/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/termination-crafted-lit/cstrcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 04:34:31,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 04:34:31,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 04:34:31,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 04:34:31,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 04:34:31,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 04:34:31,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 04:34:31,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 04:34:31,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 04:34:31,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 04:34:31,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 04:34:31,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 04:34:31,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 04:34:31,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 04:34:31,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 04:34:31,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 04:34:31,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 04:34:31,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 04:34:31,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 04:34:31,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 04:34:31,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 04:34:31,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 04:34:31,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 04:34:31,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 04:34:31,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 04:34:31,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 04:34:31,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 04:34:31,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 04:34:31,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 04:34:31,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 04:34:31,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 04:34:31,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 04:34:31,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 04:34:31,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 04:34:31,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 04:34:31,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 04:34:31,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 04:34:31,376 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 04:34:31,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 04:34:31,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 04:34:31,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 04:34:31,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 04:34:31,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 04:34:31,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 04:34:31,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 04:34:31,380 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 04:34:31,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 04:34:31,381 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 04:34:31,381 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 04:34:31,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 04:34:31,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 04:34:31,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 04:34:31,382 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 04:34:31,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 04:34:31,383 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 04:34:31,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 04:34:31,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 04:34:31,383 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 04:34:31,384 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 04:34:31,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 04:34:31,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 04:34:31,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 04:34:31,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:34:31,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 04:34:31,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 04:34:31,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 04:34:31,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 04:34:31,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 04:34:31,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 04:34:31,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 04:34:31,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 04:34:31,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 04:34:31,854 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 04:34:31,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/cstrcmp.c [2022-10-16 04:34:31,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90abdb70/8ed30026832a40288c95302d9e79f8af/FLAGe762e496d [2022-10-16 04:34:32,509 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 04:34:32,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/cstrcmp.c [2022-10-16 04:34:32,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90abdb70/8ed30026832a40288c95302d9e79f8af/FLAGe762e496d [2022-10-16 04:34:32,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90abdb70/8ed30026832a40288c95302d9e79f8af [2022-10-16 04:34:32,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 04:34:32,911 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 04:34:32,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 04:34:32,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 04:34:32,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 04:34:32,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:34:32" (1/1) ... [2022-10-16 04:34:32,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebe8e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:32, skipping insertion in model container [2022-10-16 04:34:32,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:34:32" (1/1) ... [2022-10-16 04:34:32,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 04:34:32,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 04:34:33,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:34:33,124 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 04:34:33,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:34:33,160 INFO L208 MainTranslator]: Completed translation [2022-10-16 04:34:33,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33 WrapperNode [2022-10-16 04:34:33,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 04:34:33,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 04:34:33,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 04:34:33,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 04:34:33,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,204 INFO L138 Inliner]: procedures = 11, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2022-10-16 04:34:33,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 04:34:33,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 04:34:33,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 04:34:33,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 04:34:33,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,230 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 04:34:33,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 04:34:33,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 04:34:33,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 04:34:33,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (1/1) ... [2022-10-16 04:34:33,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:34:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:34:33,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 04:34:33,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 04:34:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 04:34:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2022-10-16 04:34:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2022-10-16 04:34:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-16 04:34:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 04:34:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 04:34:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 04:34:33,488 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 04:34:33,490 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 04:34:33,714 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 04:34:33,723 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 04:34:33,724 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-16 04:34:33,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:34:33 BoogieIcfgContainer [2022-10-16 04:34:33,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 04:34:33,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 04:34:33,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 04:34:33,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 04:34:33,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 04:34:32" (1/3) ... [2022-10-16 04:34:33,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cad437d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:34:33, skipping insertion in model container [2022-10-16 04:34:33,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:34:33" (2/3) ... [2022-10-16 04:34:33,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cad437d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:34:33, skipping insertion in model container [2022-10-16 04:34:33,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:34:33" (3/3) ... [2022-10-16 04:34:33,738 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp.c [2022-10-16 04:34:33,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 04:34:33,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-10-16 04:34:33,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 04:34:33,927 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;@32f7f9ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 04:34:33,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-10-16 04:34:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:34:33,942 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:33,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:33,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:33,951 INFO L85 PathProgramCache]: Analyzing trace with hash 888619623, now seen corresponding path program 1 times [2022-10-16 04:34:33,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:33,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688277734] [2022-10-16 04:34:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:34:34,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688277734] [2022-10-16 04:34:34,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688277734] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:34,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:34:34,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:34:34,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931348363] [2022-10-16 04:34:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:34:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:34,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:34:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:34:34,362 INFO L87 Difference]: Start difference. First operand has 42 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:34:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:34,433 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-10-16 04:34:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:34:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 04:34:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:34,444 INFO L225 Difference]: With dead ends: 41 [2022-10-16 04:34:34,445 INFO L226 Difference]: Without dead ends: 39 [2022-10-16 04:34:34,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:34:34,452 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:34,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:34:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-16 04:34:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-10-16 04:34:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.625) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-10-16 04:34:34,497 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 7 [2022-10-16 04:34:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:34,497 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-10-16 04:34:34,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:34:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-10-16 04:34:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:34:34,499 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:34,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:34,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 04:34:34,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash 888619624, now seen corresponding path program 1 times [2022-10-16 04:34:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:34,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354536719] [2022-10-16 04:34:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:34:34,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:34,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354536719] [2022-10-16 04:34:34,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354536719] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:34,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:34:34,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:34:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064168364] [2022-10-16 04:34:34,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:34,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:34:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:34:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:34:34,633 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:34:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:34,664 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-10-16 04:34:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:34:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 04:34:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:34,668 INFO L225 Difference]: With dead ends: 38 [2022-10-16 04:34:34,668 INFO L226 Difference]: Without dead ends: 38 [2022-10-16 04:34:34,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:34:34,674 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:34,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:34:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-16 04:34:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-16 04:34:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-10-16 04:34:34,688 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 7 [2022-10-16 04:34:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:34,688 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-10-16 04:34:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:34:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-10-16 04:34:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:34:34,692 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:34,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 04:34:34,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -875164255, now seen corresponding path program 1 times [2022-10-16 04:34:34,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:34,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323290307] [2022-10-16 04:34:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:35,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:35,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:34:35,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:35,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323290307] [2022-10-16 04:34:35,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323290307] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840797767] [2022-10-16 04:34:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:35,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:35,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:34:35,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:34:35,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 04:34:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:35,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 04:34:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:34:35,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:34:35,743 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-16 04:34:35,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-16 04:34:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:34:35,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:34:35,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840797767] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:35,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:34:35,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-10-16 04:34:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945625381] [2022-10-16 04:34:35,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:34:35,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 04:34:35,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 04:34:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-10-16 04:34:35,853 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 04:34:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:36,038 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-10-16 04:34:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:34:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-10-16 04:34:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:36,040 INFO L225 Difference]: With dead ends: 35 [2022-10-16 04:34:36,041 INFO L226 Difference]: Without dead ends: 35 [2022-10-16 04:34:36,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-10-16 04:34:36,047 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:36,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 83 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-10-16 04:34:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-16 04:34:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-16 04:34:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-10-16 04:34:36,064 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2022-10-16 04:34:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:36,066 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-10-16 04:34:36,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 04:34:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-10-16 04:34:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:34:36,071 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:36,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:36,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 04:34:36,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:36,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash -875164254, now seen corresponding path program 1 times [2022-10-16 04:34:36,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808314256] [2022-10-16 04:34:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:36,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:36,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:36,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:34:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808314256] [2022-10-16 04:34:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808314256] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809696848] [2022-10-16 04:34:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:34:36,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:34:36,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 04:34:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2022-10-16 04:34:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:34:37,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:34:37,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:34:37,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-16 04:34:37,294 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:34:37,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:34:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:34:37,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:34:43,542 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:34:43,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809696848] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:43,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:34:43,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-10-16 04:34:43,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127500991] [2022-10-16 04:34:43,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:34:43,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-16 04:34:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-16 04:34:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-10-16 04:34:43,549 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:34:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:44,043 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-10-16 04:34:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-16 04:34:44,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-10-16 04:34:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:44,048 INFO L225 Difference]: With dead ends: 80 [2022-10-16 04:34:44,048 INFO L226 Difference]: Without dead ends: 80 [2022-10-16 04:34:44,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-10-16 04:34:44,051 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:44,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 264 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 248 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-10-16 04:34:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-16 04:34:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 34. [2022-10-16 04:34:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.36) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-10-16 04:34:44,060 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2022-10-16 04:34:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:44,061 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-10-16 04:34:44,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:34:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-10-16 04:34:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-16 04:34:44,062 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:44,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:44,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 04:34:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-16 04:34:44,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1327324327, now seen corresponding path program 1 times [2022-10-16 04:34:44,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:44,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382843579] [2022-10-16 04:34:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 04:34:44,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:44,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382843579] [2022-10-16 04:34:44,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382843579] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:44,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:34:44,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:34:44,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698560584] [2022-10-16 04:34:44,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:44,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:34:44,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:44,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:34:44,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:34:44,365 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:44,397 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-10-16 04:34:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:34:44,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-16 04:34:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:44,399 INFO L225 Difference]: With dead ends: 35 [2022-10-16 04:34:44,399 INFO L226 Difference]: Without dead ends: 35 [2022-10-16 04:34:44,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:34:44,407 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:44,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:34:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-16 04:34:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-16 04:34:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-10-16 04:34:44,423 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2022-10-16 04:34:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:44,423 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-10-16 04:34:44,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-10-16 04:34:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-16 04:34:44,425 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:44,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:44,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 04:34:44,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1327333401, now seen corresponding path program 1 times [2022-10-16 04:34:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:44,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104671132] [2022-10-16 04:34:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:44,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 04:34:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:44,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104671132] [2022-10-16 04:34:44,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104671132] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:44,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:34:44,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 04:34:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684575201] [2022-10-16 04:34:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:44,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:34:44,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:34:44,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:34:44,566 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:44,635 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-10-16 04:34:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:34:44,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-16 04:34:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:44,636 INFO L225 Difference]: With dead ends: 33 [2022-10-16 04:34:44,636 INFO L226 Difference]: Without dead ends: 33 [2022-10-16 04:34:44,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:34:44,638 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:44,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 80 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:34:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-16 04:34:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-16 04:34:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-10-16 04:34:44,643 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2022-10-16 04:34:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:44,643 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-10-16 04:34:44,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-10-16 04:34:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-16 04:34:44,644 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:44,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:44,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 04:34:44,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1327333400, now seen corresponding path program 1 times [2022-10-16 04:34:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:44,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366062317] [2022-10-16 04:34:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:44,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:34:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366062317] [2022-10-16 04:34:44,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366062317] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:44,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:34:44,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 04:34:44,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586466795] [2022-10-16 04:34:44,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:44,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:34:44,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:34:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:34:44,853 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:44,976 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-10-16 04:34:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 04:34:44,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-16 04:34:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:44,978 INFO L225 Difference]: With dead ends: 74 [2022-10-16 04:34:44,978 INFO L226 Difference]: Without dead ends: 74 [2022-10-16 04:34:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-10-16 04:34:44,980 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:44,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 134 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:34:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-16 04:34:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2022-10-16 04:34:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:34:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-10-16 04:34:44,987 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2022-10-16 04:34:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:44,988 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-10-16 04:34:44,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-10-16 04:34:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-16 04:34:44,989 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:44,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:44,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 04:34:44,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:44,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1069167962, now seen corresponding path program 1 times [2022-10-16 04:34:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:44,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164296342] [2022-10-16 04:34:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:44,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:45,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:45,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:34:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164296342] [2022-10-16 04:34:45,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164296342] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:45,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:34:45,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-16 04:34:45,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134011996] [2022-10-16 04:34:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:45,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 04:34:45,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 04:34:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:34:45,233 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:45,355 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-10-16 04:34:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 04:34:45,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-16 04:34:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:45,361 INFO L225 Difference]: With dead ends: 66 [2022-10-16 04:34:45,361 INFO L226 Difference]: Without dead ends: 66 [2022-10-16 04:34:45,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-16 04:34:45,362 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:45,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 118 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:34:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-16 04:34:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2022-10-16 04:34:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:34:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-10-16 04:34:45,379 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 24 [2022-10-16 04:34:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:45,379 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-10-16 04:34:45,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-10-16 04:34:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:34:45,381 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:45,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:45,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-16 04:34:45,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1174551275, now seen corresponding path program 1 times [2022-10-16 04:34:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:45,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044255426] [2022-10-16 04:34:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:45,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:45,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:34:46,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:46,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044255426] [2022-10-16 04:34:46,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044255426] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:46,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133450887] [2022-10-16 04:34:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:46,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:46,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:34:46,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:34:46,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 04:34:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2022-10-16 04:34:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:34:46,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 04:34:46,364 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-10-16 04:34:46,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-10-16 04:34:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:34:46,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 04:34:46,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133450887] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:46,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 04:34:46,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 25 [2022-10-16 04:34:46,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613992938] [2022-10-16 04:34:46,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:46,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 04:34:46,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:46,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 04:34:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:34:46,400 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:46,803 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-10-16 04:34:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:34:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-10-16 04:34:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:46,805 INFO L225 Difference]: With dead ends: 66 [2022-10-16 04:34:46,805 INFO L226 Difference]: Without dead ends: 66 [2022-10-16 04:34:46,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:34:46,806 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:46,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 224 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-10-16 04:34:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-16 04:34:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-10-16 04:34:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:34:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-10-16 04:34:46,813 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 27 [2022-10-16 04:34:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:46,813 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-10-16 04:34:46,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-10-16 04:34:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:34:46,815 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:46,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:46,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 04:34:47,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:47,016 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash -105312403, now seen corresponding path program 1 times [2022-10-16 04:34:47,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:47,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116632378] [2022-10-16 04:34:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:47,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:47,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:34:47,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:47,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116632378] [2022-10-16 04:34:47,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116632378] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:47,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778948810] [2022-10-16 04:34:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:47,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:47,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:34:47,443 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:34:47,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 04:34:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:47,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-16 04:34:47,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:34:47,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:34:47,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:34:47,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 04:34:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:34:47,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-10-16 04:34:47,810 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 17 treesize of output 13 [2022-10-16 04:34:47,819 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:34:47,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:34:47,869 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:34:47,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-10-16 04:34:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:34:47,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:34:47,967 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_build_nondet_String_~nondetString~0.base_14 Int) (v_ArrVal_188 (Array Int Int))) (or (not (= (select |c_#valid| v_build_nondet_String_~nondetString~0.base_14) 0)) (= (select (select (store |c_#memory_int| v_build_nondet_String_~nondetString~0.base_14 v_ArrVal_188) |c_ULTIMATE.start_main_#t~ret11#1.base|) |c_ULTIMATE.start_main_#t~ret11#1.offset|) 0))) is different from false [2022-10-16 04:34:47,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778948810] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:47,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:34:47,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2022-10-16 04:34:47,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955675059] [2022-10-16 04:34:47,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:34:47,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-16 04:34:47,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:47,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-16 04:34:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=578, Unknown=2, NotChecked=48, Total=702 [2022-10-16 04:34:47,972 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 22 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:34:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:48,248 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2022-10-16 04:34:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:34:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 22 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2022-10-16 04:34:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:48,250 INFO L225 Difference]: With dead ends: 75 [2022-10-16 04:34:48,250 INFO L226 Difference]: Without dead ends: 75 [2022-10-16 04:34:48,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=4, NotChecked=64, Total=1190 [2022-10-16 04:34:48,252 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:48,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 296 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 170 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-10-16 04:34:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-16 04:34:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-10-16 04:34:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 04:34:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-10-16 04:34:48,258 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 27 [2022-10-16 04:34:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:48,258 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-10-16 04:34:48,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 22 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:34:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-10-16 04:34:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:34:48,260 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:48,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:48,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 04:34:48,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:48,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:48,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1910750737, now seen corresponding path program 1 times [2022-10-16 04:34:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895093682] [2022-10-16 04:34:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:48,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:48,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:48,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:34:49,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:49,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895093682] [2022-10-16 04:34:49,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895093682] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:49,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951340392] [2022-10-16 04:34:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:49,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:34:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:34:49,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:34:49,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 04:34:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:49,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2022-10-16 04:34:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:34:49,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:34:49,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:34:49,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:34:49,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:34:49,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-10-16 04:34:49,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:34:49,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2022-10-16 04:34:49,667 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:34:49,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:34:49,799 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:34:49,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-10-16 04:34:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:34:50,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:34:50,374 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 Int) (v_build_nondet_String_~nondetString~0.base_17 Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_17| Int) (v_ArrVal_224 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_17|)) (<= (+ 2 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_17|) (select (store |c_#length| v_build_nondet_String_~nondetString~0.base_17 v_ArrVal_223) |c_ULTIMATE.start_main_#t~ret11#1.base|)) (not (= 0 (select |c_#valid| v_build_nondet_String_~nondetString~0.base_17))) (= (select (select (store |c_#memory_int| v_build_nondet_String_~nondetString~0.base_17 v_ArrVal_224) |c_ULTIMATE.start_main_#t~ret11#1.base|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_17|) 0) (< |c_ULTIMATE.start_main_#t~ret11#1.offset| |v_ULTIMATE.start_cstrcmp_~s1#1.offset_17|))) is different from false [2022-10-16 04:34:50,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951340392] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:34:50,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:34:50,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-10-16 04:34:50,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980081200] [2022-10-16 04:34:50,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:34:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-16 04:34:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-16 04:34:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=953, Unknown=1, NotChecked=62, Total=1122 [2022-10-16 04:34:50,379 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:34:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:51,005 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2022-10-16 04:34:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:34:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2022-10-16 04:34:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:51,006 INFO L225 Difference]: With dead ends: 89 [2022-10-16 04:34:51,007 INFO L226 Difference]: Without dead ends: 89 [2022-10-16 04:34:51,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=1478, Unknown=1, NotChecked=78, Total=1722 [2022-10-16 04:34:51,009 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:51,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 604 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 340 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-10-16 04:34:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-16 04:34:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2022-10-16 04:34:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 04:34:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-10-16 04:34:51,015 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 27 [2022-10-16 04:34:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:51,015 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-10-16 04:34:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:34:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-10-16 04:34:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:34:51,017 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:51,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:51,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-16 04:34:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-16 04:34:51,232 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2082925002, now seen corresponding path program 1 times [2022-10-16 04:34:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570192917] [2022-10-16 04:34:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:51,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 04:34:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:51,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-16 04:34:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:34:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:34:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:34:51,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570192917] [2022-10-16 04:34:51,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570192917] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:34:51,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:34:51,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-10-16 04:34:51,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142328719] [2022-10-16 04:34:51,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:34:51,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 04:34:51,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:34:51,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 04:34:51,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-10-16 04:34:51,691 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:34:52,028 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-10-16 04:34:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-16 04:34:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-10-16 04:34:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:34:52,030 INFO L225 Difference]: With dead ends: 85 [2022-10-16 04:34:52,030 INFO L226 Difference]: Without dead ends: 85 [2022-10-16 04:34:52,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:34:52,032 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:34:52,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 240 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:34:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-16 04:34:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2022-10-16 04:34:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 63 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 04:34:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-10-16 04:34:52,037 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 31 [2022-10-16 04:34:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:34:52,037 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-10-16 04:34:52,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 04:34:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-10-16 04:34:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:34:52,039 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:34:52,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:52,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 04:34:52,040 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 04:34:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:34:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2082984584, now seen corresponding path program 1 times [2022-10-16 04:34:52,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:34:52,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428606776] [2022-10-16 04:34:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:34:52,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:34:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-16 04:34:52,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-16 04:34:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-16 04:34:52,092 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-16 04:34:52,092 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-16 04:34:52,093 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (12 of 13 remaining) [2022-10-16 04:34:52,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-10-16 04:34:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-10-16 04:34:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-10-16 04:34:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-10-16 04:34:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-10-16 04:34:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-10-16 04:34:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-10-16 04:34:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-10-16 04:34:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-10-16 04:34:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-10-16 04:34:52,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-10-16 04:34:52,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 13 remaining) [2022-10-16 04:34:52,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-16 04:34:52,102 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:34:52,107 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-16 04:34:52,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 04:34:52 BoogieIcfgContainer [2022-10-16 04:34:52,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-16 04:34:52,147 INFO L158 Benchmark]: Toolchain (without parser) took 19240.18ms. Allocated memory was 152.0MB in the beginning and 184.5MB in the end (delta: 32.5MB). Free memory was 127.3MB in the beginning and 118.5MB in the end (delta: 8.8MB). Peak memory consumption was 42.2MB. Max. memory is 8.0GB. [2022-10-16 04:34:52,147 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 152.0MB. Free memory is still 122.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-10-16 04:34:52,147 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.46ms. Allocated memory is still 152.0MB. Free memory was 127.1MB in the beginning and 117.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-10-16 04:34:52,148 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.42ms. Allocated memory is still 152.0MB. Free memory was 117.5MB in the beginning and 116.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-10-16 04:34:52,148 INFO L158 Benchmark]: Boogie Preprocessor took 28.21ms. Allocated memory is still 152.0MB. Free memory was 116.0MB in the beginning and 114.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-16 04:34:52,148 INFO L158 Benchmark]: RCFGBuilder took 492.59ms. Allocated memory is still 152.0MB. Free memory was 114.7MB in the beginning and 102.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-10-16 04:34:52,149 INFO L158 Benchmark]: TraceAbstraction took 18416.02ms. Allocated memory was 152.0MB in the beginning and 184.5MB in the end (delta: 32.5MB). Free memory was 101.5MB in the beginning and 118.5MB in the end (delta: -17.0MB). Peak memory consumption was 17.1MB. Max. memory is 8.0GB. [2022-10-16 04:34:52,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 152.0MB. Free memory is still 122.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 245.46ms. Allocated memory is still 152.0MB. Free memory was 127.1MB in the beginning and 117.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.42ms. Allocated memory is still 152.0MB. Free memory was 117.5MB in the beginning and 116.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.21ms. Allocated memory is still 152.0MB. Free memory was 116.0MB in the beginning and 114.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 492.59ms. Allocated memory is still 152.0MB. Free memory was 114.7MB in the beginning and 102.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 18416.02ms. Allocated memory was 152.0MB in the beginning and 184.5MB in the end (delta: 32.5MB). Free memory was 101.5MB in the beginning and 118.5MB in the end (delta: -17.0MB). Peak memory consumption was 17.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 43]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 43. Possible FailurePath: [L44] CALL, EXPR build_nondet_String() [L13] int length = __VERIFIER_nondet_int(); [L14] COND TRUE length < 1 [L15] length = 1 VAL [length=1] [L17] char* nondetString = (char*) malloc(length * sizeof(char)); [L18] nondetString[length-1] = '\0' VAL [length=1, nondetString={-1:0}] [L19] return nondetString; VAL [\result={-1:0}, length=1, nondetString={-1:0}] [L44] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L44] CALL, EXPR build_nondet_String() [L13] int length = __VERIFIER_nondet_int(); [L14] COND TRUE length < 1 [L15] length = 1 VAL [length=1] [L17] char* nondetString = (char*) malloc(length * sizeof(char)); [L18] nondetString[length-1] = '\0' VAL [length=1, nondetString={-2:0}] [L19] return nondetString; VAL [\result={-2:0}, length=1, nondetString={-2:0}] [L44] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-2:0}, build_nondet_String()={-1:0}] [L44] CALL, EXPR cstrcmp(build_nondet_String(),build_nondet_String()) [L28] unsigned char uc1, uc2; VAL [s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}] [L32] EXPR \read(*s1) VAL [\read(*s1)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}] [L32] *s1 != '\0' && *s1 == *s2 VAL [*s1 != '\0' && *s1 == *s2=0, \read(*s1)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}] [L32] COND FALSE !(*s1 != '\0' && *s1 == *s2) [L38] EXPR \read(*s1) VAL [\read(*s1)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}] [L38] uc1 = (*(unsigned char *) s1) [L39] EXPR \read(*s2) VAL [\read(*s2)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, uc1=0] [L39] uc2 = (*(unsigned char *) s2) [L40] EXPR (uc1 < uc2) ? -1 : (uc1 > uc2) VAL [(uc1 < uc2) ? -1 : (uc1 > uc2)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, uc1=0, uc2=0] [L40] return ((uc1 < uc2) ? -1 : (uc1 > uc2)); [L44] RET, EXPR cstrcmp(build_nondet_String(),build_nondet_String()) [L44] return cstrcmp(build_nondet_String(),build_nondet_String()); - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 42 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 18.2s, OverallIterations: 13, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 582 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 582 mSDsluCounter, 2263 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 260 IncrementalHoareTripleChecker+Unchecked, 1930 mSDsCounter, 76 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1584 IncrementalHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 76 mSolverCounterUnsat, 333 mSDtfsCounter, 1584 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 346 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=12, InterpolantAutomatonStates: 130, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 161 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 414 NumberOfCodeBlocks, 414 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 366 ConstructedInterpolants, 22 QuantifiedInterpolants, 2878 SizeOfPredicates, 50 NumberOfNonLiveVariables, 649 ConjunctsInSsa, 172 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 68/112 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-10-16 04:34:52,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...