/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 -i ../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:48:52,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:48:52,711 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 [2023-08-23 22:48:52,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:48:52,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:48:52,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:48:52,748 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:48:52,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:48:52,749 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:48:52,753 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:48:52,753 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:48:52,753 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:48:52,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:48:52,754 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:48:52,755 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:48:52,755 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:48:52,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:48:52,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:48:52,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:48:52,756 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:48:52,756 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:48:52,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:48:52,757 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:48:52,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:48:52,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:48:52,758 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:48:52,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:48:52,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:48:52,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:48:52,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:48:52,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:48:52,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:48:52,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:48:52,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:48:52,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:48:52,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:48:53,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:48:53,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:48:53,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:48:53,082 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:48:53,082 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:48:53,084 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-23 22:48:54,173 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:48:54,471 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:48:54,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-23 22:48:54,490 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3931b4392/85d46d6092bc42cdb85f42cf9ca4c2c8/FLAG95ee97ec6 [2023-08-23 22:48:54,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3931b4392/85d46d6092bc42cdb85f42cf9ca4c2c8 [2023-08-23 22:48:54,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:48:54,512 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:48:54,515 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:48:54,515 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:48:54,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:48:54,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:48:54" (1/1) ... [2023-08-23 22:48:54,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fcf132c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:54, skipping insertion in model container [2023-08-23 22:48:54,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:48:54" (1/1) ... [2023-08-23 22:48:54,574 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:48:54,901 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-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2023-08-23 22:48:54,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:48:54,915 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:48:54,948 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-23 22:48:54,950 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-23 22:48:54,960 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-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2023-08-23 22:48:54,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:48:55,010 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:48:55,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55 WrapperNode [2023-08-23 22:48:55,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:48:55,012 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:48:55,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:48:55,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:48:55,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,064 INFO L138 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2023-08-23 22:48:55,064 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:48:55,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:48:55,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:48:55,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:48:55,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,095 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,105 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:48:55,106 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:48:55,106 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:48:55,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:48:55,107 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (1/1) ... [2023-08-23 22:48:55,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:48:55,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:48:55,134 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) [2023-08-23 22:48:55,168 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 [2023-08-23 22:48:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:48:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:48:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:48:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:48:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:48:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:48:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:48:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:48:55,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:48:55,183 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:48:55,310 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:48:55,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:48:55,428 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:48:55,436 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:48:55,436 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-23 22:48:55,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:48:55 BoogieIcfgContainer [2023-08-23 22:48:55,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:48:55,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:48:55,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:48:55,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:48:55,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:48:54" (1/3) ... [2023-08-23 22:48:55,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebc3940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:48:55, skipping insertion in model container [2023-08-23 22:48:55,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:55" (2/3) ... [2023-08-23 22:48:55,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebc3940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:48:55, skipping insertion in model container [2023-08-23 22:48:55,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:48:55" (3/3) ... [2023-08-23 22:48:55,449 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-08-23 22:48:55,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:48:55,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:48:55,464 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:48:55,539 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:48:55,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 67 transitions, 139 flow [2023-08-23 22:48:55,614 INFO L124 PetriNetUnfolderBase]: 10/77 cut-off events. [2023-08-23 22:48:55,615 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:48:55,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 10/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-23 22:48:55,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 67 transitions, 139 flow [2023-08-23 22:48:55,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 67 transitions, 139 flow [2023-08-23 22:48:55,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:48:55,635 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 67 transitions, 139 flow [2023-08-23 22:48:55,637 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 67 transitions, 139 flow [2023-08-23 22:48:55,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 67 transitions, 139 flow [2023-08-23 22:48:55,655 INFO L124 PetriNetUnfolderBase]: 10/77 cut-off events. [2023-08-23 22:48:55,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:48:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 10/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-23 22:48:55,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 1118 [2023-08-23 22:48:57,144 INFO L134 LiptonReduction]: Checked pairs total: 902 [2023-08-23 22:48:57,145 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-23 22:48:57,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:48:57,171 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;@77bc5a82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:48:57,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 22:48:57,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:48:57,177 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-23 22:48:57,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:48:57,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:48:57,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 22:48:57,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 22:48:57,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:48:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash 428581442, now seen corresponding path program 1 times [2023-08-23 22:48:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:48:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7206684] [2023-08-23 22:48:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:48:57,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:48:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:57,295 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:48:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:57,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:48:57,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:48:57,348 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-23 22:48:57,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-23 22:48:57,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-23 22:48:57,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:48:57,351 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-23 22:48:57,355 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:48:57,356 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:48:57,398 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:48:57,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 111 transitions, 234 flow [2023-08-23 22:48:57,452 INFO L124 PetriNetUnfolderBase]: 19/133 cut-off events. [2023-08-23 22:48:57,452 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:48:57,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 19/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 268 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-23 22:48:57,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 111 transitions, 234 flow [2023-08-23 22:48:57,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 111 transitions, 234 flow [2023-08-23 22:48:57,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:48:57,457 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 111 transitions, 234 flow [2023-08-23 22:48:57,457 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 111 transitions, 234 flow [2023-08-23 22:48:57,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 111 transitions, 234 flow [2023-08-23 22:48:57,484 INFO L124 PetriNetUnfolderBase]: 19/133 cut-off events. [2023-08-23 22:48:57,485 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:48:57,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 19/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 268 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-23 22:48:57,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 6020 [2023-08-23 22:48:59,699 INFO L134 LiptonReduction]: Checked pairs total: 4465 [2023-08-23 22:48:59,700 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-23 22:48:59,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:48:59,703 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;@77bc5a82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:48:59,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 22:48:59,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:48:59,705 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-23 22:48:59,705 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:48:59,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:48:59,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:48:59,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 22:48:59,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:48:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -826650690, now seen corresponding path program 1 times [2023-08-23 22:48:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:48:59,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620411140] [2023-08-23 22:48:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:48:59,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:48:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:59,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:48:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:59,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:48:59,778 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:48:59,779 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-23 22:48:59,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 22:48:59,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-23 22:48:59,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 22:48:59,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:48:59,780 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-23 22:48:59,783 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-23 22:48:59,783 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:48:59,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:48:59 BasicIcfg [2023-08-23 22:48:59,801 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:48:59,802 INFO L158 Benchmark]: Toolchain (without parser) took 5289.71ms. Allocated memory was 335.5MB in the beginning and 423.6MB in the end (delta: 88.1MB). Free memory was 310.4MB in the beginning and 323.5MB in the end (delta: -13.1MB). Peak memory consumption was 76.7MB. Max. memory is 16.0GB. [2023-08-23 22:48:59,803 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 335.5MB. Free memory was 312.4MB in the beginning and 312.4MB in the end (delta: 80.5kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:48:59,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 496.00ms. Allocated memory is still 335.5MB. Free memory was 310.4MB in the beginning and 291.2MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-23 22:48:59,804 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.09ms. Allocated memory is still 335.5MB. Free memory was 291.2MB in the beginning and 289.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:48:59,804 INFO L158 Benchmark]: Boogie Preprocessor took 40.16ms. Allocated memory is still 335.5MB. Free memory was 289.4MB in the beginning and 288.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:48:59,804 INFO L158 Benchmark]: RCFGBuilder took 331.88ms. Allocated memory is still 335.5MB. Free memory was 288.0MB in the beginning and 275.1MB in the end (delta: 12.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-23 22:48:59,805 INFO L158 Benchmark]: TraceAbstraction took 4357.07ms. Allocated memory was 335.5MB in the beginning and 423.6MB in the end (delta: 88.1MB). Free memory was 274.3MB in the beginning and 323.5MB in the end (delta: -49.2MB). Peak memory consumption was 41.0MB. Max. memory is 16.0GB. [2023-08-23 22:48:59,814 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 335.5MB. Free memory was 312.4MB in the beginning and 312.4MB in the end (delta: 80.5kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 496.00ms. Allocated memory is still 335.5MB. Free memory was 310.4MB in the beginning and 291.2MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.09ms. Allocated memory is still 335.5MB. Free memory was 291.2MB in the beginning and 289.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.16ms. Allocated memory is still 335.5MB. Free memory was 289.4MB in the beginning and 288.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 331.88ms. Allocated memory is still 335.5MB. Free memory was 288.0MB in the beginning and 275.1MB in the end (delta: 12.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4357.07ms. Allocated memory was 335.5MB in the beginning and 423.6MB in the end (delta: 88.1MB). Free memory was 274.3MB in the beginning and 323.5MB in the end (delta: -49.2MB). Peak memory consumption was 41.0MB. 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: 1.5s, 61 PlacesBefore, 15 PlacesAfterwards, 67 TransitionsBefore, 17 TransitionsAfterwards, 1118 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 4 ChoiceCompositions, 57 TotalNumberOfCompositions, 902 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 902, independent: 902, independent conditional: 0, independent unconditional: 902, 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: 550, independent: 550, independent conditional: 0, independent unconditional: 550, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 902, independent: 352, independent conditional: 0, independent unconditional: 352, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 550, unknown conditional: 0, unknown unconditional: 550] , 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: 2.2s, 99 PlacesBefore, 25 PlacesAfterwards, 111 TransitionsBefore, 30 TransitionsAfterwards, 6020 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 7 ChoiceCompositions, 94 TotalNumberOfCompositions, 4465 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4465, independent: 4465, independent conditional: 0, independent unconditional: 4465, 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: 2902, independent: 2902, independent conditional: 0, independent unconditional: 2902, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4465, independent: 1563, independent conditional: 0, independent unconditional: 1563, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 2902, unknown conditional: 0, unknown unconditional: 2902] , 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: 695]: a call to reach_error is reachable a call to reach_error is reachable 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 [arg={0:0}, 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