 328 flow [2023-11-17 11:39:37,299 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 144 transitions, 328 flow [2023-11-17 11:39:37,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 144 transitions, 328 flow [2023-11-17 11:39:37,326 INFO L124 PetriNetUnfolderBase]: 60/307 cut-off events. [2023-11-17 11:39:37,326 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:39:37,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 307 events. 60/307 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1447 event pairs, 6 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 236. Up to 32 conditions per place. [2023-11-17 11:39:37,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 15552 [2023-11-17 11:39:39,017 INFO L134 LiptonReduction]: Checked pairs total: 44530 [2023-11-17 11:39:39,017 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-11-17 11:39:39,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:39,019 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;@25517832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:39,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:39,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:39,023 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-17 11:39:39,023 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:39,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:39,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:39,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:39,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash 670845622, now seen corresponding path program 1 times [2023-11-17 11:39:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:39,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156409748] [2023-11-17 11:39:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:39,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:39,054 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 11:39:39,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:39,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156409748] [2023-11-17 11:39:39,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156409748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:39,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:39,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:39,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118754688] [2023-11-17 11:39:39,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:39,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:39,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 233 [2023-11-17 11:39:39,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 238 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 11:39:39,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:39,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 233 [2023-11-17 11:39:39,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand