/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_Bitvector.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-24 21:03:09,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-24 21:03:09,805 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-24 21:03:09,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-24 21:03:09,810 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-24 21:03:09,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-24 21:03:09,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-24 21:03:09,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-24 21:03:09,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-24 21:03:09,852 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-24 21:03:09,852 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-24 21:03:09,852 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-24 21:03:09,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-24 21:03:09,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-24 21:03:09,854 INFO L153 SettingsManager]: * Use SBE=true [2023-12-24 21:03:09,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-24 21:03:09,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-24 21:03:09,855 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-24 21:03:09,855 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-24 21:03:09,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-24 21:03:09,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-24 21:03:09,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-24 21:03:09,857 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-24 21:03:09,857 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-24 21:03:09,857 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-24 21:03:09,857 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-24 21:03:09,857 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-24 21:03:09,857 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-24 21:03:09,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-24 21:03:09,858 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-24 21:03:09,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-24 21:03:09,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-24 21:03:09,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-24 21:03:09,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-24 21:03:09,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 21:03:09,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-24 21:03:09,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-24 21:03:09,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-24 21:03:09,861 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-24 21:03:09,861 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-24 21:03:09,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-24 21:03:09,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-24 21:03:09,861 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-24 21:03:09,861 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-24 21:03:09,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-24 21:03:09,862 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-24 21:03:09,862 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-24 21:03:10,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-24 21:03:10,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-24 21:03:10,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-24 21:03:10,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-24 21:03:10,132 INFO L274 PluginConnector]: CDTParser initialized [2023-12-24 21:03:10,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i [2023-12-24 21:03:11,246 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-24 21:03:11,479 INFO L384 CDTParser]: Found 1 translation units. [2023-12-24 21:03:11,479 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i [2023-12-24 21:03:11,492 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09abb2f1f/947752312a6049ba83ced5495ffd5a4e/FLAGd28f607f1 [2023-12-24 21:03:11,511 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09abb2f1f/947752312a6049ba83ced5495ffd5a4e [2023-12-24 21:03:11,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-24 21:03:11,515 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-24 21:03:11,518 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-24 21:03:11,518 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-24 21:03:11,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-24 21:03:11,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:11,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44dc66b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11, skipping insertion in model container [2023-12-24 21:03:11,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:11,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-24 21:03:11,880 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22365,22378] [2023-12-24 21:03:11,886 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22471,22484] [2023-12-24 21:03:11,889 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22595,22608] [2023-12-24 21:03:11,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 21:03:11,912 INFO L202 MainTranslator]: Completed pre-run [2023-12-24 21:03:11,956 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22365,22378] [2023-12-24 21:03:11,958 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22471,22484] [2023-12-24 21:03:11,960 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22595,22608] [2023-12-24 21:03:11,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 21:03:11,993 INFO L206 MainTranslator]: Completed translation [2023-12-24 21:03:11,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11 WrapperNode [2023-12-24 21:03:11,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-24 21:03:11,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-24 21:03:11,995 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-24 21:03:11,995 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-24 21:03:12,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,063 INFO L138 Inliner]: procedures = 122, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-12-24 21:03:12,063 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-24 21:03:12,064 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-24 21:03:12,064 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-24 21:03:12,064 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-24 21:03:12,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,084 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,114 INFO L175 MemorySlicer]: Split 22 memory accesses to 2 slices as follows [2, 20]. 91 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2023-12-24 21:03:12,115 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,115 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,134 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-24 21:03:12,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-24 21:03:12,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-24 21:03:12,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-24 21:03:12,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (1/1) ... [2023-12-24 21:03:12,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 21:03:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-24 21:03:12,190 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) [2023-12-24 21:03:12,215 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 [2023-12-24 21:03:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-24 21:03:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-24 21:03:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-24 21:03:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-24 21:03:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-24 21:03:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-24 21:03:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-24 21:03:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-24 21:03:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-24 21:03:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-24 21:03:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-24 21:03:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-24 21:03:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-24 21:03:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-24 21:03:12,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-24 21:03:12,344 INFO L241 CfgBuilder]: Building ICFG [2023-12-24 21:03:12,346 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-24 21:03:12,631 INFO L282 CfgBuilder]: Performing block encoding [2023-12-24 21:03:12,678 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-24 21:03:12,678 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-24 21:03:12,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 09:03:12 BoogieIcfgContainer [2023-12-24 21:03:12,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-24 21:03:12,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-24 21:03:12,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-24 21:03:12,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-24 21:03:12,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.12 09:03:11" (1/3) ... [2023-12-24 21:03:12,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775e5a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 09:03:12, skipping insertion in model container [2023-12-24 21:03:12,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 09:03:11" (2/3) ... [2023-12-24 21:03:12,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775e5a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 09:03:12, skipping insertion in model container [2023-12-24 21:03:12,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 09:03:12" (3/3) ... [2023-12-24 21:03:12,686 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2023-12-24 21:03:12,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-24 21:03:12,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-12-24 21:03:12,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-24 21:03:12,777 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;@5fcbf25e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-24 21:03:12,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-24 21:03:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-24 21:03:12,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 21:03:12,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-24 21:03:12,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 21:03:12,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 21:03:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash 149304739, now seen corresponding path program 1 times [2023-12-24 21:03:12,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 21:03:12,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778454751] [2023-12-24 21:03:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 21:03:12,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:12,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 21:03:12,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 21:03:12,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-24 21:03:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 21:03:12,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-24 21:03:12,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 21:03:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 21:03:12,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 21:03:12,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 21:03:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778454751] [2023-12-24 21:03:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778454751] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 21:03:12,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 21:03:12,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-24 21:03:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451174660] [2023-12-24 21:03:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 21:03:12,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-24 21:03:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 21:03:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-24 21:03:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 21:03:12,955 INFO L87 Difference]: Start difference. First operand has 30 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 21:03:13,004 INFO L93 Difference]: Finished difference Result 59 states and 95 transitions. [2023-12-24 21:03:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-24 21:03:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-24 21:03:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 21:03:13,011 INFO L225 Difference]: With dead ends: 59 [2023-12-24 21:03:13,012 INFO L226 Difference]: Without dead ends: 25 [2023-12-24 21:03:13,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 21:03:13,017 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 21:03:13,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 21:03:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-24 21:03:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-24 21:03:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-12-24 21:03:13,044 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 5 [2023-12-24 21:03:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 21:03:13,044 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-12-24 21:03:13,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-12-24 21:03:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-24 21:03:13,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 21:03:13,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-24 21:03:13,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-24 21:03:13,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:13,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 21:03:13,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 21:03:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash 292511250, now seen corresponding path program 1 times [2023-12-24 21:03:13,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 21:03:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579147000] [2023-12-24 21:03:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 21:03:13,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 21:03:13,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 21:03:13,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-24 21:03:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 21:03:13,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-24 21:03:13,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 21:03:13,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-24 21:03:13,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-24 21:03:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 21:03:13,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 21:03:13,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 21:03:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579147000] [2023-12-24 21:03:13,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579147000] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 21:03:13,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 21:03:13,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-24 21:03:13,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779310575] [2023-12-24 21:03:13,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 21:03:13,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-24 21:03:13,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 21:03:13,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-24 21:03:13,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-24 21:03:13,584 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 21:03:13,767 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-12-24 21:03:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-24 21:03:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-24 21:03:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 21:03:13,769 INFO L225 Difference]: With dead ends: 41 [2023-12-24 21:03:13,769 INFO L226 Difference]: Without dead ends: 37 [2023-12-24 21:03:13,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-24 21:03:13,771 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-24 21:03:13,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 43 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-24 21:03:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-24 21:03:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2023-12-24 21:03:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-12-24 21:03:13,777 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 6 [2023-12-24 21:03:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 21:03:13,777 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-12-24 21:03:13,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-12-24 21:03:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-24 21:03:13,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 21:03:13,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 21:03:13,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-24 21:03:13,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:13,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 21:03:13,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 21:03:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash 393679078, now seen corresponding path program 1 times [2023-12-24 21:03:13,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 21:03:13,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575484097] [2023-12-24 21:03:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 21:03:13,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:13,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 21:03:13,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 21:03:13,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-24 21:03:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 21:03:14,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-24 21:03:14,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 21:03:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 21:03:14,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 21:03:14,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 21:03:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575484097] [2023-12-24 21:03:14,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575484097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 21:03:14,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 21:03:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-24 21:03:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005927195] [2023-12-24 21:03:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 21:03:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-24 21:03:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 21:03:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-24 21:03:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 21:03:14,095 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 21:03:14,151 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-12-24 21:03:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-24 21:03:14,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-24 21:03:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 21:03:14,153 INFO L225 Difference]: With dead ends: 70 [2023-12-24 21:03:14,153 INFO L226 Difference]: Without dead ends: 48 [2023-12-24 21:03:14,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 21:03:14,155 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 21:03:14,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 21:03:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-24 21:03:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-12-24 21:03:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-12-24 21:03:14,161 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 9 [2023-12-24 21:03:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 21:03:14,162 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-12-24 21:03:14,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 21:03:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-12-24 21:03:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-24 21:03:14,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 21:03:14,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 21:03:14,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-24 21:03:14,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:14,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 21:03:14,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 21:03:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -659012930, now seen corresponding path program 1 times [2023-12-24 21:03:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 21:03:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117089096] [2023-12-24 21:03:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 21:03:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:14,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 21:03:14,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 21:03:14,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-24 21:03:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-24 21:03:14,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-24 21:03:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-24 21:03:14,543 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-12-24 21:03:14,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-24 21:03:14,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-12-24 21:03:14,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-12-24 21:03:14,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-12-24 21:03:14,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-24 21:03:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:03:14,750 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-24 21:03:14,753 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-24 21:03:14,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.12 09:03:14 BoogieIcfgContainer [2023-12-24 21:03:14,770 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-24 21:03:14,771 INFO L158 Benchmark]: Toolchain (without parser) took 3255.96ms. Allocated memory is still 289.4MB. Free memory was 238.7MB in the beginning and 183.8MB in the end (delta: 54.9MB). Peak memory consumption was 56.5MB. Max. memory is 8.0GB. [2023-12-24 21:03:14,771 INFO L158 Benchmark]: CDTParser took 0.52ms. Allocated memory is still 177.2MB. Free memory was 128.5MB in the beginning and 128.4MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-24 21:03:14,771 INFO L158 Benchmark]: CACSL2BoogieTranslator took 476.13ms. Allocated memory is still 289.4MB. Free memory was 238.3MB in the beginning and 219.1MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-24 21:03:14,772 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.20ms. Allocated memory is still 289.4MB. Free memory was 219.1MB in the beginning and 217.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-24 21:03:14,772 INFO L158 Benchmark]: Boogie Preprocessor took 85.31ms. Allocated memory is still 289.4MB. Free memory was 217.0MB in the beginning and 214.2MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-24 21:03:14,772 INFO L158 Benchmark]: RCFGBuilder took 529.12ms. Allocated memory is still 289.4MB. Free memory was 213.9MB in the beginning and 196.4MB in the end (delta: 17.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-24 21:03:14,773 INFO L158 Benchmark]: TraceAbstraction took 2089.26ms. Allocated memory is still 289.4MB. Free memory was 195.7MB in the beginning and 183.8MB in the end (delta: 11.9MB). Peak memory consumption was 13.5MB. Max. memory is 8.0GB. [2023-12-24 21:03:14,774 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52ms. Allocated memory is still 177.2MB. Free memory was 128.5MB in the beginning and 128.4MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 476.13ms. Allocated memory is still 289.4MB. Free memory was 238.3MB in the beginning and 219.1MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 68.20ms. Allocated memory is still 289.4MB. Free memory was 219.1MB in the beginning and 217.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 85.31ms. Allocated memory is still 289.4MB. Free memory was 217.0MB in the beginning and 214.2MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 529.12ms. Allocated memory is still 289.4MB. Free memory was 213.9MB in the beginning and 196.4MB in the end (delta: 17.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 2089.26ms. Allocated memory is still 289.4MB. Free memory was 195.7MB in the beginning and 183.8MB in the end (delta: 11.9MB). Peak memory consumption was 13.5MB. 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: 1034]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->data = 0 [L1001] SLL* x = head; [L1002] int state = 1; VAL [head={6:0}, state=1, x={6:0}] [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1027] x->data = state [L1029] EXPR head->next [L1029] x = head->next [L1030] COND FALSE !(!(((void*)0) != x)) VAL [head={6:0}, state=1, x={6:0}] [L1032] EXPR x->data [L1032] COND TRUE x->data != 0 [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={6:0}, state=1, x={6:0}] [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] EXPR x->data [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={6:0}, state=1, x={6:0}] [L1034] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1034] reach_error() VAL [head={6:0}, state=1, x={6:0}] - UnprovableResult [Line: 1025]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 42 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 122 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 46 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39 IncrementalHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 76 mSDtfsCounter, 39 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 88 SizeOfPredicates, 3 NumberOfNonLiveVariables, 190 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-24 21:03:14,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...