/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-lit/qw2004-2b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:30:13,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:30:13,159 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 11:30:13,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:30:13,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:30:13,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:30:13,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:30:13,187 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:30:13,187 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:30:13,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:30:13,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:30:13,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:30:13,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:30:13,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:30:13,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:30:13,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:30:13,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:30:13,193 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:30:13,193 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:30:13,193 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:30:13,193 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:30:13,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:30:13,194 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:30:13,194 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:30:13,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:30:13,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:30:13,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:30:13,195 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:30:13,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:30:13,195 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:30:13,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:30:13,196 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:30:13,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:30:13,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:30:13,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:30:13,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:30:13,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:30:13,411 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:30:13,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/qw2004-2b.i [2023-11-17 11:30:14,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:30:14,848 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:30:14,853 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2b.i [2023-11-17 11:30:14,867 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c5d6535/3ccd8031422648868eca7d08955da0e4/FLAGd4e93106b [2023-11-17 11:30:14,878 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c5d6535/3ccd8031422648868eca7d08955da0e4 [2023-11-17 11:30:14,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:30:14,882 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:30:14,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:30:14,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:30:14,888 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:30:14,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:30:14" (1/1) ... [2023-11-17 11:30:14,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a8c6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:14, skipping insertion in model container [2023-11-17 11:30:14,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:30:14" (1/1) ... [2023-11-17 11:30:14,933 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:30:15,176 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2b.i[30003,30016] [2023-11-17 11:30:15,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:30:15,205 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:30:15,267 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2b.i[30003,30016] [2023-11-17 11:30:15,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:30:15,312 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:30:15,313 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:30:15,318 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:30:15,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15 WrapperNode [2023-11-17 11:30:15,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:30:15,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:30:15,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:30:15,319 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:30:15,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,352 INFO L138 Inliner]: procedures = 175, calls = 36, calls flagged for inlining = 9, calls inlined = 10, statements flattened = 118 [2023-11-17 11:30:15,352 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:30:15,353 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:30:15,353 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:30:15,353 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:30:15,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:30:15,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:30:15,368 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:30:15,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:30:15,369 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (1/1) ... [2023-11-17 11:30:15,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:30:15,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:30:15,394 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 11:30:15,404 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 11:30:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2023-11-17 11:30:15,429 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2023-11-17 11:30:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:30:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:30:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:30:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:30:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:30:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:30:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:30:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:30:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:30:15,432 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 11:30:15,525 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:30:15,527 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:30:15,686 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:30:15,781 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:30:15,781 INFO L307 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-17 11:30:15,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:30:15 BoogieIcfgContainer [2023-11-17 11:30:15,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:30:15,783 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:30:15,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:30:15,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:30:15,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:30:14" (1/3) ... [2023-11-17 11:30:15,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b2229b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:30:15, skipping insertion in model container [2023-11-17 11:30:15,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:15" (2/3) ... [2023-11-17 11:30:15,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b2229b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:30:15, skipping insertion in model container [2023-11-17 11:30:15,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:30:15" (3/3) ... [2023-11-17 11:30:15,788 INFO L112 eAbstractionObserver]: Analyzing ICFG qw2004-2b.i [2023-11-17 11:30:15,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:30:15,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:30:15,825 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:30:15,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:30:15,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 40 transitions, 84 flow [2023-11-17 11:30:15,892 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-11-17 11:30:15,893 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:15,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 39 events. 5/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-17 11:30:15,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 40 transitions, 84 flow [2023-11-17 11:30:15,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 39 transitions, 81 flow [2023-11-17 11:30:15,900 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:30:15,908 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 39 transitions, 81 flow [2023-11-17 11:30:15,918 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 39 transitions, 81 flow [2023-11-17 11:30:15,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 39 transitions, 81 flow [2023-11-17 11:30:15,926 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-11-17 11:30:15,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:15,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 39 events. 5/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-17 11:30:15,927 INFO L119 LiptonReduction]: Number of co-enabled transitions 624 [2023-11-17 11:30:16,744 INFO L134 LiptonReduction]: Checked pairs total: 916 [2023-11-17 11:30:16,745 INFO L136 LiptonReduction]: Total number of compositions: 36 [2023-11-17 11:30:16,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:30:16,786 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;@4142cdb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:30:16,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:30:16,789 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:30:16,789 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-11-17 11:30:16,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:16,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:16,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:30:16,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:30:16,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash 8919199, now seen corresponding path program 1 times [2023-11-17 11:30:16,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:16,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226869868] [2023-11-17 11:30:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:16,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:16,956 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 11:30:16,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:16,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226869868] [2023-11-17 11:30:16,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226869868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:16,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:16,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:30:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684502743] [2023-11-17 11:30:16,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:16,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:30:16,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:16,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:30:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:30:16,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 76 [2023-11-17 11:30:16,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 33 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 11:30:16,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:16,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 76 [2023-11-17 11:30:16,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:17,029 INFO L124 PetriNetUnfolderBase]: 37/78 cut-off events. [2023-11-17 11:30:17,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:17,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 78 events. 37/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 215 event pairs, 15 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 152. Up to 69 conditions per place. [2023-11-17 11:30:17,031 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 13 selfloop transitions, 2 changer transitions 8/23 dead transitions. [2023-11-17 11:30:17,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 95 flow [2023-11-17 11:30:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:30:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:30:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-17 11:30:17,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2023-11-17 11:30:17,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-17 11:30:17,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-17 11:30:17,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:17,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-17 11:30:17,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 11:30:17,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 11:30:17,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 11:30:17,049 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 33 flow. Second operand 3 states and 84 transitions. [2023-11-17 11:30:17,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 95 flow [2023-11-17 11:30:17,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:30:17,051 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 32 flow [2023-11-17 11:30:17,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-11-17 11:30:17,055 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2023-11-17 11:30:17,055 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 32 flow [2023-11-17 11:30:17,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 11:30:17,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:17,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:30:17,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:30:17,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:30:17,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash 276480819, now seen corresponding path program 1 times [2023-11-17 11:30:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:17,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263074720] [2023-11-17 11:30:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:17,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:17,146 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 11:30:17,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263074720] [2023-11-17 11:30:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263074720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:17,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:30:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108513696] [2023-11-17 11:30:17,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:30:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:30:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:30:17,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 76 [2023-11-17 11:30:17,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 11 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 11:30:17,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:17,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 76 [2023-11-17 11:30:17,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:17,171 INFO L124 PetriNetUnfolderBase]: 16/38 cut-off events. [2023-11-17 11:30:17,171 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:30:17,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 38 events. 16/38 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 8 based on Foata normal form. 4/42 useless extension candidates. Maximal degree in co-relation 84. Up to 29 conditions per place. [2023-11-17 11:30:17,171 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 13 selfloop transitions, 2 changer transitions 0/15 dead transitions. [2023-11-17 11:30:17,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 15 transitions, 72 flow [2023-11-17 11:30:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:30:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:30:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-17 11:30:17,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:30:17,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-17 11:30:17,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-17 11:30:17,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:17,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-17 11:30:17,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 11:30:17,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 11:30:17,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 11:30:17,175 INFO L175 Difference]: Start difference. First operand has 19 places, 11 transitions, 32 flow. Second operand 3 states and 76 transitions. [2023-11-17 11:30:17,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 15 transitions, 72 flow [2023-11-17 11:30:17,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 15 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:30:17,176 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 36 flow [2023-11-17 11:30:17,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-11-17 11:30:17,176 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2023-11-17 11:30:17,177 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 36 flow [2023-11-17 11:30:17,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 11:30:17,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:17,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:17,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:30:17,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:30:17,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1112662180, now seen corresponding path program 1 times [2023-11-17 11:30:17,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:17,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441942785] [2023-11-17 11:30:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:17,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:17,228 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 11:30:17,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441942785] [2023-11-17 11:30:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441942785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:17,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:17,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:30:17,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123806734] [2023-11-17 11:30:17,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:17,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:30:17,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:17,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:30:17,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:30:17,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 76 [2023-11-17 11:30:17,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 11 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 11:30:17,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:17,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 76 [2023-11-17 11:30:17,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:17,254 INFO L124 PetriNetUnfolderBase]: 15/41 cut-off events. [2023-11-17 11:30:17,254 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:30:17,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 41 events. 15/41 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 12 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 97. Up to 35 conditions per place. [2023-11-17 11:30:17,255 INFO L140 encePairwiseOnDemand]: 74/76 looper letters, 10 selfloop transitions, 0 changer transitions 4/14 dead transitions. [2023-11-17 11:30:17,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 14 transitions, 73 flow [2023-11-17 11:30:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:30:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:30:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2023-11-17 11:30:17,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32894736842105265 [2023-11-17 11:30:17,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2023-11-17 11:30:17,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2023-11-17 11:30:17,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:17,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2023-11-17 11:30:17,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 11:30:17,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 11:30:17,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 11:30:17,258 INFO L175 Difference]: Start difference. First operand has 17 places, 11 transitions, 36 flow. Second operand 3 states and 75 transitions. [2023-11-17 11:30:17,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 14 transitions, 73 flow [2023-11-17 11:30:17,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 14 transitions, 67 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:30:17,259 INFO L231 Difference]: Finished difference. Result has 18 places, 10 transitions, 30 flow [2023-11-17 11:30:17,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=18, PETRI_TRANSITIONS=10} [2023-11-17 11:30:17,259 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-11-17 11:30:17,259 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 30 flow [2023-11-17 11:30:17,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 11:30:17,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:17,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:30:17,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:30:17,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1499466002, now seen corresponding path program 1 times [2023-11-17 11:30:17,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:17,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803781808] [2023-11-17 11:30:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:17,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:30:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:17,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:30:17,305 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:30:17,306 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-17 11:30:17,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-11-17 11:30:17,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:30:17,308 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:30:17,311 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 11:30:17,311 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 11:30:17,323 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-17 11:30:17,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 11:30:17 BasicIcfg [2023-11-17 11:30:17,329 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 11:30:17,330 INFO L158 Benchmark]: Toolchain (without parser) took 2448.14ms. Allocated memory is still 263.2MB. Free memory was 214.0MB in the beginning and 106.4MB in the end (delta: 107.6MB). Peak memory consumption was 108.5MB. Max. memory is 8.0GB. [2023-11-17 11:30:17,330 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 177.2MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 11:30:17,330 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.46ms. Allocated memory is still 263.2MB. Free memory was 214.0MB in the beginning and 194.0MB in the end (delta: 20.0MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 11:30:17,331 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.74ms. Allocated memory is still 263.2MB. Free memory was 194.0MB in the beginning and 191.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 11:30:17,331 INFO L158 Benchmark]: Boogie Preprocessor took 15.21ms. Allocated memory is still 263.2MB. Free memory was 191.8MB in the beginning and 190.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 11:30:17,331 INFO L158 Benchmark]: RCFGBuilder took 413.67ms. Allocated memory is still 263.2MB. Free memory was 190.3MB in the beginning and 165.8MB in the end (delta: 24.5MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-11-17 11:30:17,332 INFO L158 Benchmark]: TraceAbstraction took 1546.06ms. Allocated memory is still 263.2MB. Free memory was 164.7MB in the beginning and 106.4MB in the end (delta: 58.4MB). Peak memory consumption was 59.2MB. Max. memory is 8.0GB. [2023-11-17 11:30:17,333 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 177.2MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 433.46ms. Allocated memory is still 263.2MB. Free memory was 214.0MB in the beginning and 194.0MB in the end (delta: 20.0MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.74ms. Allocated memory is still 263.2MB. Free memory was 194.0MB in the beginning and 191.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.21ms. Allocated memory is still 263.2MB. Free memory was 191.8MB in the beginning and 190.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 413.67ms. Allocated memory is still 263.2MB. Free memory was 190.3MB in the beginning and 165.8MB in the end (delta: 24.5MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * TraceAbstraction took 1546.06ms. Allocated memory is still 263.2MB. Free memory was 164.7MB in the beginning and 106.4MB in the end (delta: 58.4MB). Peak memory consumption was 59.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.8s, 38 PlacesBefore, 17 PlacesAfterwards, 39 TransitionsBefore, 15 TransitionsAfterwards, 624 CoEnabledTransitionPairs, 4 FixpointIterations, 0 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 3 ChoiceCompositions, 36 TotalNumberOfCompositions, 916 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 651, independent: 594, independent conditional: 0, independent unconditional: 594, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 462, independent: 439, independent conditional: 0, independent unconditional: 439, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 462, independent: 437, independent conditional: 0, independent unconditional: 437, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 25, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 81, independent: 5, independent conditional: 0, independent unconditional: 5, dependent: 77, dependent conditional: 0, dependent unconditional: 77, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 651, independent: 155, independent conditional: 0, independent unconditional: 155, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 462, unknown conditional: 0, unknown unconditional: 462] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 37, Positive conditional cache size: 0, Positive unconditional cache size: 37, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 690]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L697] 0 volatile int stoppingFlag; [L698] 0 volatile int pendingIo; [L699] 0 volatile int stoppingEvent; [L700] 0 volatile int stopped; [L756] 0 pthread_t t; [L757] 0 pendingIo = 1 [L758] 0 stoppingFlag = 0 [L759] 0 stoppingEvent = 0 [L760] 0 stopped = 0 [L761] FCALL, FORK 0 pthread_create(&t, 0, BCSP_PnpStop, 0) VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L762] CALL 0 BCSP_PnpAdd(0) [L734] 0 int status; [L735] CALL, EXPR 0 BCSP_IoIncrement() [L703] 0 int lsf = stoppingFlag; VAL [lsf=0, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L745] 1 stoppingFlag = 1 VAL [arg={0:0}, arg={0:0}, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L705] COND FALSE 0 !(\read(lsf)) [L709] 0 int lp = pendingIo; VAL [lp=1, lsf=0, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L747] CALL 1 BCSP_IoDecrement() [L725] 1 int pending; [L726] CALL, EXPR 1 dec() [L719] 1 pendingIo-- [L720] 1 int tmp = pendingIo; [L722] 1 return tmp; [L726] RET, EXPR 1 dec() [L726] 1 pending = dec() [L712] EXPR 0 pendingIo = lp + 1 [L707-L714] 0 { __VERIFIER_atomic_begin(); int lp = pendingIo; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); pendingIo = lp + 1; __VERIFIER_atomic_end(); } [L715] 0 return 0; [L735] RET, EXPR 0 BCSP_IoIncrement() [L735] 0 status = BCSP_IoIncrement() [L727] COND TRUE 1 pending == 0 [L729] 1 stoppingEvent = 1 [L747] RET 1 BCSP_IoDecrement() [L749] 1 int lse = stoppingEvent; [L751] CALL 1 assume_abort_if_not(lse) [L686] COND FALSE 1 !(!cond) [L751] RET 1 assume_abort_if_not(lse) [L752] 1 stopped = 1 [L753] 1 return 0; [L736] COND TRUE 0 status == 0 [L737] 0 int local_assertion = !stopped; [L738] CALL 0 __VERIFIER_assert(local_assertion) [L689] COND TRUE 0 !(cond) [L690] 0 reach_error() VAL [\old(cond)=0, cond=0, pendingIo=2, stopped=1, stoppingEvent=1, stoppingFlag=1] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 50 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 74 IncrementalHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 74 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 35 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-17 11:30:17,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...