/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-cav19/array_init_both_ends_multiple_sum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:14:38,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:14:38,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:14:38,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:14:38,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:14:38,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:14:38,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:14:38,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:14:38,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:14:38,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:14:38,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:14:38,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:14:38,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:14:38,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:14:38,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:14:38,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:14:38,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:14:38,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:14:38,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:14:38,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:14:38,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:14:38,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:14:38,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:14:38,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:14:38,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:14:38,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:14:38,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:14:38,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:14:38,280 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 [2022-10-15 16:14:38,333 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:14:38,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:14:38,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:14:38,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:14:38,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:14:38,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:14:38,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:14:38,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:14:38,339 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:14:38,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:14:38,341 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:14:38,341 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:14:38,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:14:38,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:14:38,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:14:38,342 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:14:38,342 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:14:38,342 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:14:38,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:14:38,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:14:38,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:14:38,343 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:14:38,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:14:38,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:14:38,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:14:38,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:14:38,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:14:38,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:14:38,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:14:38,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:14:38,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:14:38,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:14:38,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:14:38,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:14:38,850 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:14:38,851 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:14:38,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2022-10-15 16:14:38,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3510590c1/4d39bff08a3c4f788a9e35a82494af5e/FLAGc166c55cf [2022-10-15 16:14:39,601 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:14:39,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2022-10-15 16:14:39,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3510590c1/4d39bff08a3c4f788a9e35a82494af5e/FLAGc166c55cf [2022-10-15 16:14:39,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3510590c1/4d39bff08a3c4f788a9e35a82494af5e [2022-10-15 16:14:39,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:14:39,973 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:14:39,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:14:39,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:14:39,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:14:39,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:39,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3252f60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39, skipping insertion in model container [2022-10-15 16:14:39,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:39,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:14:40,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:14:40,206 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-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-10-15 16:14:40,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:14:40,237 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:14:40,251 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-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-10-15 16:14:40,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:14:40,273 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:14:40,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40 WrapperNode [2022-10-15 16:14:40,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:14:40,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:14:40,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:14:40,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:14:40,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,316 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-10-15 16:14:40,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:14:40,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:14:40,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:14:40,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:14:40,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,357 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:14:40,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:14:40,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:14:40,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:14:40,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (1/1) ... [2022-10-15 16:14:40,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:14:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:40,413 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) [2022-10-15 16:14:40,437 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 [2022-10-15 16:14:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:14:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:14:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:14:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:14:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:14:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:14:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:14:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:14:40,590 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:14:40,593 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:14:40,876 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:14:40,908 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:14:40,908 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 16:14:40,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:14:40 BoogieIcfgContainer [2022-10-15 16:14:40,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:14:40,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:14:40,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:14:40,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:14:40,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:14:39" (1/3) ... [2022-10-15 16:14:40,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3f2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:14:40, skipping insertion in model container [2022-10-15 16:14:40,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:40" (2/3) ... [2022-10-15 16:14:40,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3f2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:14:40, skipping insertion in model container [2022-10-15 16:14:40,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:14:40" (3/3) ... [2022-10-15 16:14:40,930 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2022-10-15 16:14:40,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:14:40,957 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-10-15 16:14:41,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:14:41,069 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;@1149fa7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:14:41,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-10-15 16:14:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 31 states have internal predecessors, (38), 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) [2022-10-15 16:14:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:14:41,103 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:41,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:14:41,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 16:14:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:41,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226445148] [2022-10-15 16:14:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:41,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:41,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226445148] [2022-10-15 16:14:41,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226445148] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:41,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:14:41,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137265126] [2022-10-15 16:14:41,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:14:41,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:41,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:14:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:14:41,585 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 31 states have internal predecessors, (38), 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) [2022-10-15 16:14:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:41,642 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-10-15 16:14:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:14:41,645 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 [2022-10-15 16:14:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:41,654 INFO L225 Difference]: With dead ends: 30 [2022-10-15 16:14:41,655 INFO L226 Difference]: Without dead ends: 28 [2022-10-15 16:14:41,657 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 [2022-10-15 16:14:41,662 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 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 [2022-10-15 16:14:41,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:14:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-15 16:14:41,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-10-15 16:14:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-10-15 16:14:41,703 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2022-10-15 16:14:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:41,703 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-10-15 16:14:41,704 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) [2022-10-15 16:14:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-10-15 16:14:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:14:41,704 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:41,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:14:41,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 16:14:41,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 16:14:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:41,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935160265] [2022-10-15 16:14:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:42,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:42,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935160265] [2022-10-15 16:14:42,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935160265] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:42,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:42,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:14:42,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699958286] [2022-10-15 16:14:42,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:42,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:14:42,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:14:42,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:14:42,009 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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) [2022-10-15 16:14:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:42,092 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-10-15 16:14:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:14:42,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 [2022-10-15 16:14:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:42,094 INFO L225 Difference]: With dead ends: 31 [2022-10-15 16:14:42,094 INFO L226 Difference]: Without dead ends: 31 [2022-10-15 16:14:42,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:14:42,096 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:42,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-15 16:14:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-10-15 16:14:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-10-15 16:14:42,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2022-10-15 16:14:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:42,105 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-10-15 16:14:42,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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) [2022-10-15 16:14:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-10-15 16:14:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 16:14:42,107 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:42,107 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 16:14:42,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 16:14:42,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:42,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2022-10-15 16:14:42,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:42,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066539436] [2022-10-15 16:14:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:42,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066539436] [2022-10-15 16:14:42,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066539436] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8042397] [2022-10-15 16:14:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:42,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:42,477 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) [2022-10-15 16:14:42,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 16:14:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:42,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 16:14:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:14:42,667 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 [2022-10-15 16:14:42,679 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 [2022-10-15 16:14:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:42,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:42,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 16:14:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:42,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8042397] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:42,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:42,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-10-15 16:14:42,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295593765] [2022-10-15 16:14:42,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:42,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:14:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:14:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:14:42,922 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:43,106 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-10-15 16:14:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:14:43,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 16:14:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:43,110 INFO L225 Difference]: With dead ends: 41 [2022-10-15 16:14:43,110 INFO L226 Difference]: Without dead ends: 41 [2022-10-15 16:14:43,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:14:43,112 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:43,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-15 16:14:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-10-15 16:14:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 38 states have internal predecessors, (43), 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) [2022-10-15 16:14:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-10-15 16:14:43,121 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 7 [2022-10-15 16:14:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:43,122 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-10-15 16:14:43,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-10-15 16:14:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 16:14:43,123 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:43,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:43,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:43,336 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 [2022-10-15 16:14:43,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1021848304, now seen corresponding path program 1 times [2022-10-15 16:14:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:43,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306329726] [2022-10-15 16:14:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 16:14:43,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:43,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306329726] [2022-10-15 16:14:43,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306329726] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:43,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:43,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:14:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551079919] [2022-10-15 16:14:43,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:43,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:14:43,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:14:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:14:43,462 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:43,495 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-10-15 16:14:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:14:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 16:14:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:43,498 INFO L225 Difference]: With dead ends: 37 [2022-10-15 16:14:43,499 INFO L226 Difference]: Without dead ends: 37 [2022-10-15 16:14:43,500 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 [2022-10-15 16:14:43,504 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:43,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:14:43,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-15 16:14:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-10-15 16:14:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 36 states have internal predecessors, (41), 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) [2022-10-15 16:14:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-10-15 16:14:43,525 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 12 [2022-10-15 16:14:43,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:43,526 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-10-15 16:14:43,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-10-15 16:14:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 16:14:43,527 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:43,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:43,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 16:14:43,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1021848305, now seen corresponding path program 1 times [2022-10-15 16:14:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751351624] [2022-10-15 16:14:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:43,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:43,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:43,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751351624] [2022-10-15 16:14:43,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751351624] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:43,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250980596] [2022-10-15 16:14:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:43,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:43,649 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) [2022-10-15 16:14:43,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 16:14:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 16:14:43,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250980596] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:43,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:43,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-10-15 16:14:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156409838] [2022-10-15 16:14:43,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:43,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 16:14:43,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 16:14:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:14:43,820 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:44,061 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-10-15 16:14:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 16:14:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 16:14:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:44,063 INFO L225 Difference]: With dead ends: 100 [2022-10-15 16:14:44,063 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 16:14:44,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2022-10-15 16:14:44,065 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:44,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 35 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:14:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 16:14:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-10-15 16:14:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 83 states have internal predecessors, (102), 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) [2022-10-15 16:14:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-10-15 16:14:44,075 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 12 [2022-10-15 16:14:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:44,075 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-10-15 16:14:44,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-10-15 16:14:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 16:14:44,076 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:44,077 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-15 16:14:44,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:44,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:44,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:44,293 INFO L85 PathProgramCache]: Analyzing trace with hash -116849082, now seen corresponding path program 2 times [2022-10-15 16:14:44,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:44,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975006626] [2022-10-15 16:14:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:44,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:44,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975006626] [2022-10-15 16:14:44,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975006626] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:44,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406760341] [2022-10-15 16:14:44,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:14:44,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:44,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:44,599 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) [2022-10-15 16:14:44,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 16:14:44,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:14:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:14:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:14:44,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:44,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:14:44,720 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 [2022-10-15 16:14:44,728 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 [2022-10-15 16:14:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:44,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:45,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406760341] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:45,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:45,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-10-15 16:14:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108975233] [2022-10-15 16:14:45,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:45,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-15 16:14:45,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:45,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-15 16:14:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-10-15 16:14:45,414 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 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) [2022-10-15 16:14:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:45,964 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-10-15 16:14:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 16:14:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-15 16:14:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:45,966 INFO L225 Difference]: With dead ends: 92 [2022-10-15 16:14:45,966 INFO L226 Difference]: Without dead ends: 92 [2022-10-15 16:14:45,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2022-10-15 16:14:45,968 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 300 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:45,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 78 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:14:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-15 16:14:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2022-10-15 16:14:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.205128205128205) internal successors, (94), 81 states have internal predecessors, (94), 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) [2022-10-15 16:14:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-10-15 16:14:45,977 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 16 [2022-10-15 16:14:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:45,977 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-10-15 16:14:45,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 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) [2022-10-15 16:14:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-10-15 16:14:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 16:14:45,980 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:45,980 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:46,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:46,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:46,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash 396169457, now seen corresponding path program 2 times [2022-10-15 16:14:46,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:46,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755478415] [2022-10-15 16:14:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:46,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:46,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:46,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755478415] [2022-10-15 16:14:46,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755478415] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542747284] [2022-10-15 16:14:46,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:14:46,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:46,356 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) [2022-10-15 16:14:46,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 16:14:46,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:14:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:14:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 16:14:46,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:46,444 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 16:14:46,444 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 [2022-10-15 16:14:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-15 16:14:46,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:14:46,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542747284] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:46,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:14:46,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-10-15 16:14:46,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637503614] [2022-10-15 16:14:46,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:46,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:14:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:14:46,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:14:46,588 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:46,627 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2022-10-15 16:14:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:14:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 16:14:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:46,629 INFO L225 Difference]: With dead ends: 82 [2022-10-15 16:14:46,629 INFO L226 Difference]: Without dead ends: 82 [2022-10-15 16:14:46,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:14:46,630 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:14:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-15 16:14:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-10-15 16:14:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 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) [2022-10-15 16:14:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2022-10-15 16:14:46,637 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 24 [2022-10-15 16:14:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:46,638 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2022-10-15 16:14:46,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2022-10-15 16:14:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 16:14:46,639 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:46,639 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:46,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:46,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:46,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash -285863884, now seen corresponding path program 1 times [2022-10-15 16:14:46,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:46,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779275032] [2022-10-15 16:14:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:46,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:14:47,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779275032] [2022-10-15 16:14:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779275032] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522308117] [2022-10-15 16:14:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:47,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:47,018 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) [2022-10-15 16:14:47,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 16:14:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:47,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 16:14:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:14:47,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:14:47,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522308117] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:47,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:47,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-10-15 16:14:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964337904] [2022-10-15 16:14:47,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 16:14:47,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 16:14:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2022-10-15 16:14:47,346 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 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) [2022-10-15 16:14:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:47,809 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2022-10-15 16:14:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 16:14:47,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 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 27 [2022-10-15 16:14:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:47,811 INFO L225 Difference]: With dead ends: 194 [2022-10-15 16:14:47,811 INFO L226 Difference]: Without dead ends: 194 [2022-10-15 16:14:47,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2022-10-15 16:14:47,813 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 472 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:47,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 56 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:14:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-10-15 16:14:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 170. [2022-10-15 16:14:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.180722891566265) internal successors, (196), 169 states have internal predecessors, (196), 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) [2022-10-15 16:14:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2022-10-15 16:14:47,824 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 27 [2022-10-15 16:14:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:47,825 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2022-10-15 16:14:47,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 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) [2022-10-15 16:14:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2022-10-15 16:14:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 16:14:47,826 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:47,827 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:47,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:48,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:48,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash -997997516, now seen corresponding path program 2 times [2022-10-15 16:14:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:48,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589932419] [2022-10-15 16:14:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:14:48,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:48,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589932419] [2022-10-15 16:14:48,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589932419] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:48,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172081026] [2022-10-15 16:14:48,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:14:48,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:48,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:48,578 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) [2022-10-15 16:14:48,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 16:14:48,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:14:48,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:14:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 16:14:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:14:49,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:14:49,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172081026] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:49,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:49,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-10-15 16:14:49,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697771254] [2022-10-15 16:14:49,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:49,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-15 16:14:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-15 16:14:49,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 16:14:49,475 INFO L87 Difference]: Start difference. First operand 170 states and 196 transitions. Second operand has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 48 states have internal predecessors, (139), 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) [2022-10-15 16:14:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:50,795 INFO L93 Difference]: Finished difference Result 402 states and 404 transitions. [2022-10-15 16:14:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-15 16:14:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 48 states have internal predecessors, (139), 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 51 [2022-10-15 16:14:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:50,799 INFO L225 Difference]: With dead ends: 402 [2022-10-15 16:14:50,800 INFO L226 Difference]: Without dead ends: 402 [2022-10-15 16:14:50,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2022-10-15 16:14:50,803 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 926 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:50,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 113 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 16:14:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-10-15 16:14:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 346. [2022-10-15 16:14:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 342 states have (on average 1.1812865497076024) internal successors, (404), 345 states have internal predecessors, (404), 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) [2022-10-15 16:14:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 404 transitions. [2022-10-15 16:14:50,819 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 404 transitions. Word has length 51 [2022-10-15 16:14:50,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:50,820 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 404 transitions. [2022-10-15 16:14:50,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 48 states have internal predecessors, (139), 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) [2022-10-15 16:14:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 404 transitions. [2022-10-15 16:14:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-10-15 16:14:50,824 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:50,824 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:50,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:51,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:51,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:51,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1628122164, now seen corresponding path program 3 times [2022-10-15 16:14:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:51,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966262693] [2022-10-15 16:14:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:51,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:14:52,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:52,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966262693] [2022-10-15 16:14:52,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966262693] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:52,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577130192] [2022-10-15 16:14:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:14:52,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:52,602 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) [2022-10-15 16:14:52,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 16:14:52,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:14:52,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:14:52,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:14:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:52,715 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 16:14:52,734 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 [2022-10-15 16:14:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-15 16:14:53,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-15 16:14:54,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577130192] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:54,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:54,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 4] total 40 [2022-10-15 16:14:54,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924209987] [2022-10-15 16:14:54,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:54,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-15 16:14:54,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:54,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-15 16:14:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=1017, Unknown=0, NotChecked=0, Total=1640 [2022-10-15 16:14:54,081 INFO L87 Difference]: Start difference. First operand 346 states and 404 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 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) [2022-10-15 16:14:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:56,851 INFO L93 Difference]: Finished difference Result 384 states and 386 transitions. [2022-10-15 16:14:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-10-15 16:14:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 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 99 [2022-10-15 16:14:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:56,855 INFO L225 Difference]: With dead ends: 384 [2022-10-15 16:14:56,855 INFO L226 Difference]: Without dead ends: 384 [2022-10-15 16:14:56,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1832, Invalid=3280, Unknown=0, NotChecked=0, Total=5112 [2022-10-15 16:14:56,859 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1263 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:56,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 76 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 16:14:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-10-15 16:14:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 382. [2022-10-15 16:14:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.0158730158730158) internal successors, (384), 381 states have internal predecessors, (384), 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) [2022-10-15 16:14:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 384 transitions. [2022-10-15 16:14:56,873 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 384 transitions. Word has length 99 [2022-10-15 16:14:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:56,874 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 384 transitions. [2022-10-15 16:14:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 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) [2022-10-15 16:14:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 384 transitions. [2022-10-15 16:14:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-10-15 16:14:56,883 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:56,884 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1] [2022-10-15 16:14:56,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:57,100 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:14:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:57,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1007478356, now seen corresponding path program 4 times [2022-10-15 16:14:57,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:57,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574919716] [2022-10-15 16:14:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-10-15 16:14:59,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:59,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574919716] [2022-10-15 16:14:59,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574919716] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:59,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270396636] [2022-10-15 16:14:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 16:14:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:59,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:59,856 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) [2022-10-15 16:14:59,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 16:15:00,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 16:15:00,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:00,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 70 conjunts are in the unsatisfiable core [2022-10-15 16:15:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 1650 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:03,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 1650 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:07,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270396636] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:07,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:07,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 71, 71] total 140 [2022-10-15 16:15:07,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097658854] [2022-10-15 16:15:07,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-10-15 16:15:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-10-15 16:15:07,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3185, Invalid=16275, Unknown=0, NotChecked=0, Total=19460 [2022-10-15 16:15:07,296 INFO L87 Difference]: Start difference. First operand 382 states and 384 transitions. Second operand has 140 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 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) [2022-10-15 16:15:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:10,296 INFO L93 Difference]: Finished difference Result 400 states and 402 transitions. [2022-10-15 16:15:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-10-15 16:15:10,300 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 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 204 [2022-10-15 16:15:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:10,307 INFO L225 Difference]: With dead ends: 400 [2022-10-15 16:15:10,307 INFO L226 Difference]: Without dead ends: 400 [2022-10-15 16:15:10,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 269 SyntacticMatches, 35 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11066 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5004, Invalid=25098, Unknown=0, NotChecked=0, Total=30102 [2022-10-15 16:15:10,320 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1619 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:10,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1619 Valid, 170 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 16:15:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-10-15 16:15:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 390. [2022-10-15 16:15:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 386 states have (on average 1.0155440414507773) internal successors, (392), 389 states have internal predecessors, (392), 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) [2022-10-15 16:15:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 392 transitions. [2022-10-15 16:15:10,333 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 392 transitions. Word has length 204 [2022-10-15 16:15:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:10,335 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 392 transitions. [2022-10-15 16:15:10,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 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) [2022-10-15 16:15:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 392 transitions. [2022-10-15 16:15:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-10-15 16:15:10,350 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:10,351 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2022-10-15 16:15:10,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:10,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-15 16:15:10,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:15:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1003631668, now seen corresponding path program 5 times [2022-10-15 16:15:10,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:10,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120918418] [2022-10-15 16:15:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:10,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-10-15 16:15:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120918418] [2022-10-15 16:15:12,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120918418] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617695468] [2022-10-15 16:15:12,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-15 16:15:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:12,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:12,686 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) [2022-10-15 16:15:12,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process