/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/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 03:24:32,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 03:24:32,081 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 03:24:32,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 03:24:32,086 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 03:24:32,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 03:24:32,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 03:24:32,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 03:24:32,109 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 03:24:32,112 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 03:24:32,112 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 03:24:32,112 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 03:24:32,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 03:24:32,113 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 03:24:32,114 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 03:24:32,114 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 03:24:32,114 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 03:24:32,115 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 03:24:32,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 03:24:32,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 03:24:32,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 03:24:32,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 03:24:32,116 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 03:24:32,116 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 03:24:32,116 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 03:24:32,116 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 03:24:32,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 03:24:32,116 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 03:24:32,117 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 03:24:32,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 03:24:32,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 03:24:32,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 03:24:32,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:24:32,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 03:24:32,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 03:24:32,118 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 03:24:32,118 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 03:24:32,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 03:24:32,119 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 03:24:32,119 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 03:24:32,119 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 03:24:32,119 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 03:24:32,120 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 03:24:32,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 03:24:32,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 03:24:32,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 03:24:32,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 03:24:32,338 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 03:24:32,338 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 03:24:32,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2023-12-21 03:24:33,296 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 03:24:33,494 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 03:24:33,495 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2023-12-21 03:24:33,503 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c9314b6/96f827f7da5a463b90ebda23feb16eb7/FLAG49e391a2b [2023-12-21 03:24:33,514 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c9314b6/96f827f7da5a463b90ebda23feb16eb7 [2023-12-21 03:24:33,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 03:24:33,516 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 03:24:33,517 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 03:24:33,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 03:24:33,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 03:24:33,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d93928e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33, skipping insertion in model container [2023-12-21 03:24:33,521 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,563 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 03:24:33,740 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/sll-rb-sentinel-2.i[22534,22547] [2023-12-21 03:24:33,745 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/sll-rb-sentinel-2.i[22606,22619] [2023-12-21 03:24:33,746 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/sll-rb-sentinel-2.i[22746,22759] [2023-12-21 03:24:33,746 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/sll-rb-sentinel-2.i[22820,22833] [2023-12-21 03:24:33,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:24:33,755 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 03:24:33,802 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/sll-rb-sentinel-2.i[22534,22547] [2023-12-21 03:24:33,813 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/sll-rb-sentinel-2.i[22606,22619] [2023-12-21 03:24:33,813 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/sll-rb-sentinel-2.i[22746,22759] [2023-12-21 03:24:33,814 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/sll-rb-sentinel-2.i[22820,22833] [2023-12-21 03:24:33,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:24:33,832 INFO L206 MainTranslator]: Completed translation [2023-12-21 03:24:33,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33 WrapperNode [2023-12-21 03:24:33,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 03:24:33,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 03:24:33,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 03:24:33,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 03:24:33,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,883 INFO L138 Inliner]: procedures = 119, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 123 [2023-12-21 03:24:33,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 03:24:33,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 03:24:33,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 03:24:33,884 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 03:24:33,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,893 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,903 INFO L175 MemorySlicer]: Split 24 memory accesses to 2 slices as follows [2, 22]. 92 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 11 writes are split as follows [0, 11]. [2023-12-21 03:24:33,903 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,903 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,912 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 03:24:33,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 03:24:33,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 03:24:33,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 03:24:33,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (1/1) ... [2023-12-21 03:24:33,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:24:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:24:33,951 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 03:24:33,956 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 03:24:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 03:24:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 03:24:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 03:24:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 03:24:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 03:24:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 03:24:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-21 03:24:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-21 03:24:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-21 03:24:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-21 03:24:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 03:24:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 03:24:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 03:24:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 03:24:33,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 03:24:34,074 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 03:24:34,075 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 03:24:34,258 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 03:24:34,294 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 03:24:34,294 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-21 03:24:34,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:24:34 BoogieIcfgContainer [2023-12-21 03:24:34,294 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 03:24:34,296 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 03:24:34,296 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 03:24:34,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 03:24:34,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:24:33" (1/3) ... [2023-12-21 03:24:34,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a18258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:24:34, skipping insertion in model container [2023-12-21 03:24:34,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:33" (2/3) ... [2023-12-21 03:24:34,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a18258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:24:34, skipping insertion in model container [2023-12-21 03:24:34,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:24:34" (3/3) ... [2023-12-21 03:24:34,300 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2023-12-21 03:24:34,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 03:24:34,312 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-12-21 03:24:34,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 03:24:34,356 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;@43ba85fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 03:24:34,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-21 03:24:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 25 states have (on average 2.0) internal successors, (50), 29 states have internal predecessors, (50), 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) [2023-12-21 03:24:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-21 03:24:34,364 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:24:34,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-21 03:24:34,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:24:34,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:24:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash 154845866, now seen corresponding path program 1 times [2023-12-21 03:24:34,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:24:34,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406521312] [2023-12-21 03:24:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:24:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:34,550 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 03:24:34,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:24:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406521312] [2023-12-21 03:24:34,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406521312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:24:34,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:24:34,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 03:24:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267051682] [2023-12-21 03:24:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:24:34,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 03:24:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:24:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 03:24:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 03:24:34,577 INFO L87 Difference]: Start difference. First operand has 30 states, 25 states have (on average 2.0) internal successors, (50), 29 states have internal predecessors, (50), 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) [2023-12-21 03:24:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:24:34,604 INFO L93 Difference]: Finished difference Result 56 states and 93 transitions. [2023-12-21 03:24:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 03:24:34,605 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 [2023-12-21 03:24:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:24:34,610 INFO L225 Difference]: With dead ends: 56 [2023-12-21 03:24:34,610 INFO L226 Difference]: Without dead ends: 26 [2023-12-21 03:24:34,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 03:24:34,616 INFO L413 NwaCegarLoop]: 33 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, 33 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 [2023-12-21 03:24:34,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:24:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-21 03:24:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-21 03:24:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 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) [2023-12-21 03:24:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-21 03:24:34,639 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 5 [2023-12-21 03:24:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:24:34,640 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-21 03:24:34,640 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) [2023-12-21 03:24:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-21 03:24:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-21 03:24:34,641 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:24:34,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-21 03:24:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 03:24:34,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:24:34,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:24:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 492885517, now seen corresponding path program 1 times [2023-12-21 03:24:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:24:34,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485760070] [2023-12-21 03:24:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:24:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:34,799 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 03:24:34,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:24:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485760070] [2023-12-21 03:24:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485760070] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:24:34,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:24:34,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 03:24:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759232489] [2023-12-21 03:24:34,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:24:34,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 03:24:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:24:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 03:24:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 03:24:34,807 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2023-12-21 03:24:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:24:34,859 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-12-21 03:24:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 03:24:34,860 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 [2023-12-21 03:24:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:24:34,861 INFO L225 Difference]: With dead ends: 32 [2023-12-21 03:24:34,861 INFO L226 Difference]: Without dead ends: 30 [2023-12-21 03:24:34,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 03:24:34,862 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:24:34,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 25 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:24:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-21 03:24:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-12-21 03:24:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 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) [2023-12-21 03:24:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-12-21 03:24:34,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2023-12-21 03:24:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:24:34,870 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-12-21 03:24:34,870 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) [2023-12-21 03:24:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-12-21 03:24:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 03:24:34,871 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:24:34,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:24:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 03:24:34,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:24:34,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:24:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -936802660, now seen corresponding path program 1 times [2023-12-21 03:24:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:24:34,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963400885] [2023-12-21 03:24:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:34,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:24:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:35,088 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 03:24:35,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:24:35,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963400885] [2023-12-21 03:24:35,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963400885] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:24:35,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:24:35,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 03:24:35,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990286145] [2023-12-21 03:24:35,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:24:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 03:24:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:24:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 03:24:35,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 03:24:35,098 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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) [2023-12-21 03:24:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:24:35,240 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2023-12-21 03:24:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 03:24:35,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 [2023-12-21 03:24:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:24:35,243 INFO L225 Difference]: With dead ends: 56 [2023-12-21 03:24:35,243 INFO L226 Difference]: Without dead ends: 54 [2023-12-21 03:24:35,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 03:24:35,245 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:24:35,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:24:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-21 03:24:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2023-12-21 03:24:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 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) [2023-12-21 03:24:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-12-21 03:24:35,259 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 9 [2023-12-21 03:24:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:24:35,259 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-12-21 03:24:35,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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) [2023-12-21 03:24:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-12-21 03:24:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 03:24:35,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:24:35,260 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:24:35,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 03:24:35,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:24:35,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:24:35,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1923452346, now seen corresponding path program 1 times [2023-12-21 03:24:35,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:24:35,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370500766] [2023-12-21 03:24:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:35,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:24:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:24:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370500766] [2023-12-21 03:24:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370500766] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:24:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896752255] [2023-12-21 03:24:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:35,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:24:35,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:24:35,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:24:35,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 03:24:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:35,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-21 03:24:35,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:24:35,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-21 03:24:35,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:24:35,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 1 [2023-12-21 03:24:35,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:24:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:24:36,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-12-21 03:24:36,034 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-21 03:24:36,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-21 03:24:36,055 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-21 03:24:36,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-21 03:24:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:24:36,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-12-21 03:24:36,097 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-21 03:24:36,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2023-12-21 03:24:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:36,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:24:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:36,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896752255] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:24:36,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:24:36,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-12-21 03:24:36,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160130189] [2023-12-21 03:24:36,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:24:36,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 03:24:36,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:24:36,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 03:24:36,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-21 03:24:36,226 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2023-12-21 03:24:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:24:36,393 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-12-21 03:24:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 03:24:36,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) Word has length 12 [2023-12-21 03:24:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:24:36,394 INFO L225 Difference]: With dead ends: 41 [2023-12-21 03:24:36,394 INFO L226 Difference]: Without dead ends: 39 [2023-12-21 03:24:36,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-12-21 03:24:36,395 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:24:36,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 78 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:24:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-21 03:24:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2023-12-21 03:24:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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) [2023-12-21 03:24:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-21 03:24:36,398 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2023-12-21 03:24:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:24:36,399 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-21 03:24:36,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2023-12-21 03:24:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-21 03:24:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 03:24:36,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:24:36,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:24:36,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 03:24:36,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:24:36,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:24:36,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:24:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -69079933, now seen corresponding path program 1 times [2023-12-21 03:24:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:24:36,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063416704] [2023-12-21 03:24:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:36,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:24:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:36,641 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 03:24:36,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:24:36,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063416704] [2023-12-21 03:24:36,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063416704] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:24:36,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:24:36,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 03:24:36,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883400680] [2023-12-21 03:24:36,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:24:36,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 03:24:36,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:24:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 03:24:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 03:24:36,643 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-12-21 03:24:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:24:36,683 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-12-21 03:24:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 03:24:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2023-12-21 03:24:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:24:36,684 INFO L225 Difference]: With dead ends: 37 [2023-12-21 03:24:36,684 INFO L226 Difference]: Without dead ends: 25 [2023-12-21 03:24:36,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 03:24:36,685 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:24:36,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 55 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:24:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-21 03:24:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-12-21 03:24:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 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) [2023-12-21 03:24:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-12-21 03:24:36,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2023-12-21 03:24:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:24:36,689 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-12-21 03:24:36,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-12-21 03:24:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-12-21 03:24:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 03:24:36,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:24:36,689 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:24:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-21 03:24:36,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:24:36,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:24:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 448129033, now seen corresponding path program 1 times [2023-12-21 03:24:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:24:36,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444410284] [2023-12-21 03:24:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:24:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:24:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444410284] [2023-12-21 03:24:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444410284] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:24:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837542526] [2023-12-21 03:24:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:36,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:24:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:24:36,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:24:36,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 03:24:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:36,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-21 03:24:36,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:24:36,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 35 [2023-12-21 03:24:36,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2023-12-21 03:24:36,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 35 [2023-12-21 03:24:36,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2023-12-21 03:24:36,971 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-12-21 03:24:36,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 78 [2023-12-21 03:24:36,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-12-21 03:24:36,989 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:24:36,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 03:24:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:24:37,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 19 [2023-12-21 03:24:37,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:37,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 110 [2023-12-21 03:24:37,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 45 treesize of output 50 [2023-12-21 03:24:37,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-12-21 03:24:37,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-21 03:24:37,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 17 treesize of output 9 [2023-12-21 03:24:37,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-21 03:24:37,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:24:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:37,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:24:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:37,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837542526] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:24:37,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:24:37,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-21 03:24:37,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419363637] [2023-12-21 03:24:37,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:24:37,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 03:24:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:24:37,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 03:24:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-21 03:24:37,491 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2023-12-21 03:24:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:24:37,867 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-12-21 03:24:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 03:24:37,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 16 [2023-12-21 03:24:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:24:37,868 INFO L225 Difference]: With dead ends: 48 [2023-12-21 03:24:37,868 INFO L226 Difference]: Without dead ends: 26 [2023-12-21 03:24:37,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-12-21 03:24:37,868 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 03:24:37,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 75 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 2 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 03:24:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-21 03:24:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-21 03:24:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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) [2023-12-21 03:24:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-21 03:24:37,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2023-12-21 03:24:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:24:37,872 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-21 03:24:37,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2023-12-21 03:24:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-21 03:24:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 03:24:37,873 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:24:37,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:24:37,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 03:24:38,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-21 03:24:38,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:24:38,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:24:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1096237867, now seen corresponding path program 1 times [2023-12-21 03:24:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:24:38,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619293828] [2023-12-21 03:24:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:38,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:24:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:38,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:24:38,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619293828] [2023-12-21 03:24:38,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619293828] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:24:38,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378594088] [2023-12-21 03:24:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:24:38,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:24:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:24:38,662 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:24:38,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 03:24:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:24:38,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-21 03:24:38,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:24:38,791 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-21 03:24:38,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-12-21 03:24:38,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-12-21 03:24:38,837 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-21 03:24:38,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-21 03:24:38,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-21 03:24:38,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-12-21 03:24:38,857 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-21 03:24:38,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-21 03:24:38,887 INFO L349 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-12-21 03:24:38,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2023-12-21 03:24:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:24:38,943 INFO L349 Elim1Store]: treesize reduction 33, result has 29.8 percent of original size [2023-12-21 03:24:38,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 61 [2023-12-21 03:24:38,955 INFO L349 Elim1Store]: treesize reduction 29, result has 37.0 percent of original size [2023-12-21 03:24:38,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2023-12-21 03:24:38,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:24:38,979 INFO L349 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2023-12-21 03:24:38,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2023-12-21 03:24:39,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-21 03:24:39,181 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-21 03:24:39,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2023-12-21 03:24:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:24:39,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:24:39,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:39,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2023-12-21 03:24:39,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:39,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 65 [2023-12-21 03:24:39,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:39,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 49 [2023-12-21 03:24:39,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:39,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 3444 treesize of output 2309 [2023-12-21 03:24:39,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:39,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 934 treesize of output 830 [2023-12-21 03:24:39,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:39,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 701 treesize of output 635 [2023-12-21 03:24:39,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:24:39,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 540 treesize of output 511 [2023-12-21 03:24:39,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 496 treesize of output 460 [2023-12-21 03:24:39,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 460 treesize of output 442 [2023-12-21 03:25:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:25:04,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378594088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:25:04,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:25:04,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2023-12-21 03:25:04,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799245158] [2023-12-21 03:25:04,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:25:04,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 03:25:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:25:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 03:25:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-12-21 03:25:04,845 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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) [2023-12-21 03:25:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:25:05,845 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2023-12-21 03:25:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 03:25:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 19 [2023-12-21 03:25:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:25:05,847 INFO L225 Difference]: With dead ends: 124 [2023-12-21 03:25:05,847 INFO L226 Difference]: Without dead ends: 122 [2023-12-21 03:25:05,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=1055, Unknown=1, NotChecked=0, Total=1260 [2023-12-21 03:25:05,848 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 227 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 53 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 03:25:05,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 314 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 373 Invalid, 23 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 03:25:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-21 03:25:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 44. [2023-12-21 03:25:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 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) [2023-12-21 03:25:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-12-21 03:25:05,855 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 19 [2023-12-21 03:25:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:25:05,855 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-12-21 03:25:05,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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) [2023-12-21 03:25:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-12-21 03:25:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 03:25:05,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:25:05,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:25:05,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-21 03:25:06,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:25:06,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:25:06,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:25:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2117306221, now seen corresponding path program 1 times [2023-12-21 03:25:06,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:25:06,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538761887] [2023-12-21 03:25:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:25:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:25:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:25:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:25:06,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:25:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538761887] [2023-12-21 03:25:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538761887] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:25:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539197617] [2023-12-21 03:25:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:25:06,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:25:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:25:06,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:25:06,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 03:25:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:25:06,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-21 03:25:06,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:25:06,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-21 03:25:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:25:06,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-21 03:25:06,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-12-21 03:25:06,574 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-21 03:25:06,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-21 03:25:06,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-21 03:25:06,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-12-21 03:25:06,594 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-21 03:25:06,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-21 03:25:06,607 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-21 03:25:06,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-21 03:25:06,620 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-21 03:25:06,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2023-12-21 03:25:06,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2023-12-21 03:25:06,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 03:25:06,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-21 03:25:06,719 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 7 treesize of output 3 [2023-12-21 03:25:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:25:06,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:25:06,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2023-12-21 03:25:06,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:25:06,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-21 03:25:06,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:25:06,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-21 03:25:06,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:25:06,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 47 [2023-12-21 03:25:06,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:25:06,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 53 [2023-12-21 03:25:06,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-12-21 03:25:06,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-12-21 03:25:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:25:06,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539197617] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:25:06,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:25:06,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2023-12-21 03:25:06,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491969349] [2023-12-21 03:25:06,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:25:06,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 03:25:06,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:25:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 03:25:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=320, Unknown=7, NotChecked=0, Total=380 [2023-12-21 03:25:06,941 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2023-12-21 03:25:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:25:07,291 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2023-12-21 03:25:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 03:25:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) Word has length 19 [2023-12-21 03:25:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:25:07,291 INFO L225 Difference]: With dead ends: 83 [2023-12-21 03:25:07,292 INFO L226 Difference]: Without dead ends: 71 [2023-12-21 03:25:07,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=599, Unknown=7, NotChecked=0, Total=756 [2023-12-21 03:25:07,292 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:25:07,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 300 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 03:25:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-21 03:25:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2023-12-21 03:25:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.196078431372549) internal successors, (61), 52 states have internal predecessors, (61), 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) [2023-12-21 03:25:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2023-12-21 03:25:07,300 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 19 [2023-12-21 03:25:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:25:07,301 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2023-12-21 03:25:07,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2023-12-21 03:25:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2023-12-21 03:25:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 03:25:07,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:25:07,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:25:07,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 03:25:07,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:25:07,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-21 03:25:07,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:25:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash -905030899, now seen corresponding path program 1 times [2023-12-21 03:25:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:25:07,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251328921] [2023-12-21 03:25:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:25:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:25:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 03:25:07,538 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-21 03:25:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 03:25:07,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-21 03:25:07,560 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-21 03:25:07,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-12-21 03:25:07,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-12-21 03:25:07,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-12-21 03:25:07,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-12-21 03:25:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-21 03:25:07,564 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:25:07,567 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 03:25:07,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 03:25:07 BoogieIcfgContainer [2023-12-21 03:25:07,582 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 03:25:07,582 INFO L158 Benchmark]: Toolchain (without parser) took 34066.13ms. Allocated memory was 208.7MB in the beginning and 881.9MB in the end (delta: 673.2MB). Free memory was 143.3MB in the beginning and 826.6MB in the end (delta: -683.3MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 03:25:07,583 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 208.7MB. Free memory is still 158.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 03:25:07,583 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.69ms. Allocated memory was 208.7MB in the beginning and 265.3MB in the end (delta: 56.6MB). Free memory was 143.1MB in the beginning and 226.9MB in the end (delta: -83.9MB). Peak memory consumption was 19.4MB. Max. memory is 8.0GB. [2023-12-21 03:25:07,583 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.73ms. Allocated memory is still 265.3MB. Free memory was 226.9MB in the beginning and 224.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 03:25:07,583 INFO L158 Benchmark]: Boogie Preprocessor took 29.97ms. Allocated memory is still 265.3MB. Free memory was 224.8MB in the beginning and 222.2MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-21 03:25:07,583 INFO L158 Benchmark]: RCFGBuilder took 380.46ms. Allocated memory is still 265.3MB. Free memory was 222.2MB in the beginning and 204.4MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-21 03:25:07,583 INFO L158 Benchmark]: TraceAbstraction took 33286.43ms. Allocated memory was 265.3MB in the beginning and 881.9MB in the end (delta: 616.6MB). Free memory was 203.8MB in the beginning and 826.6MB in the end (delta: -622.7MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 03:25:07,584 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 208.7MB. Free memory is still 158.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 315.69ms. Allocated memory was 208.7MB in the beginning and 265.3MB in the end (delta: 56.6MB). Free memory was 143.1MB in the beginning and 226.9MB in the end (delta: -83.9MB). Peak memory consumption was 19.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 49.73ms. Allocated memory is still 265.3MB. Free memory was 226.9MB in the beginning and 224.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.97ms. Allocated memory is still 265.3MB. Free memory was 224.8MB in the beginning and 222.2MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 380.46ms. Allocated memory is still 265.3MB. Free memory was 222.2MB in the beginning and 204.4MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 33286.43ms. Allocated memory was 265.3MB in the beginning and 881.9MB in the end (delta: 616.6MB). Free memory was 203.8MB in the beginning and 826.6MB in the end (delta: -622.7MB). 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: 1050]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); [L1006] null->colour = BLACK [L1007] null->next = ((void*)0) [L1009] SLL* list = malloc(sizeof(SLL)); [L1010] list->next = null [L1011] list->colour = BLACK [L1013] SLL* end = list; VAL [end={-1:0}, list={-1:0}, null={-2:0}] [L1016] COND TRUE __VERIFIER_nondet_int() [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1023] COND FALSE !(__VERIFIER_nondet_int()) [L1029] end->colour = RED [L1030] end->next = malloc(sizeof(SLL)) [L1031] EXPR end->next [L1031] end = end->next [L1032] end->next = null [L1033] end->colour = BLACK [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-1:0}, list={-1:0}, null={-2:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-1:0}, list={-1:0}, null={-2:0}] [L1042] EXPR end->colour [L1042] COND FALSE !(!(BLACK == end->colour)) [L1044] COND TRUE null != end [L1046] EXPR end->colour [L1046] COND FALSE !(RED == end->colour) [L1053] EXPR end->next [L1053] end = end->next [L1044] COND TRUE null != end [L1046] EXPR end->colour [L1046] COND TRUE RED == end->colour [L1048] EXPR end->next [L1048] end = end->next [L1049] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-1:0}, null={-2:0}] [L1050] EXPR end->colour [L1050] COND TRUE !(BLACK != end->colour) [L1050] reach_error() VAL [end={-4:0}, list={-1:0}, null={-2:0}] - UnprovableResult [Line: 1041]: 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: 1042]: 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: 1049]: 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, 4 error locations. Started 1 CEGAR loops. OverallTime: 33.2s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 mSolverCounterUnknown, 457 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 457 mSDsluCounter, 947 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 782 mSDsCounter, 108 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 925 IncrementalHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 108 mSolverCounterUnsat, 165 mSDtfsCounter, 925 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=8, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 140 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 29.2s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 215 ConstructedInterpolants, 22 QuantifiedInterpolants, 4880 SizeOfPredicates, 33 NumberOfNonLiveVariables, 695 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 3/36 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 03:25:07,753 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...