/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/init-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:23:18,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:23:18,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:23:18,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:23:18,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:23:18,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:23:18,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:23:18,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:23:18,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:23:18,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:23:18,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:23:18,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:23:18,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:23:18,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:23:18,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:23:18,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:23:18,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:23:18,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:23:18,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:23:18,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:23:18,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:23:18,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:23:18,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:23:18,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:23:18,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 16:23:18,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 16:23:18,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 16:23:18,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 16:23:18,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 16:23:18,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 16:23:18,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:23:18,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:23:18,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:23:18,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:23:18,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:23:18,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:23:18,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:23:18,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:23:18,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:23:18,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:23:18,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:23:18,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 16:23:18,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:23:18,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:23:18,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:23:18,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:23:18,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:23:18,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:23:18,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:23:18,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:23:18,341 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:23:18,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:23:18,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:23:18,342 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:23:18,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:23:18,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:23:18,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:23:18,343 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:23:18,343 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:23:18,343 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:23:18,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:23:18,344 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:23:18,344 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:23:18,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:23:18,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:23:18,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:23:18,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:23:18,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:23:18,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:23:18,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:23:18,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:23:18,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:23:18,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:23:18,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:23:18,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:23:18,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:23:18,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:23:18,824 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:23:18,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-3-u.c [2022-10-15 16:23:18,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432675f19/1f18fe885224470291ffcac67dff4042/FLAG5ed640b10 [2022-10-15 16:23:19,594 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:23:19,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-3-u.c [2022-10-15 16:23:19,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432675f19/1f18fe885224470291ffcac67dff4042/FLAG5ed640b10 [2022-10-15 16:23:19,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432675f19/1f18fe885224470291ffcac67dff4042 [2022-10-15 16:23:19,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:23:19,887 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:23:19,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:23:19,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:23:19,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:23:19,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:23:19" (1/1) ... [2022-10-15 16:23:19,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487ac93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:19, skipping insertion in model container [2022-10-15 16:23:19,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:23:19" (1/1) ... [2022-10-15 16:23:19,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:23:19,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:23:20,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-3-u.c[320,333] [2022-10-15 16:23:20,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:23:20,122 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:23:20,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-3-u.c[320,333] [2022-10-15 16:23:20,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:23:20,161 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:23:20,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20 WrapperNode [2022-10-15 16:23:20,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:23:20,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:23:20,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:23:20,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:23:20,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,206 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2022-10-15 16:23:20,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:23:20,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:23:20,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:23:20,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:23:20,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,233 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:23:20,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:23:20,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:23:20,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:23:20,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (1/1) ... [2022-10-15 16:23:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:23:20,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:20,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 16:23:20,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 16:23:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:23:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:23:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:23:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:23:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:23:20,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:23:20,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:23:20,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:23:20,451 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:23:20,454 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:23:20,829 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:23:20,846 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:23:20,846 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-15 16:23:20,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:23:20 BoogieIcfgContainer [2022-10-15 16:23:20,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:23:20,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:23:20,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:23:20,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:23:20,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:23:19" (1/3) ... [2022-10-15 16:23:20,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258589a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:23:20, skipping insertion in model container [2022-10-15 16:23:20,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:20" (2/3) ... [2022-10-15 16:23:20,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258589a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:23:20, skipping insertion in model container [2022-10-15 16:23:20,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:23:20" (3/3) ... [2022-10-15 16:23:20,871 INFO L112 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2022-10-15 16:23:20,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:23:20,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-10-15 16:23:20,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:23:20,965 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;@6ed4b8c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:23:20,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-15 16:23:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 23 states have (on average 1.826086956521739) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 16:23:20,984 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:20,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 16:23:20,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:20,996 INFO L85 PathProgramCache]: Analyzing trace with hash 889698575, now seen corresponding path program 1 times [2022-10-15 16:23:21,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:21,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082429224] [2022-10-15 16:23:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:21,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:21,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915956136] [2022-10-15 16:23:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:21,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:21,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 16:23:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:21,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:23:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:21,599 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 [2022-10-15 16:23:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:21,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:23:21,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:21,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082429224] [2022-10-15 16:23:21,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:21,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915956136] [2022-10-15 16:23:21,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915956136] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:23:21,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:23:21,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:23:21,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793369106] [2022-10-15 16:23:21,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:23:21,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:23:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:21,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:23:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:23:21,915 INFO L87 Difference]: Start difference. First operand has 30 states, 23 states have (on average 1.826086956521739) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:22,145 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-10-15 16:23:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:23:22,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-15 16:23:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:22,173 INFO L225 Difference]: With dead ends: 50 [2022-10-15 16:23:22,173 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 16:23:22,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:23:22,185 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:22,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:23:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 16:23:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-10-15 16:23:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-10-15 16:23:22,243 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 6 [2022-10-15 16:23:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:22,244 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-10-15 16:23:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-10-15 16:23:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 16:23:22,246 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:22,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 16:23:22,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:22,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-15 16:23:22,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 889698574, now seen corresponding path program 1 times [2022-10-15 16:23:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:22,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429860315] [2022-10-15 16:23:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:22,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:22,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326586207] [2022-10-15 16:23:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:22,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:22,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:22,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:22,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 16:23:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:23:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:22,582 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 [2022-10-15 16:23:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:22,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:23:22,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429860315] [2022-10-15 16:23:22,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:22,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326586207] [2022-10-15 16:23:22,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326586207] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:23:22,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:23:22,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:23:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990727927] [2022-10-15 16:23:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:23:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:23:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:23:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:23:22,610 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:22,647 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-10-15 16:23:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:23:22,648 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-15 16:23:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:22,650 INFO L225 Difference]: With dead ends: 30 [2022-10-15 16:23:22,650 INFO L226 Difference]: Without dead ends: 30 [2022-10-15 16:23:22,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:23:22,653 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:22,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:23:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-15 16:23:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-15 16:23:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-10-15 16:23:22,666 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 6 [2022-10-15 16:23:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:22,667 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-10-15 16:23:22,667 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-10-15 16:23:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 16:23:22,669 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:22,669 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:22,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:22,884 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,SelfDestructingSolverStorable1 [2022-10-15 16:23:22,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash 767037271, now seen corresponding path program 1 times [2022-10-15 16:23:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:22,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981504897] [2022-10-15 16:23:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:22,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:22,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999442091] [2022-10-15 16:23:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:22,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:22,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:22,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 16:23:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:23:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:23,004 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 [2022-10-15 16:23:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:23,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981504897] [2022-10-15 16:23:23,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999442091] [2022-10-15 16:23:23,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999442091] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:23,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:23,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-10-15 16:23:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502158880] [2022-10-15 16:23:23,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:23,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 16:23:23,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 16:23:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:23:23,589 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:34,576 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 36 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-15 16:23:36,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-10-15 16:23:40,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-10-15 16:23:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:41,611 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2022-10-15 16:23:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-15 16:23:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-15 16:23:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:41,615 INFO L225 Difference]: With dead ends: 76 [2022-10-15 16:23:41,616 INFO L226 Difference]: Without dead ends: 76 [2022-10-15 16:23:41,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=178, Invalid=327, Unknown=1, NotChecked=0, Total=506 [2022-10-15 16:23:41,618 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:41,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 210 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-10-15 16:23:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-15 16:23:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2022-10-15 16:23:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 52 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-10-15 16:23:41,630 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 9 [2022-10-15 16:23:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:41,631 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-10-15 16:23:41,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-10-15 16:23:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 16:23:41,632 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:41,632 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:41,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-15 16:23:41,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:41,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1266680609, now seen corresponding path program 1 times [2022-10-15 16:23:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:41,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936924247] [2022-10-15 16:23:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:41,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:41,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417024341] [2022-10-15 16:23:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:41,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:41,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:41,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:41,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 16:23:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:41,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 16:23:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:42,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:42,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936924247] [2022-10-15 16:23:42,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417024341] [2022-10-15 16:23:42,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417024341] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:42,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:42,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-10-15 16:23:42,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145913760] [2022-10-15 16:23:42,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:42,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 16:23:42,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 16:23:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:23:42,047 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:42,315 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2022-10-15 16:23:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 16:23:42,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 16:23:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:42,317 INFO L225 Difference]: With dead ends: 148 [2022-10-15 16:23:42,318 INFO L226 Difference]: Without dead ends: 148 [2022-10-15 16:23:42,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:23:42,319 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 293 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:42,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 50 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:23:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-10-15 16:23:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2022-10-15 16:23:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 117 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2022-10-15 16:23:42,336 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 15 [2022-10-15 16:23:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:42,336 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2022-10-15 16:23:42,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2022-10-15 16:23:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 16:23:42,337 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:42,338 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:42,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:42,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:42,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1199770913, now seen corresponding path program 2 times [2022-10-15 16:23:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:42,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247511539] [2022-10-15 16:23:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:42,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:42,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810247072] [2022-10-15 16:23:42,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:23:42,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:42,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:42,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:42,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 16:23:42,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:23:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:23:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 16:23:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:42,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247511539] [2022-10-15 16:23:42,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810247072] [2022-10-15 16:23:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810247072] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:42,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:42,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-10-15 16:23:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762581776] [2022-10-15 16:23:42,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:42,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 16:23:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 16:23:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-10-15 16:23:42,957 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:43,384 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-10-15 16:23:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 16:23:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-15 16:23:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:43,387 INFO L225 Difference]: With dead ends: 292 [2022-10-15 16:23:43,387 INFO L226 Difference]: Without dead ends: 292 [2022-10-15 16:23:43,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=265, Invalid=335, Unknown=0, NotChecked=0, Total=600 [2022-10-15 16:23:43,389 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 349 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:43,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 110 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:23:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-10-15 16:23:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 230. [2022-10-15 16:23:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.2964601769911503) internal successors, (293), 229 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 293 transitions. [2022-10-15 16:23:43,411 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 293 transitions. Word has length 27 [2022-10-15 16:23:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:43,412 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 293 transitions. [2022-10-15 16:23:43,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 293 transitions. [2022-10-15 16:23:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 16:23:43,414 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:43,414 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:43,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:43,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:43,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash 994844961, now seen corresponding path program 3 times [2022-10-15 16:23:43,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:43,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842822936] [2022-10-15 16:23:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:43,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:43,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:43,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285161645] [2022-10-15 16:23:43,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:23:43,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:43,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:43,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 16:23:43,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:23:43,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:23:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 16:23:43,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:43,741 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 [2022-10-15 16:23:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-15 16:23:44,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:23:44,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:44,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842822936] [2022-10-15 16:23:44,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:44,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285161645] [2022-10-15 16:23:44,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285161645] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:23:44,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:23:44,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 16:23:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757819845] [2022-10-15 16:23:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:23:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:23:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:23:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:23:44,379 INFO L87 Difference]: Start difference. First operand 230 states and 293 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:44,583 INFO L93 Difference]: Finished difference Result 232 states and 293 transitions. [2022-10-15 16:23:44,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:23:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-10-15 16:23:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:44,586 INFO L225 Difference]: With dead ends: 232 [2022-10-15 16:23:44,586 INFO L226 Difference]: Without dead ends: 232 [2022-10-15 16:23:44,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:23:44,588 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:44,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:23:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-10-15 16:23:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2022-10-15 16:23:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.2920353982300885) internal successors, (292), 229 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 292 transitions. [2022-10-15 16:23:44,604 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 292 transitions. Word has length 51 [2022-10-15 16:23:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:44,604 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 292 transitions. [2022-10-15 16:23:44,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 292 transitions. [2022-10-15 16:23:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-15 16:23:44,607 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:44,607 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:44,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:44,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:44,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2105109241, now seen corresponding path program 1 times [2022-10-15 16:23:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:44,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785612786] [2022-10-15 16:23:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:44,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:44,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105438997] [2022-10-15 16:23:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:44,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:44,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:44,849 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:44,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 16:23:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 16:23:44,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:23:45,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:23:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785612786] [2022-10-15 16:23:45,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:45,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105438997] [2022-10-15 16:23:45,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105438997] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:45,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:45,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-10-15 16:23:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415280848] [2022-10-15 16:23:45,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:45,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-15 16:23:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-15 16:23:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 16:23:45,681 INFO L87 Difference]: Start difference. First operand 230 states and 292 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:46,703 INFO L93 Difference]: Finished difference Result 580 states and 622 transitions. [2022-10-15 16:23:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-15 16:23:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-10-15 16:23:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:46,708 INFO L225 Difference]: With dead ends: 580 [2022-10-15 16:23:46,708 INFO L226 Difference]: Without dead ends: 580 [2022-10-15 16:23:46,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 16:23:46,726 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1300 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:46,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 166 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 16:23:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-10-15 16:23:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 454. [2022-10-15 16:23:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.288888888888889) internal successors, (580), 453 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 580 transitions. [2022-10-15 16:23:46,745 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 580 transitions. Word has length 54 [2022-10-15 16:23:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:46,746 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 580 transitions. [2022-10-15 16:23:46,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 580 transitions. [2022-10-15 16:23:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-10-15 16:23:46,750 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:46,750 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:46,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:46,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:46,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 373965561, now seen corresponding path program 2 times [2022-10-15 16:23:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:46,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265740120] [2022-10-15 16:23:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:47,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:47,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238034717] [2022-10-15 16:23:47,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:23:47,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:47,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:47,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:47,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 16:23:47,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:23:47,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:23:47,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-15 16:23:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1400 backedges. 64 proven. 1335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:23:48,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1400 backedges. 64 proven. 1335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:23:49,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265740120] [2022-10-15 16:23:49,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238034717] [2022-10-15 16:23:49,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238034717] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:49,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:49,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-10-15 16:23:49,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353895372] [2022-10-15 16:23:49,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:49,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-10-15 16:23:49,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-10-15 16:23:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-10-15 16:23:49,524 INFO L87 Difference]: Start difference. First operand 454 states and 580 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 66 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:54,314 INFO L93 Difference]: Finished difference Result 1156 states and 1230 transitions. [2022-10-15 16:23:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-10-15 16:23:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 66 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-10-15 16:23:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:54,323 INFO L225 Difference]: With dead ends: 1156 [2022-10-15 16:23:54,323 INFO L226 Difference]: Without dead ends: 1156 [2022-10-15 16:23:54,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4129, Invalid=5183, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 16:23:54,328 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3341 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3341 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:54,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3341 Valid, 281 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-15 16:23:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-10-15 16:23:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 902. [2022-10-15 16:23:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 898 states have (on average 1.287305122494432) internal successors, (1156), 901 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1156 transitions. [2022-10-15 16:23:54,358 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1156 transitions. Word has length 102 [2022-10-15 16:23:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:54,358 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1156 transitions. [2022-10-15 16:23:54,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 66 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1156 transitions. [2022-10-15 16:23:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-10-15 16:23:54,362 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:54,363 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:54,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:54,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-15 16:23:54,576 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:23:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1438380793, now seen corresponding path program 3 times [2022-10-15 16:23:54,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:54,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289863864] [2022-10-15 16:23:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:54,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:54,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:54,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814569837] [2022-10-15 16:23:54,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:23:54,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:54,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:54,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 16:23:54,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:23:54,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:23:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:23:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:54,816 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 11 treesize of output 10 [2022-10-15 16:23:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5864 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-10-15 16:23:56,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:23:56,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289863864] [2022-10-15 16:23:56,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814569837] [2022-10-15 16:23:56,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814569837] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:23:56,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:23:56,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 16:23:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095015863] [2022-10-15 16:23:56,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:23:56,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:23:56,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:23:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:23:56,550 INFO L87 Difference]: Start difference. First operand 902 states and 1156 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:23:59,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-10-15 16:24:01,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-10-15 16:24:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:01,170 INFO L93 Difference]: Finished difference Result 1729 states and 2287 transitions. [2022-10-15 16:24:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:24:01,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2022-10-15 16:24:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:01,180 INFO L225 Difference]: With dead ends: 1729 [2022-10-15 16:24:01,180 INFO L226 Difference]: Without dead ends: 1729 [2022-10-15 16:24:01,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:24:01,181 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:01,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 41 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-10-15 16:24:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-10-15 16:24:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 909. [2022-10-15 16:24:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 905 states have (on average 1.2839779005524863) internal successors, (1162), 908 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:24:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1162 transitions. [2022-10-15 16:24:01,208 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1162 transitions. Word has length 198 [2022-10-15 16:24:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:01,209 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1162 transitions. [2022-10-15 16:24:01,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:24:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1162 transitions. [2022-10-15 16:24:01,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-10-15 16:24:01,212 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:01,212 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:01,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 16:24:01,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:01,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 16:24:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1639053637, now seen corresponding path program 1 times [2022-10-15 16:24:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:01,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078338361] [2022-10-15 16:24:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:01,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:01,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:01,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488104013] [2022-10-15 16:24:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:01,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:01,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:24:01,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 16:24:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-15 16:24:01,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5737 backedges. 2 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:24:04,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5737 backedges. 2 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:24:17,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:17,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078338361] [2022-10-15 16:24:17,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:17,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488104013] [2022-10-15 16:24:17,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488104013] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:24:17,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:24:17,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 130 [2022-10-15 16:24:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124866162] [2022-10-15 16:24:17,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:24:17,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-10-15 16:24:17,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:17,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-10-15 16:24:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8259, Invalid=8511, Unknown=0, NotChecked=0, Total=16770 [2022-10-15 16:24:17,232 INFO L87 Difference]: Start difference. First operand 909 states and 1162 transitions. Second operand has 130 states, 130 states have (on average 2.9923076923076923) internal successors, (389), 130 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)