/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_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:32:04,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:32:04,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:32:04,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 05:32:04,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:32:04,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:32:04,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:32:04,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:32:04,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:32:04,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:32:04,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:32:04,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:32:04,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:32:04,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:32:04,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:32:04,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:32:04,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 05:32:04,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:32:04,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:32:04,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:32:04,280 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 05:32:04,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:32:04,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:32:04,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:32:04,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:32:04,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:32:04,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:32:04,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:32:04,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:32:04,323 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:32:04,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:32:04,323 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:32:04,324 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:32:04,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:32:04,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:32:04,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:32:04,324 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:32:04,324 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:32:04,325 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:32:04,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:32:04,325 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:32:04,325 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:32:04,325 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:32:04,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:32:04,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:32:04,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:32:04,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:32:04,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:32:04,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:32:04,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:32:04,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:32:04,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:32:04,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:32:04,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:32:04,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:32:04,694 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:32:04,694 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:32:04,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-10-16 05:32:04,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cc849da/0aa1b9c81fb54311af3911f753565453/FLAGf40faba70 [2022-10-16 05:32:05,404 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:32:05,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-10-16 05:32:05,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cc849da/0aa1b9c81fb54311af3911f753565453/FLAGf40faba70 [2022-10-16 05:32:05,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cc849da/0aa1b9c81fb54311af3911f753565453 [2022-10-16 05:32:05,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:32:05,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:32:05,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:32:05,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:32:05,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:32:05,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:32:05" (1/1) ... [2022-10-16 05:32:05,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f82003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:05, skipping insertion in model container [2022-10-16 05:32:05,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:32:05" (1/1) ... [2022-10-16 05:32:05,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:32:05,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:32:05,943 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_partition_ground-2.i[820,833] [2022-10-16 05:32:05,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:32:05,976 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:32:05,991 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_partition_ground-2.i[820,833] [2022-10-16 05:32:06,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:32:06,016 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:32:06,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06 WrapperNode [2022-10-16 05:32:06,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:32:06,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:32:06,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:32:06,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:32:06,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,084 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-10-16 05:32:06,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:32:06,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:32:06,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:32:06,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:32:06,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:32:06,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:32:06,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:32:06,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:32:06,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (1/1) ... [2022-10-16 05:32:06,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:32:06,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:06,227 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 05:32:06,239 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 05:32:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:32:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:32:06,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:32:06,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:32:06,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:32:06,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:32:06,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:32:06,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:32:06,395 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:32:06,398 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:32:06,775 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:32:06,794 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:32:06,794 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-16 05:32:06,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:32:06 BoogieIcfgContainer [2022-10-16 05:32:06,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:32:06,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:32:06,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:32:06,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:32:06,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:32:05" (1/3) ... [2022-10-16 05:32:06,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74209a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:32:06, skipping insertion in model container [2022-10-16 05:32:06,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:32:06" (2/3) ... [2022-10-16 05:32:06,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74209a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:32:06, skipping insertion in model container [2022-10-16 05:32:06,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:32:06" (3/3) ... [2022-10-16 05:32:06,830 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2022-10-16 05:32:06,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:32:06,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-10-16 05:32:06,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:32:06,950 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;@2328b4c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:32:06,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-10-16 05:32:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.875) internal successors, (60), 49 states have internal predecessors, (60), 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 05:32:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:32:06,991 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:06,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:32:06,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 05:32:07,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:07,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5149637] [2022-10-16 05:32:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:07,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:07,448 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 05:32:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:07,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5149637] [2022-10-16 05:32:07,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5149637] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:32:07,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:32:07,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:32:07,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128551447] [2022-10-16 05:32:07,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:32:07,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:32:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:32:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:32:07,497 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.875) internal successors, (60), 49 states have internal predecessors, (60), 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 05:32:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:07,555 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-10-16 05:32:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:32:07,558 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 05:32:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:07,567 INFO L225 Difference]: With dead ends: 45 [2022-10-16 05:32:07,568 INFO L226 Difference]: Without dead ends: 43 [2022-10-16 05:32:07,570 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 05:32:07,575 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:07,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:32:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-16 05:32:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-10-16 05:32:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.5483870967741935) 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 05:32:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-10-16 05:32:07,619 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 4 [2022-10-16 05:32:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:07,619 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-10-16 05:32:07,619 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 05:32:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-10-16 05:32:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:32:07,620 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:07,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:32:07,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:32:07,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 05:32:07,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:07,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646456277] [2022-10-16 05:32:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:07,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:07,820 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 05:32:07,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:07,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646456277] [2022-10-16 05:32:07,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646456277] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:32:07,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:32:07,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:32:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543745092] [2022-10-16 05:32:07,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:32:07,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:32:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:32:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:32:07,833 INFO L87 Difference]: Start difference. First operand 43 states and 48 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 05:32:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:07,914 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-10-16 05:32:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:32:07,915 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 05:32:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:07,916 INFO L225 Difference]: With dead ends: 47 [2022-10-16 05:32:07,916 INFO L226 Difference]: Without dead ends: 47 [2022-10-16 05:32:07,917 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 05:32:07,919 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:07,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:32:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-16 05:32:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-10-16 05:32:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:32:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-10-16 05:32:07,928 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 4 [2022-10-16 05:32:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:07,928 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-10-16 05:32:07,929 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 05:32:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-10-16 05:32:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 05:32:07,930 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:07,930 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:07,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:32:07,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-16 05:32:07,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:07,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70319120] [2022-10-16 05:32:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:08,132 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 05:32:08,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70319120] [2022-10-16 05:32:08,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70319120] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681755812] [2022-10-16 05:32:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:08,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:08,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:08,146 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 05:32:08,150 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 05:32:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-16 05:32:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:08,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:32:08,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:32:08,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:32:08,396 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 05:32:08,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:08,535 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 05:32:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681755812] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:08,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:08,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 05:32:08,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366360230] [2022-10-16 05:32:08,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:08,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:32:08,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:32:08,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:32:08,541 INFO L87 Difference]: Start difference. First operand 45 states and 50 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 05:32:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:08,761 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2022-10-16 05:32:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:32:08,761 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 05:32:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:08,766 INFO L225 Difference]: With dead ends: 125 [2022-10-16 05:32:08,767 INFO L226 Difference]: Without dead ends: 125 [2022-10-16 05:32:08,771 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 05:32:08,777 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 129 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:08,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 141 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:32:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-10-16 05:32:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 57. [2022-10-16 05:32:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 56 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 05:32:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-10-16 05:32:08,796 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 8 [2022-10-16 05:32:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:08,798 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-10-16 05:32:08,798 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 05:32:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-10-16 05:32:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 05:32:08,799 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:08,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-16 05:32:08,838 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 05:32:09,013 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 05:32:09,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash -4645886, now seen corresponding path program 1 times [2022-10-16 05:32:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361048348] [2022-10-16 05:32:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:09,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:32:09,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361048348] [2022-10-16 05:32:09,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361048348] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083361088] [2022-10-16 05:32:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:09,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:09,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:09,230 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 05:32:09,255 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 05:32:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:32:09,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:32:09,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:32:09,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083361088] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:09,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:09,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-16 05:32:09,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756567750] [2022-10-16 05:32:09,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:09,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 05:32:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 05:32:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-10-16 05:32:09,416 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 05:32:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:09,592 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-10-16 05:32:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 05:32:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-16 05:32:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:09,598 INFO L225 Difference]: With dead ends: 74 [2022-10-16 05:32:09,598 INFO L226 Difference]: Without dead ends: 74 [2022-10-16 05:32:09,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-10-16 05:32:09,604 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 37 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:09,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 157 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:32:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-16 05:32:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-10-16 05:32:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 67 states have internal predecessors, (75), 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 05:32:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-10-16 05:32:09,624 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 13 [2022-10-16 05:32:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:09,625 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-10-16 05:32:09,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 05:32:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-10-16 05:32:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:32:09,626 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:09,627 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 05:32:09,663 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 05:32:09,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-16 05:32:09,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:09,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-16 05:32:09,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:09,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120979276] [2022-10-16 05:32:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:09,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:32:10,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:10,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120979276] [2022-10-16 05:32:10,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120979276] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118758479] [2022-10-16 05:32:10,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:32:10,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:10,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:10,119 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 05:32:10,138 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 05:32:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:32:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:32:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-16 05:32:10,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:10,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:32:10,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:32:10,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:32:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:32:10,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:32:10,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118758479] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:10,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:10,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-10-16 05:32:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127296114] [2022-10-16 05:32:10,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:10,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:32:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:32:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:32:10,652 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 05:32:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:11,104 INFO L93 Difference]: Finished difference Result 237 states and 271 transitions. [2022-10-16 05:32:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 05:32:11,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 05:32:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:11,108 INFO L225 Difference]: With dead ends: 237 [2022-10-16 05:32:11,108 INFO L226 Difference]: Without dead ends: 237 [2022-10-16 05:32:11,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:32:11,110 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 414 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:11,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 386 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 05:32:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-10-16 05:32:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 85. [2022-10-16 05:32:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 84 states have internal predecessors, (95), 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 05:32:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-10-16 05:32:11,119 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 20 [2022-10-16 05:32:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:11,120 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-10-16 05:32:11,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 05:32:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-10-16 05:32:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 05:32:11,121 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:11,121 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:11,175 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 05:32:11,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:11,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1928119503, now seen corresponding path program 1 times [2022-10-16 05:32:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:11,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701839029] [2022-10-16 05:32:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:32:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701839029] [2022-10-16 05:32:11,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701839029] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:32:11,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:32:11,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:32:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605170716] [2022-10-16 05:32:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:32:11,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:32:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:32:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:32:11,439 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 05:32:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:11,457 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2022-10-16 05:32:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:32:11,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 32 [2022-10-16 05:32:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:11,459 INFO L225 Difference]: With dead ends: 83 [2022-10-16 05:32:11,459 INFO L226 Difference]: Without dead ends: 83 [2022-10-16 05:32:11,463 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 05:32:11,468 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:11,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:32:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-10-16 05:32:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-10-16 05:32:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.273972602739726) internal successors, (93), 82 states have internal predecessors, (93), 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 05:32:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-10-16 05:32:11,483 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 32 [2022-10-16 05:32:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:11,483 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-10-16 05:32:11,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 05:32:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-10-16 05:32:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 05:32:11,485 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:11,486 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 05:32:11,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1928119502, now seen corresponding path program 1 times [2022-10-16 05:32:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048856764] [2022-10-16 05:32:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:11,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:32:11,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048856764] [2022-10-16 05:32:11,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048856764] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:32:11,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:32:11,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:32:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869265171] [2022-10-16 05:32:11,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:32:11,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:32:11,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:32:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:32:11,651 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 05:32:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:11,691 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2022-10-16 05:32:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:32:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 32 [2022-10-16 05:32:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:11,693 INFO L225 Difference]: With dead ends: 114 [2022-10-16 05:32:11,693 INFO L226 Difference]: Without dead ends: 114 [2022-10-16 05:32:11,694 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 05:32:11,694 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:11,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:32:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-10-16 05:32:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2022-10-16 05:32:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 88 states have internal predecessors, (103), 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 05:32:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2022-10-16 05:32:11,708 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 32 [2022-10-16 05:32:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:11,708 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2022-10-16 05:32:11,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 05:32:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2022-10-16 05:32:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 05:32:11,713 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:11,714 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:11,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 05:32:11,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash 358114969, now seen corresponding path program 1 times [2022-10-16 05:32:11,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:11,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195922488] [2022-10-16 05:32:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:11,883 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 05:32:11,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195922488] [2022-10-16 05:32:11,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195922488] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121640892] [2022-10-16 05:32:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:11,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:11,886 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 05:32:11,886 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 05:32:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:11,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:32:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:11,996 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 05:32:11,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:12,113 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 05:32:12,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121640892] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:12,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:12,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:32:12,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642258627] [2022-10-16 05:32:12,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:32:12,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:32:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:32:12,118 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 05:32:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:12,186 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2022-10-16 05:32:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:32:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 33 [2022-10-16 05:32:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:12,188 INFO L225 Difference]: With dead ends: 107 [2022-10-16 05:32:12,188 INFO L226 Difference]: Without dead ends: 107 [2022-10-16 05:32:12,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 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 05:32:12,189 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 71 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:12,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 250 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:32:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-10-16 05:32:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-10-16 05:32:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 103 states have internal predecessors, (117), 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 05:32:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2022-10-16 05:32:12,196 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 33 [2022-10-16 05:32:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:12,196 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2022-10-16 05:32:12,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 05:32:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2022-10-16 05:32:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-16 05:32:12,198 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:12,198 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2022-10-16 05:32:12,235 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 05:32:12,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:12,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2022-10-16 05:32:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:12,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488071249] [2022-10-16 05:32:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:12,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:32:12,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488071249] [2022-10-16 05:32:12,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488071249] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541152319] [2022-10-16 05:32:12,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:32:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:12,916 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 05:32:12,936 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 05:32:12,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:32:12,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:32:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-16 05:32:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:32:12,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:32:12,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:32:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-10-16 05:32:13,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:32:13,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541152319] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:32:13,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:32:13,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2022-10-16 05:32:13,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136104280] [2022-10-16 05:32:13,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:32:13,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 05:32:13,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 05:32:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:32:13,223 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:32:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:13,266 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-10-16 05:32:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:32:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 44 [2022-10-16 05:32:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:13,268 INFO L225 Difference]: With dead ends: 103 [2022-10-16 05:32:13,268 INFO L226 Difference]: Without dead ends: 103 [2022-10-16 05:32:13,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:32:13,269 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:13,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 57 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:32:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-10-16 05:32:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-10-16 05:32:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.202127659574468) internal successors, (113), 102 states have internal predecessors, (113), 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 05:32:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2022-10-16 05:32:13,275 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 44 [2022-10-16 05:32:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:13,275 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2022-10-16 05:32:13,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:32:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2022-10-16 05:32:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-16 05:32:13,277 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:13,278 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:13,317 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 05:32:13,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:13,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1846100865, now seen corresponding path program 2 times [2022-10-16 05:32:13,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312933844] [2022-10-16 05:32:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:13,957 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 05:32:13,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:13,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312933844] [2022-10-16 05:32:13,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312933844] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:13,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298627551] [2022-10-16 05:32:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:32:13,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:13,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:13,960 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 05:32:13,965 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 05:32:14,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:32:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:32:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:32:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:14,127 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 05:32:14,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:14,505 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 05:32:14,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298627551] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:14,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:14,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-16 05:32:14,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254158179] [2022-10-16 05:32:14,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:14,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 05:32:14,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 05:32:14,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:32:14,508 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 05:32:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:14,646 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2022-10-16 05:32:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 05:32:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 65 [2022-10-16 05:32:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:14,649 INFO L225 Difference]: With dead ends: 167 [2022-10-16 05:32:14,649 INFO L226 Difference]: Without dead ends: 167 [2022-10-16 05:32:14,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:32:14,650 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:14,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 189 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:32:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-10-16 05:32:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-10-16 05:32:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 158 states have (on average 1.120253164556962) internal successors, (177), 166 states have internal predecessors, (177), 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 05:32:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 177 transitions. [2022-10-16 05:32:14,657 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 177 transitions. Word has length 65 [2022-10-16 05:32:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:14,657 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 177 transitions. [2022-10-16 05:32:14,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 05:32:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 177 transitions. [2022-10-16 05:32:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-10-16 05:32:14,661 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:14,662 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:14,696 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 05:32:14,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:14,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1361190225, now seen corresponding path program 3 times [2022-10-16 05:32:14,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:14,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542072213] [2022-10-16 05:32:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:32:16,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:16,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542072213] [2022-10-16 05:32:16,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542072213] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:16,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056750208] [2022-10-16 05:32:16,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:32:16,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:16,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:16,148 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 05:32:16,153 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 05:32:16,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:32:16,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:32:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:32:16,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2022-10-16 05:32:16,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:16,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-10-16 05:32:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2022-10-16 05:32:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056750208] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:17,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:17,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 6, 6] total 43 [2022-10-16 05:32:17,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922218902] [2022-10-16 05:32:17,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:17,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-10-16 05:32:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-10-16 05:32:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=1172, Unknown=0, NotChecked=0, Total=1806 [2022-10-16 05:32:17,420 INFO L87 Difference]: Start difference. First operand 167 states and 177 transitions. Second operand has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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 05:32:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:18,902 INFO L93 Difference]: Finished difference Result 218 states and 235 transitions. [2022-10-16 05:32:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-10-16 05:32:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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 129 [2022-10-16 05:32:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:18,905 INFO L225 Difference]: With dead ends: 218 [2022-10-16 05:32:18,905 INFO L226 Difference]: Without dead ends: 218 [2022-10-16 05:32:18,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2062, Invalid=3790, Unknown=0, NotChecked=0, Total=5852 [2022-10-16 05:32:18,910 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 518 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:18,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 168 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 05:32:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-10-16 05:32:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 203. [2022-10-16 05:32:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 196 states have (on average 1.1224489795918366) internal successors, (220), 202 states have internal predecessors, (220), 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 05:32:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 220 transitions. [2022-10-16 05:32:18,918 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 220 transitions. Word has length 129 [2022-10-16 05:32:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:18,919 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 220 transitions. [2022-10-16 05:32:18,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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 05:32:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 220 transitions. [2022-10-16 05:32:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-10-16 05:32:18,929 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:18,929 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:18,964 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 05:32:19,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:19,144 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1888898362, now seen corresponding path program 1 times [2022-10-16 05:32:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:19,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348399085] [2022-10-16 05:32:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1896 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:20,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348399085] [2022-10-16 05:32:20,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348399085] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:20,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657006585] [2022-10-16 05:32:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:20,401 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 05:32:20,418 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 05:32:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:20,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-16 05:32:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1896 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:20,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1896 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:22,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657006585] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:22,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:22,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2022-10-16 05:32:22,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511119027] [2022-10-16 05:32:22,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:22,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-10-16 05:32:22,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:22,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-10-16 05:32:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 05:32:22,146 INFO L87 Difference]: Start difference. First operand 203 states and 220 transitions. Second operand has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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 05:32:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:22,475 INFO L93 Difference]: Finished difference Result 335 states and 352 transitions. [2022-10-16 05:32:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-10-16 05:32:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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 05:32:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:22,478 INFO L225 Difference]: With dead ends: 335 [2022-10-16 05:32:22,478 INFO L226 Difference]: Without dead ends: 335 [2022-10-16 05:32:22,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 05:32:22,481 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 192 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:22,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 362 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:32:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-10-16 05:32:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-10-16 05:32:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 328 states have (on average 1.0731707317073171) internal successors, (352), 334 states have internal predecessors, (352), 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 05:32:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 352 transitions. [2022-10-16 05:32:22,492 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 352 transitions. Word has length 139 [2022-10-16 05:32:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:22,492 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 352 transitions. [2022-10-16 05:32:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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 05:32:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 352 transitions. [2022-10-16 05:32:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-10-16 05:32:22,500 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:22,501 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:22,538 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 05:32:22,715 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,SelfDestructingSolverStorable11 [2022-10-16 05:32:22,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1310172029, now seen corresponding path program 2 times [2022-10-16 05:32:22,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:22,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116778272] [2022-10-16 05:32:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8133 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:27,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:27,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116778272] [2022-10-16 05:32:27,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116778272] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522843544] [2022-10-16 05:32:27,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:32:27,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:27,212 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 05:32:27,213 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 05:32:27,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:32:27,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:32:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 66 conjunts are in the unsatisfiable core [2022-10-16 05:32:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8133 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:27,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8133 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:33,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522843544] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:33,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:33,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2022-10-16 05:32:33,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754801201] [2022-10-16 05:32:33,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:33,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-10-16 05:32:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:33,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-10-16 05:32:33,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2022-10-16 05:32:33,437 INFO L87 Difference]: Start difference. First operand 335 states and 352 transitions. Second operand has 133 states, 133 states have (on average 3.9849624060150375) internal successors, (530), 133 states have internal predecessors, (530), 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 05:32:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:34,243 INFO L93 Difference]: Finished difference Result 599 states and 616 transitions. [2022-10-16 05:32:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-10-16 05:32:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9849624060150375) internal successors, (530), 133 states have internal predecessors, (530), 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 271 [2022-10-16 05:32:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:34,248 INFO L225 Difference]: With dead ends: 599 [2022-10-16 05:32:34,248 INFO L226 Difference]: Without dead ends: 599 [2022-10-16 05:32:34,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2022-10-16 05:32:34,254 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:34,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 355 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:32:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-10-16 05:32:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-10-16 05:32:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 592 states have (on average 1.0405405405405406) internal successors, (616), 598 states have internal predecessors, (616), 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 05:32:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 616 transitions. [2022-10-16 05:32:34,266 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 616 transitions. Word has length 271 [2022-10-16 05:32:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:34,267 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 616 transitions. [2022-10-16 05:32:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9849624060150375) internal successors, (530), 133 states have internal predecessors, (530), 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 05:32:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 616 transitions. [2022-10-16 05:32:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-10-16 05:32:34,278 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:34,279 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:34,320 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 05:32:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 05:32:34,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:32:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2007298947, now seen corresponding path program 3 times [2022-10-16 05:32:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:34,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185681665] [2022-10-16 05:32:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:34,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33675 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:50,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185681665] [2022-10-16 05:32:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185681665] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695475995] [2022-10-16 05:32:50,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:32:50,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:50,539 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 05:32:50,540 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 05:32:50,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:32:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:32:50,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:32:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:50,774 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:32:50,775 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 05:32:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33675 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2022-10-16 05:32:53,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33675 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2022-10-16 05:32:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695475995] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:56,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:56,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2022-10-16 05:32:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399358391] [2022-10-16 05:32:56,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:56,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-10-16 05:32:56,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-10-16 05:32:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8790, Invalid=9842, Unknown=0, NotChecked=0, Total=18632 [2022-10-16 05:32:56,545 INFO L87 Difference]: Start difference. First operand 599 states and 616 transitions. Second operand has 137 states, 137 states have (on average 4.138686131386861) internal successors, (567), 137 states have internal predecessors, (567), 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 05:33:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:33:08,571 INFO L93 Difference]: Finished difference Result 730 states and 765 transitions. [2022-10-16 05:33:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-10-16 05:33:08,572 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 4.138686131386861) internal successors, (567), 137 states have internal predecessors, (567), 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 535 [2022-10-16 05:33:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:33:08,577 INFO L225 Difference]: With dead ends: 730 [2022-10-16 05:33:08,577 INFO L226 Difference]: Without dead ends: 730 [2022-10-16 05:33:08,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1333 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9297 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=26743, Invalid=45349, Unknown=0, NotChecked=0, Total=72092 [2022-10-16 05:33:08,585 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1034 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 05:33:08,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 672 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-16 05:33:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-10-16 05:33:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 639. [2022-10-16 05:33:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 632 states have (on average 1.0537974683544304) internal successors, (666), 638 states have internal predecessors, (666), 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 05:33:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 666 transitions. [2022-10-16 05:33:08,598 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 666 transitions. Word has length 535 [2022-10-16 05:33:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:33:08,599 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 666 transitions. [2022-10-16 05:33:08,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.138686131386861) internal successors, (567), 137 states have internal predecessors, (567), 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 05:33:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 666 transitions. [2022-10-16 05:33:08,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-10-16 05:33:08,612 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:33:08,613 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 131, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:33:08,649 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 05:33:08,826 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,SelfDestructingSolverStorable13 [2022-10-16 05:33:08,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:33:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:33:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1699907007, now seen corresponding path program 1 times [2022-10-16 05:33:08,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:33:08,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754005214] [2022-10-16 05:33:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:33:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:33:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:33:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 34206 backedges. 0 proven. 521 refuted. 0 times theorem prover too weak. 33685 trivial. 0 not checked. [2022-10-16 05:33:09,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:33:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754005214] [2022-10-16 05:33:09,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754005214] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:33:09,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830495474] [2022-10-16 05:33:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:33:09,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:33:09,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:33:09,788 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 05:33:09,808 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 05:33:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:33:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 133 conjunts are in the unsatisfiable core [2022-10-16 05:33:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:33:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34206 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-16 05:33:18,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:33:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34206 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-16 05:33:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830495474] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:33:41,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:33:41,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 134, 134] total 270 [2022-10-16 05:33:41,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945026654] [2022-10-16 05:33:41,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:33:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 270 states [2022-10-16 05:33:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:33:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 270 interpolants. [2022-10-16 05:33:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35784, Invalid=36846, Unknown=0, NotChecked=0, Total=72630 [2022-10-16 05:33:41,349 INFO L87 Difference]: Start difference. First operand 639 states and 666 transitions. Second operand has 270 states, 270 states have (on average 3.9962962962962965) internal successors, (1079), 270 states have internal predecessors, (1079), 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 05:34:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:34:25,307 INFO L93 Difference]: Finished difference Result 1179 states and 1207 transitions. [2022-10-16 05:34:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2022-10-16 05:34:25,308 INFO L78 Accepts]: Start accepts. Automaton has has 270 states, 270 states have (on average 3.9962962962962965) internal successors, (1079), 270 states have internal predecessors, (1079), 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 05:34:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:34:25,315 INFO L225 Difference]: With dead ends: 1179 [2022-10-16 05:34:25,315 INFO L226 Difference]: Without dead ends: 1179 [2022-10-16 05:34:25,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1353 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44289 ImplicationChecksByTransitivity, 70.5s TimeCoverageRelationStatistics Valid=106538, Invalid=178084, Unknown=0, NotChecked=0, Total=284622 [2022-10-16 05:34:25,335 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1630 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:34:25,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1630 Valid, 418 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-16 05:34:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-10-16 05:34:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1173. [2022-10-16 05:34:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1166 states have (on average 1.0291595197255574) internal successors, (1200), 1172 states have internal predecessors, (1200), 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 05:34:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1200 transitions. [2022-10-16 05:34:25,357 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1200 transitions. Word has length 543 [2022-10-16 05:34:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:34:25,358 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1200 transitions. [2022-10-16 05:34:25,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 270 states, 270 states have (on average 3.9962962962962965) internal successors, (1079), 270 states have internal predecessors, (1079), 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 05:34:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1200 transitions. [2022-10-16 05:34:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2022-10-16 05:34:25,415 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:34:25,415 INFO L195 NwaCegarLoop]: trace histogram [264, 264, 264, 264, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:34:25,454 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 05:34:25,616 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,SelfDestructingSolverStorable14 [2022-10-16 05:34:25,617 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:34:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:34:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -612883537, now seen corresponding path program 1 times [2022-10-16 05:34:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:34:25,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982951405] [2022-10-16 05:34:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:34:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:34:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:34:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 139143 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 139143 trivial. 0 not checked. [2022-10-16 05:34:26,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:34:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982951405] [2022-10-16 05:34:26,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982951405] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:34:26,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:34:26,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:34:26,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714004990] [2022-10-16 05:34:26,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:34:26,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:34:26,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:34:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:34:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:34:26,924 INFO L87 Difference]: Start difference. First operand 1173 states and 1200 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 05:34:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:34:26,933 INFO L93 Difference]: Finished difference Result 1194 states and 1223 transitions. [2022-10-16 05:34:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:34:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 1077 [2022-10-16 05:34:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:34:26,940 INFO L225 Difference]: With dead ends: 1194 [2022-10-16 05:34:26,940 INFO L226 Difference]: Without dead ends: 1194 [2022-10-16 05:34:26,941 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 05:34:26,941 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:34:26,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:34:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-10-16 05:34:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1178. [2022-10-16 05:34:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1171 states have (on average 1.031596925704526) internal successors, (1208), 1177 states have internal predecessors, (1208), 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 05:34:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1208 transitions. [2022-10-16 05:34:26,964 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1208 transitions. Word has length 1077 [2022-10-16 05:34:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:34:26,966 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1208 transitions. [2022-10-16 05:34:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 05:34:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1208 transitions. [2022-10-16 05:34:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2022-10-16 05:34:26,981 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:34:26,982 INFO L195 NwaCegarLoop]: trace histogram [264, 264, 264, 264, 5, 4, 4, 4, 1, 1, 1, 1] [2022-10-16 05:34:26,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-16 05:34:26,982 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-16 05:34:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:34:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash -574557124, now seen corresponding path program 4 times [2022-10-16 05:34:26,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:34:26,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317451063] [2022-10-16 05:34:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:34:26,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:34:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 139160 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-10-16 05:35:39,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317451063] [2022-10-16 05:35:39,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317451063] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656864357] [2022-10-16 05:35:39,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 05:35:39,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:39,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:39,995 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 05:35:40,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process