/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 03:11:47,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 03:11:47,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 03:11:47,882 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 03:11:47,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 03:11:47,904 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 03:11:47,905 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 03:11:47,905 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 03:11:47,906 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 03:11:47,909 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 03:11:47,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 03:11:47,909 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 03:11:47,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 03:11:47,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 03:11:47,911 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 03:11:47,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 03:11:47,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 03:11:47,912 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 03:11:47,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 03:11:47,913 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 03:11:47,913 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 03:11:47,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 03:11:47,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 03:11:47,914 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 03:11:47,914 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 03:11:47,914 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 03:11:47,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 03:11:47,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 03:11:47,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 03:11:47,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 03:11:47,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 03:11:47,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 03:11:47,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:11:47,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 03:11:47,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 03:11:47,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 03:11:47,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 03:11:47,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 03:11:47,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 03:11:47,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 03:11:47,917 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 03:11:47,917 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 03:11:47,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 03:11:47,918 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 03:11:48,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 03:11:48,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 03:11:48,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 03:11:48,113 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 03:11:48,113 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 03:11:48,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2023-12-21 03:11:49,205 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 03:11:49,368 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 03:11:49,370 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2023-12-21 03:11:49,375 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e638d759/0cd8f164957a4a2fb29f199aa4467112/FLAGe45040b90 [2023-12-21 03:11:49,388 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e638d759/0cd8f164957a4a2fb29f199aa4467112 [2023-12-21 03:11:49,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 03:11:49,390 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 03:11:49,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 03:11:49,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 03:11:49,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 03:11:49,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c51728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49, skipping insertion in model container [2023-12-21 03:11:49,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,412 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 03:11:49,522 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i[293,306] [2023-12-21 03:11:49,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:11:49,539 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 03:11:49,546 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i[293,306] [2023-12-21 03:11:49,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:11:49,557 INFO L206 MainTranslator]: Completed translation [2023-12-21 03:11:49,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49 WrapperNode [2023-12-21 03:11:49,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 03:11:49,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 03:11:49,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 03:11:49,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 03:11:49,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,568 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,579 INFO L138 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 15 [2023-12-21 03:11:49,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 03:11:49,580 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 03:11:49,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 03:11:49,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 03:11:49,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,595 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-12-21 03:11:49,595 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,608 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 03:11:49,609 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 03:11:49,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 03:11:49,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 03:11:49,610 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (1/1) ... [2023-12-21 03:11:49,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:11:49,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:11:49,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 03:11:49,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 03:11:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 03:11:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure err [2023-12-21 03:11:49,677 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2023-12-21 03:11:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 03:11:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 03:11:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 03:11:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 03:11:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 03:11:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-21 03:11:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-21 03:11:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 03:11:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 03:11:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 03:11:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 03:11:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 03:11:49,725 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 03:11:49,727 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 03:11:49,801 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 03:11:49,843 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 03:11:49,843 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-21 03:11:49,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:11:49 BoogieIcfgContainer [2023-12-21 03:11:49,850 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 03:11:49,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 03:11:49,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 03:11:49,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 03:11:49,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:11:49" (1/3) ... [2023-12-21 03:11:49,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b1c81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:11:49, skipping insertion in model container [2023-12-21 03:11:49,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:11:49" (2/3) ... [2023-12-21 03:11:49,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b1c81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:11:49, skipping insertion in model container [2023-12-21 03:11:49,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:11:49" (3/3) ... [2023-12-21 03:11:49,862 INFO L112 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2023-12-21 03:11:49,877 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 03:11:49,877 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 03:11:49,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 03:11:49,917 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=true, 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;@2a3f0eb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 03:11:49,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 03:11:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 03:11:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-21 03:11:49,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:11:49,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-21 03:11:49,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errErr0ASSERT_VIOLATIONERROR_FUNCTION === [errErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:11:49,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:11:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1768638536, now seen corresponding path program 1 times [2023-12-21 03:11:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:11:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728624524] [2023-12-21 03:11:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:11:49,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:11:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:11:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:11:50,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:11:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728624524] [2023-12-21 03:11:50,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728624524] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:11:50,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:11:50,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 03:11:50,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550188226] [2023-12-21 03:11:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:11:50,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 03:11:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:11:50,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 03:11:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 03:11:50,340 INFO L87 Difference]: Start difference. First operand has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:11:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:11:50,421 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-12-21 03:11:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 03:11:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-21 03:11:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:11:50,426 INFO L225 Difference]: With dead ends: 26 [2023-12-21 03:11:50,426 INFO L226 Difference]: Without dead ends: 12 [2023-12-21 03:11:50,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 03:11:50,432 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:11:50,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:11:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-21 03:11:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-21 03:11:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 03:11:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2023-12-21 03:11:50,454 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 6 [2023-12-21 03:11:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:11:50,454 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2023-12-21 03:11:50,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:11:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2023-12-21 03:11:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 03:11:50,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:11:50,456 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:11:50,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 03:11:50,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errErr0ASSERT_VIOLATIONERROR_FUNCTION === [errErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:11:50,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:11:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -280573174, now seen corresponding path program 1 times [2023-12-21 03:11:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:11:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262999443] [2023-12-21 03:11:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:11:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:11:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 03:11:50,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-21 03:11:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 03:11:50,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-21 03:11:50,507 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-21 03:11:50,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location errErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 03:11:50,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 03:11:50,513 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-21 03:11:50,515 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 03:11:50,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 03:11:50 BoogieIcfgContainer [2023-12-21 03:11:50,528 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 03:11:50,528 INFO L158 Benchmark]: Toolchain (without parser) took 1137.78ms. Allocated memory is still 216.0MB. Free memory was 177.1MB in the beginning and 179.7MB in the end (delta: -2.5MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 03:11:50,528 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 216.0MB. Free memory is still 174.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 03:11:50,529 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.80ms. Allocated memory is still 216.0MB. Free memory was 176.8MB in the beginning and 166.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 03:11:50,529 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.61ms. Allocated memory is still 216.0MB. Free memory was 166.5MB in the beginning and 165.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 03:11:50,529 INFO L158 Benchmark]: Boogie Preprocessor took 29.03ms. Allocated memory is still 216.0MB. Free memory was 165.2MB in the beginning and 163.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 03:11:50,530 INFO L158 Benchmark]: RCFGBuilder took 240.63ms. Allocated memory is still 216.0MB. Free memory was 163.5MB in the beginning and 153.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 03:11:50,530 INFO L158 Benchmark]: TraceAbstraction took 674.83ms. Allocated memory is still 216.0MB. Free memory was 152.7MB in the beginning and 179.7MB in the end (delta: -27.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 03:11:50,545 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 216.0MB. Free memory is still 174.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 165.80ms. Allocated memory is still 216.0MB. Free memory was 176.8MB in the beginning and 166.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.61ms. Allocated memory is still 216.0MB. Free memory was 166.5MB in the beginning and 165.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.03ms. Allocated memory is still 216.0MB. Free memory was 165.2MB in the beginning and 163.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 240.63ms. Allocated memory is still 216.0MB. Free memory was 163.5MB in the beginning and 153.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 674.83ms. Allocated memory is still 216.0MB. Free memory was 152.7MB in the beginning and 179.7MB in the end (delta: -27.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int m; [L33] m = 0 [L35] CALL mutex_lock(&m) VAL [a={5:0}] [L20] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L20] COND FALSE !(*a == 1) [L21] *a = 1 [L35] RET mutex_lock(&m) VAL [m={5:0}] [L39] CALL mutex_lock(&m) VAL [a={5:0}] [L20] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L20] COND TRUE *a == 1 [L20] CALL err() [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22 IncrementalHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 7 mSDtfsCounter, 22 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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! [2023-12-21 03:11:50,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...