/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:30:23,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:30:23,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:30:23,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:30:23,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:30:23,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:30:23,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:30:23,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:30:23,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:30:23,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:30:23,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:30:23,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:30:23,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:30:23,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:30:23,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:30:23,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:30:23,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:30:23,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:30:23,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:30:23,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:30:23,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:30:23,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:30:23,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:30:23,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:30:23,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 05:30:23,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:30:23,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:30:23,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:30:23,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 05:30:24,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:30:24,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:30:24,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:30:24,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:30:24,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:30:24,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:30:24,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:30:24,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:30:24,026 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:30:24,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:30:24,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:30:24,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:30:24,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:30:24,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:30:24,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:30:24,028 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:30:24,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:30:24,029 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:30:24,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:30:24,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:30:24,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:30:24,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:30:24,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:30:24,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:30:24,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:30:24,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:30:24,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:30:24,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:30:24,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:30:24,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:30:24,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:30:24,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:30:24,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:30:24,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:30:24,512 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:30:24,513 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:30:24,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2022-10-16 05:30:24,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f175aec5/94867bf77e3b48a58eba34b9cb574785/FLAG5eacc20ca [2022-10-16 05:30:25,288 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:30:25,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2022-10-16 05:30:25,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f175aec5/94867bf77e3b48a58eba34b9cb574785/FLAG5eacc20ca [2022-10-16 05:30:25,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f175aec5/94867bf77e3b48a58eba34b9cb574785 [2022-10-16 05:30:25,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:30:25,666 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:30:25,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:30:25,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:30:25,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:30:25,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:30:25" (1/1) ... [2022-10-16 05:30:25,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41fdad29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:25, skipping insertion in model container [2022-10-16 05:30:25,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:30:25" (1/1) ... [2022-10-16 05:30:25,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:30:25,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:30:25,925 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2022-10-16 05:30:25,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:30:25,967 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:30:25,988 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2022-10-16 05:30:26,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:30:26,034 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:30:26,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26 WrapperNode [2022-10-16 05:30:26,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:30:26,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:30:26,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:30:26,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:30:26,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,100 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-10-16 05:30:26,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:30:26,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:30:26,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:30:26,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:30:26,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,163 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:30:26,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:30:26,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:30:26,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:30:26,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (1/1) ... [2022-10-16 05:30:26,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:30:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:26,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 05:30:26,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 05:30:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:30:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:30:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:30:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:30:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:30:26,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:30:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:30:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:30:26,389 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:30:26,393 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:30:26,678 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:30:26,700 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:30:26,701 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 05:30:26,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:30:26 BoogieIcfgContainer [2022-10-16 05:30:26,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:30:26,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:30:26,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:30:26,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:30:26,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:30:25" (1/3) ... [2022-10-16 05:30:26,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f9c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:30:26, skipping insertion in model container [2022-10-16 05:30:26,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:30:26" (2/3) ... [2022-10-16 05:30:26,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f9c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:30:26, skipping insertion in model container [2022-10-16 05:30:26,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:30:26" (3/3) ... [2022-10-16 05:30:26,740 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2022-10-16 05:30:26,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:30:26,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-10-16 05:30:26,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:30:26,914 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@178d1d6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:30:26,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-10-16 05:30:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.75) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:30:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:30:26,936 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:26,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:30:26,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 05:30:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:26,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414418728] [2022-10-16 05:30:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:26,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:30:27,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:27,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414418728] [2022-10-16 05:30:27,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414418728] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:30:27,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:30:27,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:30:27,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063047640] [2022-10-16 05:30:27,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:30:27,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:30:27,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:27,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:30:27,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:30:27,397 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.75) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-10-16 05:30:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:27,451 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-10-16 05:30:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:30:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-10-16 05:30:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:27,465 INFO L225 Difference]: With dead ends: 31 [2022-10-16 05:30:27,466 INFO L226 Difference]: Without dead ends: 29 [2022-10-16 05:30:27,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:30:27,474 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:27,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 26 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:30:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-16 05:30:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-16 05:30:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 28 states have internal predecessors, (32), 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) [2022-10-16 05:30:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-10-16 05:30:27,516 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 4 [2022-10-16 05:30:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:27,517 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-10-16 05:30:27,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-10-16 05:30:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-10-16 05:30:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:30:27,518 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:27,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:30:27,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:30:27,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 05:30:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:27,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513506042] [2022-10-16 05:30:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:27,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:30:27,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513506042] [2022-10-16 05:30:27,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513506042] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:30:27,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:30:27,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:30:27,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412067878] [2022-10-16 05:30:27,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:30:27,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:30:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:30:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:30:27,672 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-10-16 05:30:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:27,708 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-10-16 05:30:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:30:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-10-16 05:30:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:27,710 INFO L225 Difference]: With dead ends: 33 [2022-10-16 05:30:27,711 INFO L226 Difference]: Without dead ends: 33 [2022-10-16 05:30:27,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:30:27,714 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:27,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 47 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:30:27,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-16 05:30:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-10-16 05:30:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.36) internal successors, (34), 30 states have internal predecessors, (34), 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) [2022-10-16 05:30:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-10-16 05:30:27,723 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 4 [2022-10-16 05:30:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:27,723 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-10-16 05:30:27,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-10-16 05:30:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-10-16 05:30:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 05:30:27,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:27,725 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:27,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:30:27,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-16 05:30:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564167481] [2022-10-16 05:30:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:30:27,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564167481] [2022-10-16 05:30:27,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564167481] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97455802] [2022-10-16 05:30:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:27,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:27,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:27,993 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) [2022-10-16 05:30:27,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 05:30:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:30:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:28,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-16 05:30:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:30:28,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:30:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:30:28,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97455802] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:30:28,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:30:28,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 05:30:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471609469] [2022-10-16 05:30:28,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:30:28,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:30:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:30:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:30:28,389 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-10-16 05:30:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:28,535 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-10-16 05:30:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:30:28,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 8 [2022-10-16 05:30:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:28,538 INFO L225 Difference]: With dead ends: 83 [2022-10-16 05:30:28,538 INFO L226 Difference]: Without dead ends: 83 [2022-10-16 05:30:28,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:30:28,541 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:28,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 93 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:30:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-10-16 05:30:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 43. [2022-10-16 05:30:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 42 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) [2022-10-16 05:30:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-10-16 05:30:28,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2022-10-16 05:30:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:28,563 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-10-16 05:30:28,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-10-16 05:30:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-10-16 05:30:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-16 05:30:28,565 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:28,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:28,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:28,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:28,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:28,789 INFO L85 PathProgramCache]: Analyzing trace with hash -144029192, now seen corresponding path program 1 times [2022-10-16 05:30:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:28,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296774322] [2022-10-16 05:30:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:28,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:30:29,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:29,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296774322] [2022-10-16 05:30:29,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296774322] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:30:29,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:30:29,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 05:30:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764841782] [2022-10-16 05:30:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:30:29,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:30:29,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:30:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 05:30:29,068 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-10-16 05:30:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:29,152 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-10-16 05:30:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:30:29,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2022-10-16 05:30:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:29,157 INFO L225 Difference]: With dead ends: 49 [2022-10-16 05:30:29,157 INFO L226 Difference]: Without dead ends: 49 [2022-10-16 05:30:29,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 05:30:29,159 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:29,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:30:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-16 05:30:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-10-16 05:30:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 46 states have internal predecessors, (53), 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) [2022-10-16 05:30:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-10-16 05:30:29,176 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 14 [2022-10-16 05:30:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:29,179 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-10-16 05:30:29,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-10-16 05:30:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-10-16 05:30:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 05:30:29,180 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:29,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:29,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 05:30:29,184 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1153148731, now seen corresponding path program 1 times [2022-10-16 05:30:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:29,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027915423] [2022-10-16 05:30:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:30:29,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027915423] [2022-10-16 05:30:29,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027915423] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161885709] [2022-10-16 05:30:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:29,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:29,320 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) [2022-10-16 05:30:29,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 05:30:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:30:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:30:29,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:30:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:30:29,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161885709] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:30:29,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:30:29,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 05:30:29,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347562299] [2022-10-16 05:30:29,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:30:29,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 05:30:29,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 05:30:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:30:29,512 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-10-16 05:30:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:29,569 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-10-16 05:30:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:30:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 18 [2022-10-16 05:30:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:29,572 INFO L225 Difference]: With dead ends: 55 [2022-10-16 05:30:29,572 INFO L226 Difference]: Without dead ends: 55 [2022-10-16 05:30:29,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:30:29,577 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:29,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 58 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:30:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-16 05:30:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-10-16 05:30:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 53 states have internal predecessors, (59), 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) [2022-10-16 05:30:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-10-16 05:30:29,585 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 18 [2022-10-16 05:30:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:29,586 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-10-16 05:30:29,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-10-16 05:30:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-10-16 05:30:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:30:29,587 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:29,587 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 05:30:29,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:29,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:29,799 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-16 05:30:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:29,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769319739] [2022-10-16 05:30:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:29,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:30:30,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:30,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769319739] [2022-10-16 05:30:30,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769319739] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:30,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967499466] [2022-10-16 05:30:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:30:30,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:30,121 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) [2022-10-16 05:30:30,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 05:30:30,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:30:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:30:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 05:30:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:30,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-16 05:30:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:30:30,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:30:30,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967499466] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:30:30,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:30:30,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-16 05:30:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918121162] [2022-10-16 05:30:30,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:30:30,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:30:30,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:30:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-16 05:30:30,427 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-10-16 05:30:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:30,505 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-10-16 05:30:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:30:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2022-10-16 05:30:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:30,507 INFO L225 Difference]: With dead ends: 53 [2022-10-16 05:30:30,507 INFO L226 Difference]: Without dead ends: 53 [2022-10-16 05:30:30,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-16 05:30:30,509 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:30,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 50 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:30:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-16 05:30:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-10-16 05:30:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1875) internal successors, (57), 52 states have internal predecessors, (57), 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) [2022-10-16 05:30:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-10-16 05:30:30,516 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 20 [2022-10-16 05:30:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-10-16 05:30:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-10-16 05:30:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-10-16 05:30:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-16 05:30:30,518 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:30,518 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:30,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:30,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:30,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 611543879, now seen corresponding path program 2 times [2022-10-16 05:30:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:30,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739598148] [2022-10-16 05:30:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:30,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:30:30,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:30,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739598148] [2022-10-16 05:30:30,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739598148] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:30,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358743472] [2022-10-16 05:30:30,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:30:30,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:30,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:30,978 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) [2022-10-16 05:30:30,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 05:30:31,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:30:31,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:30:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:30:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:30:31,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:30:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:30:31,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358743472] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:30:31,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:30:31,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:30:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335289184] [2022-10-16 05:30:31,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:30:31,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:30:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:30:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:30:31,285 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2022-10-16 05:30:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:31,369 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-10-16 05:30:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:30:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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 34 [2022-10-16 05:30:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:31,371 INFO L225 Difference]: With dead ends: 85 [2022-10-16 05:30:31,371 INFO L226 Difference]: Without dead ends: 85 [2022-10-16 05:30:31,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:30:31,373 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:31,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 92 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:30:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-16 05:30:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-10-16 05:30:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1125) internal successors, (89), 84 states have internal predecessors, (89), 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) [2022-10-16 05:30:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-10-16 05:30:31,382 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 34 [2022-10-16 05:30:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:31,383 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-10-16 05:30:31,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2022-10-16 05:30:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-10-16 05:30:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-16 05:30:31,385 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:31,385 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:31,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:31,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:31,603 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash -505533601, now seen corresponding path program 3 times [2022-10-16 05:30:31,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:31,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769405339] [2022-10-16 05:30:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:31,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:30:32,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769405339] [2022-10-16 05:30:32,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769405339] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827709543] [2022-10-16 05:30:32,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:30:32,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:32,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:32,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:30:32,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 05:30:32,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:30:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:30:32,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:30:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:32,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-16 05:30:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-16 05:30:32,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:30:32,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827709543] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:30:32,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:30:32,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2022-10-16 05:30:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006687863] [2022-10-16 05:30:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:30:32,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 05:30:32,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 05:30:32,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:30:32,449 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-10-16 05:30:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:32,488 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-10-16 05:30:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:30:32,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 66 [2022-10-16 05:30:32,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:32,490 INFO L225 Difference]: With dead ends: 85 [2022-10-16 05:30:32,490 INFO L226 Difference]: Without dead ends: 85 [2022-10-16 05:30:32,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:30:32,492 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:32,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:30:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-16 05:30:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-10-16 05:30:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.077922077922078) internal successors, (83), 79 states have internal predecessors, (83), 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) [2022-10-16 05:30:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-10-16 05:30:32,500 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 66 [2022-10-16 05:30:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:32,500 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-10-16 05:30:32,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-10-16 05:30:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-10-16 05:30:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-16 05:30:32,503 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:32,503 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:32,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:32,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:32,719 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash -486529517, now seen corresponding path program 1 times [2022-10-16 05:30:32,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:32,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278112859] [2022-10-16 05:30:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:32,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-16 05:30:32,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278112859] [2022-10-16 05:30:32,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278112859] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:32,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391958592] [2022-10-16 05:30:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:32,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:32,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:32,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:30:32,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 05:30:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:32,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:30:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:30:33,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:30:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:30:33,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391958592] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:30:33,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:30:33,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 17, 17] total 34 [2022-10-16 05:30:33,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008305463] [2022-10-16 05:30:33,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:30:33,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 05:30:33,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 05:30:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 05:30:33,676 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 34 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 34 states have internal predecessors, (138), 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) [2022-10-16 05:30:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:33,898 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2022-10-16 05:30:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-16 05:30:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 34 states have internal predecessors, (138), 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 68 [2022-10-16 05:30:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:33,901 INFO L225 Difference]: With dead ends: 155 [2022-10-16 05:30:33,901 INFO L226 Difference]: Without dead ends: 155 [2022-10-16 05:30:33,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 05:30:33,903 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:33,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 241 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:30:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-10-16 05:30:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 150. [2022-10-16 05:30:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 147 states have (on average 1.0476190476190477) internal successors, (154), 149 states have internal predecessors, (154), 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) [2022-10-16 05:30:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-10-16 05:30:33,915 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 68 [2022-10-16 05:30:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:33,915 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-10-16 05:30:33,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 34 states have internal predecessors, (138), 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) [2022-10-16 05:30:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-10-16 05:30:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-10-16 05:30:33,918 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:33,918 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:33,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:34,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:34,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash -415461562, now seen corresponding path program 2 times [2022-10-16 05:30:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:34,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123045623] [2022-10-16 05:30:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:34,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2022-10-16 05:30:34,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:34,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123045623] [2022-10-16 05:30:34,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123045623] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:34,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021958218] [2022-10-16 05:30:34,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:30:34,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:34,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:34,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:30:34,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 05:30:34,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:30:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:30:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:30:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:34,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-16 05:30:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1776 trivial. 0 not checked. [2022-10-16 05:30:35,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:30:35,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021958218] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:30:35,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:30:35,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-10-16 05:30:35,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719231976] [2022-10-16 05:30:35,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:30:35,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:30:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:30:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:30:35,226 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-10-16 05:30:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:35,253 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-10-16 05:30:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:30:35,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 136 [2022-10-16 05:30:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:35,259 INFO L225 Difference]: With dead ends: 158 [2022-10-16 05:30:35,259 INFO L226 Difference]: Without dead ends: 158 [2022-10-16 05:30:35,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:30:35,261 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:35,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:30:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-16 05:30:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-10-16 05:30:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 149 states have (on average 1.0469798657718121) internal successors, (156), 151 states have internal predecessors, (156), 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) [2022-10-16 05:30:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-10-16 05:30:35,293 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 136 [2022-10-16 05:30:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:35,294 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-10-16 05:30:35,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-10-16 05:30:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-10-16 05:30:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-10-16 05:30:35,304 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:35,304 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:35,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:35,506 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1080352633, now seen corresponding path program 1 times [2022-10-16 05:30:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:35,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739205281] [2022-10-16 05:30:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:35,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:30:36,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:36,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739205281] [2022-10-16 05:30:36,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739205281] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:36,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577384277] [2022-10-16 05:30:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:36,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:36,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:36,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:30:36,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 05:30:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:37,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:30:37,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:30:37,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:30:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:30:38,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577384277] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:30:38,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:30:38,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-16 05:30:38,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474369779] [2022-10-16 05:30:38,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:30:38,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 05:30:38,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:38,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 05:30:38,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:30:38,674 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 65 states, 65 states have (on average 4.030769230769231) internal successors, (262), 65 states have internal predecessors, (262), 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) [2022-10-16 05:30:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:39,027 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2022-10-16 05:30:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 05:30:39,028 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.030769230769231) internal successors, (262), 65 states have internal predecessors, (262), 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 139 [2022-10-16 05:30:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:39,030 INFO L225 Difference]: With dead ends: 280 [2022-10-16 05:30:39,030 INFO L226 Difference]: Without dead ends: 280 [2022-10-16 05:30:39,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:30:39,033 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 279 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:39,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 156 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:30:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-16 05:30:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-10-16 05:30:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 277 states have (on average 1.0252707581227436) internal successors, (284), 279 states have internal predecessors, (284), 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) [2022-10-16 05:30:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 284 transitions. [2022-10-16 05:30:39,042 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 284 transitions. Word has length 139 [2022-10-16 05:30:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:39,043 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 284 transitions. [2022-10-16 05:30:39,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.030769230769231) internal successors, (262), 65 states have internal predecessors, (262), 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) [2022-10-16 05:30:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 284 transitions. [2022-10-16 05:30:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-10-16 05:30:39,048 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:39,048 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:39,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:39,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-16 05:30:39,262 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash -931198183, now seen corresponding path program 2 times [2022-10-16 05:30:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892014267] [2022-10-16 05:30:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:30:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:30:43,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:30:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892014267] [2022-10-16 05:30:43,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892014267] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:30:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793182915] [2022-10-16 05:30:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:30:43,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:30:43,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:30:43,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 05:30:44,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:30:44,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:30:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:30:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:30:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:30:44,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:30:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:30:50,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793182915] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:30:50,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:30:50,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-16 05:30:50,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222911337] [2022-10-16 05:30:50,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:30:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-16 05:30:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:30:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-16 05:30:50,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:30:50,038 INFO L87 Difference]: Start difference. First operand 280 states and 284 transitions. Second operand has 129 states, 129 states have (on average 4.015503875968992) internal successors, (518), 129 states have internal predecessors, (518), 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) [2022-10-16 05:30:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:30:50,917 INFO L93 Difference]: Finished difference Result 536 states and 540 transitions. [2022-10-16 05:30:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-16 05:30:50,918 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 4.015503875968992) internal successors, (518), 129 states have internal predecessors, (518), 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 267 [2022-10-16 05:30:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:30:50,920 INFO L225 Difference]: With dead ends: 536 [2022-10-16 05:30:50,921 INFO L226 Difference]: Without dead ends: 536 [2022-10-16 05:30:50,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:30:50,927 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 567 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:30:50,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 335 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:30:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-10-16 05:30:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-10-16 05:30:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 533 states have (on average 1.0131332082551594) internal successors, (540), 535 states have internal predecessors, (540), 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) [2022-10-16 05:30:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 540 transitions. [2022-10-16 05:30:50,940 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 540 transitions. Word has length 267 [2022-10-16 05:30:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:30:50,941 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 540 transitions. [2022-10-16 05:30:50,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 4.015503875968992) internal successors, (518), 129 states have internal predecessors, (518), 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) [2022-10-16 05:30:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 540 transitions. [2022-10-16 05:30:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-10-16 05:30:50,952 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:30:50,952 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:30:50,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 05:30:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:30:51,154 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:30:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:30:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -710581671, now seen corresponding path program 3 times [2022-10-16 05:30:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:30:51,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787712588] [2022-10-16 05:30:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:30:51,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:30:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 31632 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:31:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:06,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787712588] [2022-10-16 05:31:06,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787712588] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:06,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178289240] [2022-10-16 05:31:06,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:31:06,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:06,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:06,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:31:06,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 05:31:07,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-16 05:31:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:31:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31632 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2022-10-16 05:31:07,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 31632 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2022-10-16 05:31:07,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178289240] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:07,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:07,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 5, 5] total 135 [2022-10-16 05:31:07,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119540234] [2022-10-16 05:31:07,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-10-16 05:31:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-10-16 05:31:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8283, Invalid=9807, Unknown=0, NotChecked=0, Total=18090 [2022-10-16 05:31:07,555 INFO L87 Difference]: Start difference. First operand 536 states and 540 transitions. Second operand has 135 states, 135 states have (on average 4.037037037037037) internal successors, (545), 135 states have internal predecessors, (545), 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) [2022-10-16 05:31:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:08,419 INFO L93 Difference]: Finished difference Result 567 states and 575 transitions. [2022-10-16 05:31:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-10-16 05:31:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 4.037037037037037) internal successors, (545), 135 states have internal predecessors, (545), 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 523 [2022-10-16 05:31:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:08,425 INFO L225 Difference]: With dead ends: 567 [2022-10-16 05:31:08,425 INFO L226 Difference]: Without dead ends: 567 [2022-10-16 05:31:08,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8283, Invalid=9807, Unknown=0, NotChecked=0, Total=18090 [2022-10-16 05:31:08,428 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 438 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:08,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 383 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:31:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-10-16 05:31:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 564. [2022-10-16 05:31:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 561 states have (on average 1.0196078431372548) internal successors, (572), 563 states have internal predecessors, (572), 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) [2022-10-16 05:31:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 572 transitions. [2022-10-16 05:31:08,440 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 572 transitions. Word has length 523 [2022-10-16 05:31:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:08,441 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 572 transitions. [2022-10-16 05:31:08,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 4.037037037037037) internal successors, (545), 135 states have internal predecessors, (545), 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) [2022-10-16 05:31:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 572 transitions. [2022-10-16 05:31:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-10-16 05:31:08,454 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:08,455 INFO L195 NwaCegarLoop]: trace histogram [127, 127, 127, 127, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:08,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 05:31:08,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 05:31:08,656 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:31:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash 769877482, now seen corresponding path program 4 times [2022-10-16 05:31:08,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:08,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742701090] [2022-10-16 05:31:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:08,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32197 backedges. 0 proven. 32131 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:31:23,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:23,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742701090] [2022-10-16 05:31:23,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742701090] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:23,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669840595] [2022-10-16 05:31:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 05:31:23,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:23,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:23,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:31:23,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 05:31:23,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 05:31:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:23,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-16 05:31:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:23,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-10-16 05:31:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 32197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32181 trivial. 0 not checked. [2022-10-16 05:31:24,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:24,358 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-16 05:31:24,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 11 [2022-10-16 05:31:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 32197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32181 trivial. 0 not checked. [2022-10-16 05:31:24,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669840595] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:24,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:24,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 8, 8] total 137 [2022-10-16 05:31:24,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720979585] [2022-10-16 05:31:24,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:24,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-10-16 05:31:24,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-10-16 05:31:24,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8401, Invalid=10231, Unknown=0, NotChecked=0, Total=18632 [2022-10-16 05:31:24,438 INFO L87 Difference]: Start difference. First operand 564 states and 572 transitions. Second operand has 137 states, 137 states have (on average 3.9854014598540144) internal successors, (546), 137 states have internal predecessors, (546), 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) [2022-10-16 05:31:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:25,793 INFO L93 Difference]: Finished difference Result 627 states and 642 transitions. [2022-10-16 05:31:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-10-16 05:31:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.9854014598540144) internal successors, (546), 137 states have internal predecessors, (546), 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 543 [2022-10-16 05:31:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:25,800 INFO L225 Difference]: With dead ends: 627 [2022-10-16 05:31:25,801 INFO L226 Difference]: Without dead ends: 627 [2022-10-16 05:31:25,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1075 SyntacticMatches, 4 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=8436, Invalid=11870, Unknown=0, NotChecked=0, Total=20306 [2022-10-16 05:31:25,806 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 426 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:25,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 344 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 05:31:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-10-16 05:31:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 595. [2022-10-16 05:31:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 592 states have (on average 1.0287162162162162) internal successors, (609), 594 states have internal predecessors, (609), 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) [2022-10-16 05:31:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 609 transitions. [2022-10-16 05:31:25,822 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 609 transitions. Word has length 543 [2022-10-16 05:31:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:25,823 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 609 transitions. [2022-10-16 05:31:25,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.9854014598540144) internal successors, (546), 137 states have internal predecessors, (546), 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) [2022-10-16 05:31:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 609 transitions. [2022-10-16 05:31:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-10-16 05:31:25,831 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:25,832 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 128, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:25,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 05:31:26,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-16 05:31:26,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:31:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash 444262852, now seen corresponding path program 1 times [2022-10-16 05:31:26,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:26,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134848951] [2022-10-16 05:31:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:26,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32706 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:31:40,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:40,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134848951] [2022-10-16 05:31:40,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134848951] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141049156] [2022-10-16 05:31:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:40,210 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:31:40,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 05:31:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 130 conjunts are in the unsatisfiable core [2022-10-16 05:31:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 32706 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:31:41,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32706 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:32:03,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141049156] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:03,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:03,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2022-10-16 05:32:03,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817988063] [2022-10-16 05:32:03,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:03,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-10-16 05:32:03,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:03,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-10-16 05:32:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:32:03,590 INFO L87 Difference]: Start difference. First operand 595 states and 609 transitions. Second operand has 261 states, 261 states have (on average 4.019157088122605) internal successors, (1049), 261 states have internal predecessors, (1049), 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) [2022-10-16 05:32:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:06,086 INFO L93 Difference]: Finished difference Result 1115 states and 1129 transitions. [2022-10-16 05:32:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-10-16 05:32:06,087 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 4.019157088122605) internal successors, (1049), 261 states have internal predecessors, (1049), 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 549 [2022-10-16 05:32:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:06,093 INFO L225 Difference]: With dead ends: 1115 [2022-10-16 05:32:06,094 INFO L226 Difference]: Without dead ends: 1115 [2022-10-16 05:32:06,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1227 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:32:06,099 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1161 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:06,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 422 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-16 05:32:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-10-16 05:32:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1115. [2022-10-16 05:32:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1112 states have (on average 1.0152877697841727) internal successors, (1129), 1114 states have internal predecessors, (1129), 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) [2022-10-16 05:32:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1129 transitions. [2022-10-16 05:32:06,127 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1129 transitions. Word has length 549 [2022-10-16 05:32:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:06,129 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1129 transitions. [2022-10-16 05:32:06,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 4.019157088122605) internal successors, (1049), 261 states have internal predecessors, (1049), 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) [2022-10-16 05:32:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1129 transitions. [2022-10-16 05:32:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2022-10-16 05:32:06,141 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:06,142 INFO L195 NwaCegarLoop]: trace histogram [258, 258, 258, 258, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:06,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 05:32:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 05:32:06,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 05:32:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1462941314, now seen corresponding path program 2 times [2022-10-16 05:32:06,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:06,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643698410] [2022-10-16 05:32:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:33:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 132936 backedges. 0 proven. 132870 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:33:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:33:12,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643698410] [2022-10-16 05:33:12,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643698410] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:33:12,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857872101] [2022-10-16 05:33:12,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:33:12,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:33:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:33:12,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:33:12,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 05:33:13,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:33:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:33:13,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 3738 conjuncts, 260 conjunts are in the unsatisfiable core [2022-10-16 05:33:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:33:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 132936 backedges. 0 proven. 132870 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:33:14,655 INFO L328 TraceCheckSpWp]: Computing backward predicates...