/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 18:33:32,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 18:33:32,811 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-VariableLbe.epf [2023-08-24 18:33:32,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 18:33:32,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 18:33:32,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 18:33:32,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 18:33:32,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 18:33:32,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 18:33:32,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 18:33:32,842 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 18:33:32,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 18:33:32,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 18:33:32,843 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 18:33:32,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 18:33:32,843 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 18:33:32,843 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 18:33:32,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 18:33:32,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 18:33:32,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 18:33:32,844 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 18:33:32,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 18:33:32,845 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 18:33:32,845 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 18:33:32,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 18:33:32,845 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 18:33:32,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 18:33:32,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 18:33:32,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 18:33:32,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 18:33:32,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 18:33:32,847 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 18:33:32,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 18:33:32,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 18:33:32,847 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 18:33:32,847 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-24 18:33:33,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 18:33:33,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 18:33:33,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 18:33:33,109 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 18:33:33,109 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 18:33:33,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-24 18:33:34,035 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 18:33:34,226 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 18:33:34,226 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-24 18:33:34,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83d4c280/3f68a48e8a3b403dbc071e931fc3393a/FLAG28b20224d [2023-08-24 18:33:34,251 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83d4c280/3f68a48e8a3b403dbc071e931fc3393a [2023-08-24 18:33:34,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 18:33:34,253 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 18:33:34,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 18:33:34,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 18:33:34,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 18:33:34,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aae5e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34, skipping insertion in model container [2023-08-24 18:33:34,256 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,288 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 18:33:34,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 18:33:34,467 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 18:33:34,497 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-24 18:33:34,498 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-24 18:33:34,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 18:33:34,543 INFO L206 MainTranslator]: Completed translation [2023-08-24 18:33:34,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34 WrapperNode [2023-08-24 18:33:34,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 18:33:34,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 18:33:34,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 18:33:34,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 18:33:34,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,584 INFO L138 Inliner]: procedures = 167, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-08-24 18:33:34,584 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 18:33:34,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 18:33:34,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 18:33:34,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 18:33:34,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,607 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,614 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 18:33:34,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 18:33:34,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 18:33:34,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 18:33:34,616 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (1/1) ... [2023-08-24 18:33:34,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 18:33:34,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 18:33:34,644 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) [2023-08-24 18:33:34,655 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 [2023-08-24 18:33:34,675 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-24 18:33:34,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-24 18:33:34,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 18:33:34,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 18:33:34,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 18:33:34,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 18:33:34,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 18:33:34,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 18:33:34,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 18:33:34,677 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 18:33:34,789 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 18:33:34,790 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 18:33:34,949 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 18:33:34,953 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 18:33:34,953 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 18:33:34,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:33:34 BoogieIcfgContainer [2023-08-24 18:33:34,954 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 18:33:34,956 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 18:33:34,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 18:33:34,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 18:33:34,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:33:34" (1/3) ... [2023-08-24 18:33:34,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6746dc94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:33:34, skipping insertion in model container [2023-08-24 18:33:34,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:33:34" (2/3) ... [2023-08-24 18:33:34,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6746dc94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:33:34, skipping insertion in model container [2023-08-24 18:33:34,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:33:34" (3/3) ... [2023-08-24 18:33:34,959 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-08-24 18:33:34,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 18:33:34,971 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 18:33:34,971 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 18:33:35,024 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:33:35,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 71 transitions, 147 flow [2023-08-24 18:33:35,068 INFO L124 PetriNetUnfolderBase]: 11/81 cut-off events. [2023-08-24 18:33:35,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:33:35,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 81 events. 11/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 59. Up to 4 conditions per place. [2023-08-24 18:33:35,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 71 transitions, 147 flow [2023-08-24 18:33:35,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 71 transitions, 147 flow [2023-08-24 18:33:35,076 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:33:35,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 71 transitions, 147 flow [2023-08-24 18:33:35,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 71 transitions, 147 flow [2023-08-24 18:33:35,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 71 transitions, 147 flow [2023-08-24 18:33:35,105 INFO L124 PetriNetUnfolderBase]: 11/81 cut-off events. [2023-08-24 18:33:35,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:33:35,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 81 events. 11/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 59. Up to 4 conditions per place. [2023-08-24 18:33:35,107 INFO L119 LiptonReduction]: Number of co-enabled transitions 1222 [2023-08-24 18:33:36,358 INFO L134 LiptonReduction]: Checked pairs total: 993 [2023-08-24 18:33:36,358 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-24 18:33:36,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:33:36,377 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=LoopsAndPotentialCycles, 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;@5f147acf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:33:36,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 18:33:36,383 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:33:36,383 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-24 18:33:36,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:33:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:33:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 18:33:36,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-24 18:33:36,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:33:36,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1107864990, now seen corresponding path program 1 times [2023-08-24 18:33:36,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:33:36,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903954739] [2023-08-24 18:33:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:33:36,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:33:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:33:36,478 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:33:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:33:36,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:33:36,520 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:33:36,521 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-24 18:33:36,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2023-08-24 18:33:36,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2023-08-24 18:33:36,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 18:33:36,523 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 18:33:36,525 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 18:33:36,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 18:33:36,558 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:33:36,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 119 transitions, 250 flow [2023-08-24 18:33:36,601 INFO L124 PetriNetUnfolderBase]: 21/141 cut-off events. [2023-08-24 18:33:36,601 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 18:33:36,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 21/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 295 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-24 18:33:36,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 119 transitions, 250 flow [2023-08-24 18:33:36,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 119 transitions, 250 flow [2023-08-24 18:33:36,605 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:33:36,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 119 transitions, 250 flow [2023-08-24 18:33:36,606 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 119 transitions, 250 flow [2023-08-24 18:33:36,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 119 transitions, 250 flow [2023-08-24 18:33:36,623 INFO L124 PetriNetUnfolderBase]: 21/141 cut-off events. [2023-08-24 18:33:36,623 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 18:33:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 21/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 295 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-24 18:33:36,627 INFO L119 LiptonReduction]: Number of co-enabled transitions 6956 [2023-08-24 18:33:38,508 INFO L134 LiptonReduction]: Checked pairs total: 5400 [2023-08-24 18:33:38,508 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-24 18:33:38,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:33:38,511 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=LoopsAndPotentialCycles, 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;@5f147acf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:33:38,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 18:33:38,512 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:33:38,513 INFO L124 PetriNetUnfolderBase]: 5/18 cut-off events. [2023-08-24 18:33:38,513 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 18:33:38,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:33:38,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 18:33:38,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-24 18:33:38,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:33:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash 647426851, now seen corresponding path program 1 times [2023-08-24 18:33:38,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:33:38,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613767580] [2023-08-24 18:33:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:33:38,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:33:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:33:38,534 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:33:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:33:38,550 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:33:38,550 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:33:38,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2023-08-24 18:33:38,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2023-08-24 18:33:38,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 18:33:38,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2023-08-24 18:33:38,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 18:33:38,551 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 18:33:38,554 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-24 18:33:38,554 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 18:33:38,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 06:33:38 BasicIcfg [2023-08-24 18:33:38,566 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 18:33:38,567 INFO L158 Benchmark]: Toolchain (without parser) took 4313.46ms. Allocated memory was 381.7MB in the beginning and 480.2MB in the end (delta: 98.6MB). Free memory was 356.9MB in the beginning and 381.2MB in the end (delta: -24.3MB). Peak memory consumption was 74.6MB. Max. memory is 16.0GB. [2023-08-24 18:33:38,567 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 381.7MB. Free memory is still 358.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 18:33:38,567 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.64ms. Allocated memory is still 381.7MB. Free memory was 356.9MB in the beginning and 337.2MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 18:33:38,567 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.44ms. Allocated memory is still 381.7MB. Free memory was 337.2MB in the beginning and 335.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 18:33:38,568 INFO L158 Benchmark]: Boogie Preprocessor took 29.29ms. Allocated memory is still 381.7MB. Free memory was 335.2MB in the beginning and 333.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 18:33:38,568 INFO L158 Benchmark]: RCFGBuilder took 338.72ms. Allocated memory is still 381.7MB. Free memory was 333.8MB in the beginning and 320.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 18:33:38,568 INFO L158 Benchmark]: TraceAbstraction took 3610.08ms. Allocated memory was 381.7MB in the beginning and 480.2MB in the end (delta: 98.6MB). Free memory was 320.5MB in the beginning and 381.2MB in the end (delta: -60.7MB). Peak memory consumption was 39.0MB. Max. memory is 16.0GB. [2023-08-24 18:33:38,570 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 381.7MB. Free memory is still 358.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 289.64ms. Allocated memory is still 381.7MB. Free memory was 356.9MB in the beginning and 337.2MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.44ms. Allocated memory is still 381.7MB. Free memory was 337.2MB in the beginning and 335.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.29ms. Allocated memory is still 381.7MB. Free memory was 335.2MB in the beginning and 333.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 338.72ms. Allocated memory is still 381.7MB. Free memory was 333.8MB in the beginning and 320.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 3610.08ms. Allocated memory was 381.7MB in the beginning and 480.2MB in the end (delta: 98.6MB). Free memory was 320.5MB in the beginning and 381.2MB in the end (delta: -60.7MB). Peak memory consumption was 39.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 64 PlacesBefore, 15 PlacesAfterwards, 71 TransitionsBefore, 17 TransitionsAfterwards, 1222 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 5 ChoiceCompositions, 63 TotalNumberOfCompositions, 993 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 993, independent: 993, independent conditional: 0, independent unconditional: 993, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 605, independent: 605, independent conditional: 0, independent unconditional: 605, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 993, independent: 388, independent conditional: 0, independent unconditional: 388, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 605, unknown conditional: 0, unknown unconditional: 605] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 105 PlacesBefore, 25 PlacesAfterwards, 119 TransitionsBefore, 30 TransitionsAfterwards, 6956 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 25 ConcurrentYvCompositions, 9 ChoiceCompositions, 109 TotalNumberOfCompositions, 5400 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5400, independent: 5400, independent conditional: 0, independent unconditional: 5400, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3505, independent: 3505, independent conditional: 0, independent unconditional: 3505, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5400, independent: 1895, independent conditional: 0, independent unconditional: 1895, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 3505, unknown conditional: 0, unknown unconditional: 3505] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 12]: assertion can be violated assertion can be violated We found a FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [pthread_create(&t, 0, thr1, 0)=-1, t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i