/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/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:22:21,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:22:21,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:22:21,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:22:21,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:22:21,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:22:21,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:22:21,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:22:21,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:22:21,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:22:21,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:22:21,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:22:21,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:22:21,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:22:21,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:22:21,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:22:21,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:22:21,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:22:21,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:22:21,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:22:21,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:22:21,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:22:21,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:22:21,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:22:21,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:22:21,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:22:21,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:22:21,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:22:21,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:22:21,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:22:21,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:22:21,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:22:21,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:22:21,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:22:21,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:22:21,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:22:21,693 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 16:22:21,751 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:22:21,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:22:21,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:22:21,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:22:21,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:22:21,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:22:21,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:22:21,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:22:21,759 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:22:21,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:22:21,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:22:21,761 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:22:21,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:22:21,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:22:21,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:22:21,762 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:22:21,762 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:22:21,762 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:22:21,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:22:21,763 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:22:21,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:22:21,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:22:21,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:22:21,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:22:21,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:22:21,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:22:21,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:22:21,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:22:21,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:22:21,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:22:21,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:22:22,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:22:22,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:22:22,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:22:22,211 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:22:22,212 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:22:22,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-10-15 16:22:22,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76ab19131/8d31be7a8cdb41aa813b37cdb2dfcdbe/FLAGd0524f8b3 [2022-10-15 16:22:23,011 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:22:23,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-10-15 16:22:23,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76ab19131/8d31be7a8cdb41aa813b37cdb2dfcdbe/FLAGd0524f8b3 [2022-10-15 16:22:23,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76ab19131/8d31be7a8cdb41aa813b37cdb2dfcdbe [2022-10-15 16:22:23,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:22:23,371 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:22:23,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:22:23,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:22:23,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:22:23,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b8a28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23, skipping insertion in model container [2022-10-15 16:22:23,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:22:23,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:22:23,645 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/add-2-n-u.c[321,334] [2022-10-15 16:22:23,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:22:23,712 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:22:23,730 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/add-2-n-u.c[321,334] [2022-10-15 16:22:23,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:22:23,780 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:22:23,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23 WrapperNode [2022-10-15 16:22:23,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:22:23,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:22:23,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:22:23,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:22:23,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,830 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-10-15 16:22:23,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:22:23,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:22:23,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:22:23,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:22:23,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,865 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:22:23,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:22:23,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:22:23,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:22:23,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (1/1) ... [2022-10-15 16:22:23,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:22:23,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:23,916 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 16:22:23,935 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 16:22:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:22:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:22:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:22:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:22:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:22:23,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:22:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:22:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:22:24,077 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:22:24,080 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:22:24,427 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:22:24,435 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:22:24,436 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-15 16:22:24,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:22:24 BoogieIcfgContainer [2022-10-15 16:22:24,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:22:24,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:22:24,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:22:24,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:22:24,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:22:23" (1/3) ... [2022-10-15 16:22:24,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f41d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:22:24, skipping insertion in model container [2022-10-15 16:22:24,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:23" (2/3) ... [2022-10-15 16:22:24,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f41d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:22:24, skipping insertion in model container [2022-10-15 16:22:24,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:22:24" (3/3) ... [2022-10-15 16:22:24,449 INFO L112 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2022-10-15 16:22:24,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:22:24,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-10-15 16:22:24,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:22:24,559 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;@13b1c3bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:22:24,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-10-15 16:22:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 31 states have (on average 2.0) internal successors, (62), 49 states have internal predecessors, (62), 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 16:22:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:22:24,576 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:24,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:22:24,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash 28699946, now seen corresponding path program 1 times [2022-10-15 16:22:24,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:24,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141099423] [2022-10-15 16:22:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:24,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:24,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700021021] [2022-10-15 16:22:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:24,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:24,731 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 16:22:24,753 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 16:22:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:24,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:22:24,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:24,969 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-10-15 16:22:24,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 34 [2022-10-15 16:22:24,996 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 16:22:24,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:24,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:24,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141099423] [2022-10-15 16:22:24,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700021021] [2022-10-15 16:22:24,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700021021] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:24,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:24,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:22:25,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081729763] [2022-10-15 16:22:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:25,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:22:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:22:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:22:25,051 INFO L87 Difference]: Start difference. First operand has 50 states, 31 states have (on average 2.0) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 16:22:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:25,140 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-10-15 16:22:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:22:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-10-15 16:22:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:25,160 INFO L225 Difference]: With dead ends: 47 [2022-10-15 16:22:25,161 INFO L226 Difference]: Without dead ends: 45 [2022-10-15 16:22:25,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 16:22:25,173 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:25,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-15 16:22:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-15 16:22:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-10-15 16:22:25,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 5 [2022-10-15 16:22:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:25,230 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-10-15 16:22:25,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 16:22:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-10-15 16:22:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:22:25,231 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:25,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:22:25,274 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 16:22:25,446 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 16:22:25,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:25,450 INFO L85 PathProgramCache]: Analyzing trace with hash 28699947, now seen corresponding path program 1 times [2022-10-15 16:22:25,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:25,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448205382] [2022-10-15 16:22:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:25,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:25,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:25,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378263312] [2022-10-15 16:22:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:25,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:25,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:25,468 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 16:22:25,474 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 16:22:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:25,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 16:22:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:25,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:25,659 INFO L356 Elim1Store]: treesize reduction 20, result has 53.5 percent of original size [2022-10-15 16:22:25,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2022-10-15 16:22:25,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 16:22:25,954 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 16:22:25,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:25,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:25,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448205382] [2022-10-15 16:22:25,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:25,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378263312] [2022-10-15 16:22:25,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378263312] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:25,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:25,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:22:25,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662727467] [2022-10-15 16:22:25,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:25,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:22:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:25,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:22:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:25,959 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 16:22:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:25,968 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-10-15 16:22:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:22:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-10-15 16:22:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:25,970 INFO L225 Difference]: With dead ends: 48 [2022-10-15 16:22:25,970 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 16:22:25,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:25,972 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:25,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-10-15 16:22:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 16:22:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-15 16:22:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 states have internal predecessors, (55), 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 16:22:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-10-15 16:22:25,981 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 5 [2022-10-15 16:22:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:25,982 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-10-15 16:22:25,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 16:22:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-10-15 16:22:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 16:22:25,983 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:25,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:26,011 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 16:22:26,197 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 16:22:26,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1809497778, now seen corresponding path program 1 times [2022-10-15 16:22:26,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:26,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532296866] [2022-10-15 16:22:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:26,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:26,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:26,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253827040] [2022-10-15 16:22:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:26,236 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 16:22:26,243 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 16:22:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 16:22:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:26,310 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 16:22:26,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:26,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532296866] [2022-10-15 16:22:26,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253827040] [2022-10-15 16:22:26,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253827040] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:26,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:26,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:22:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561925762] [2022-10-15 16:22:26,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:26,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:22:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:22:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:22:26,315 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 16:22:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:26,376 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-10-15 16:22:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:22:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 16:22:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:26,378 INFO L225 Difference]: With dead ends: 57 [2022-10-15 16:22:26,378 INFO L226 Difference]: Without dead ends: 57 [2022-10-15 16:22:26,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 16:22:26,381 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:26,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-15 16:22:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2022-10-15 16:22:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 47 states have internal predecessors, (54), 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 16:22:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-10-15 16:22:26,393 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 7 [2022-10-15 16:22:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:26,394 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-10-15 16:22:26,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 16:22:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-10-15 16:22:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 16:22:26,397 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:26,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:26,432 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 16:22:26,610 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 16:22:26,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:26,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1810844139, now seen corresponding path program 1 times [2022-10-15 16:22:26,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:26,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488032737] [2022-10-15 16:22:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:26,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:26,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:26,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766375673] [2022-10-15 16:22:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:26,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:26,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:26,630 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 16:22:26,648 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 16:22:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:22:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:26,778 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-10-15 16:22:26,780 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 2 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 16:22:26,832 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 16:22:26,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:26,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:26,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488032737] [2022-10-15 16:22:26,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:26,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766375673] [2022-10-15 16:22:26,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766375673] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:26,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:26,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:22:26,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420515946] [2022-10-15 16:22:26,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:22:26,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:22:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:22:26,839 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 16:22:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:26,906 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-10-15 16:22:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:22:26,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 16:22:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:26,908 INFO L225 Difference]: With dead ends: 45 [2022-10-15 16:22:26,908 INFO L226 Difference]: Without dead ends: 45 [2022-10-15 16:22:26,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 16:22:26,913 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:26,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 33 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-15 16:22:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-15 16:22:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 44 states have internal predecessors, (51), 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 16:22:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-10-15 16:22:26,928 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 7 [2022-10-15 16:22:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:26,928 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-10-15 16:22:26,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 16:22:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-10-15 16:22:26,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 16:22:26,929 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:26,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:26,969 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 16:22:27,142 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 16:22:27,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1810844140, now seen corresponding path program 1 times [2022-10-15 16:22:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:27,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166627627] [2022-10-15 16:22:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:27,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:27,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800584930] [2022-10-15 16:22:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:27,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:27,169 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 16:22:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:27,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 16:22:27,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:27,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 16:22:27,319 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 16:22:27,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 16:22:27,589 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 16:22:27,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:27,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166627627] [2022-10-15 16:22:27,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800584930] [2022-10-15 16:22:27,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800584930] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:27,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:27,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:22:27,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18934045] [2022-10-15 16:22:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:27,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:22:27,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:22:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:27,598 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 16:22:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:27,617 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-10-15 16:22:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:22:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 16:22:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:27,619 INFO L225 Difference]: With dead ends: 47 [2022-10-15 16:22:27,622 INFO L226 Difference]: Without dead ends: 47 [2022-10-15 16:22:27,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:27,624 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:27,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2022-10-15 16:22:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-15 16:22:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-15 16:22:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-10-15 16:22:27,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 7 [2022-10-15 16:22:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:27,644 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-10-15 16:22:27,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 16:22:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-10-15 16:22:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 16:22:27,645 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:27,645 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:27,679 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 16:22:27,845 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 16:22:27,847 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash 300061464, now seen corresponding path program 1 times [2022-10-15 16:22:27,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:27,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420180355] [2022-10-15 16:22:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:27,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:27,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:27,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546091734] [2022-10-15 16:22:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:27,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:27,861 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 16:22:27,866 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 16:22:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 16:22:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:27,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:27,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:27,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420180355] [2022-10-15 16:22:27,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:27,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546091734] [2022-10-15 16:22:27,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546091734] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:27,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:27,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:22:27,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311560849] [2022-10-15 16:22:27,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:27,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:22:27,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:22:27,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:27,950 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 16:22:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:28,047 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-10-15 16:22:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:22:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 16:22:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:28,049 INFO L225 Difference]: With dead ends: 82 [2022-10-15 16:22:28,049 INFO L226 Difference]: Without dead ends: 82 [2022-10-15 16:22:28,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:28,051 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:28,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 38 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-15 16:22:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2022-10-15 16:22:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 49 states have internal predecessors, (55), 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 16:22:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-10-15 16:22:28,058 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 8 [2022-10-15 16:22:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:28,058 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-10-15 16:22:28,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 16:22:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-10-15 16:22:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 16:22:28,059 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:28,059 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:28,106 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 16:22:28,273 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 16:22:28,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:28,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2068504949, now seen corresponding path program 1 times [2022-10-15 16:22:28,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:28,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166059594] [2022-10-15 16:22:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:28,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:28,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:28,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418885340] [2022-10-15 16:22:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:28,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:28,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:28,290 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 16:22:28,301 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 16:22:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2022-10-15 16:22:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:28,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:28,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:28,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 16:22:28,445 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 16:22:28,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 16:22:28,749 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 16:22:28,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:28,934 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 16:22:28,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166059594] [2022-10-15 16:22:28,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418885340] [2022-10-15 16:22:28,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418885340] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:28,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:28,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-10-15 16:22:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281027591] [2022-10-15 16:22:28,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 16:22:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 16:22:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:22:28,938 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 16:22:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:29,105 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-10-15 16:22:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:22:29,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 10 [2022-10-15 16:22:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:29,106 INFO L225 Difference]: With dead ends: 59 [2022-10-15 16:22:29,107 INFO L226 Difference]: Without dead ends: 59 [2022-10-15 16:22:29,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:22:29,108 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:29,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 67 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-10-15 16:22:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-15 16:22:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-10-15 16:22:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.434782608695652) internal successors, (66), 57 states have internal predecessors, (66), 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 16:22:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-10-15 16:22:29,114 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 10 [2022-10-15 16:22:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:29,115 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-10-15 16:22:29,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 16:22:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-10-15 16:22:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 16:22:29,116 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:29,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:29,153 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 16:22:29,329 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 16:22:29,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash -736603210, now seen corresponding path program 1 times [2022-10-15 16:22:29,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:29,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752554553] [2022-10-15 16:22:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:29,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:29,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615847676] [2022-10-15 16:22:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:29,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:29,348 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 16:22:29,355 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 16:22:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-15 16:22:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:29,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:29,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:29,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 16:22:29,471 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 16:22:29,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 16:22:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:29,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:30,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:30,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752554553] [2022-10-15 16:22:30,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:30,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615847676] [2022-10-15 16:22:30,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615847676] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:30,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:30,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-10-15 16:22:30,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170445522] [2022-10-15 16:22:30,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:30,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 16:22:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 16:22:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:22:30,232 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 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 16:22:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:30,479 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-10-15 16:22:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:22:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 16:22:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:30,482 INFO L225 Difference]: With dead ends: 64 [2022-10-15 16:22:30,482 INFO L226 Difference]: Without dead ends: 64 [2022-10-15 16:22:30,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:22:30,484 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:30,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 85 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-10-15 16:22:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-15 16:22:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-10-15 16:22:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.411764705882353) internal successors, (72), 62 states have internal predecessors, (72), 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 16:22:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-10-15 16:22:30,491 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 12 [2022-10-15 16:22:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:30,491 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-10-15 16:22:30,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 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 16:22:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-10-15 16:22:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 16:22:30,492 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:30,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:30,534 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 16:22:30,705 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 16:22:30,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1361395058, now seen corresponding path program 1 times [2022-10-15 16:22:30,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:30,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712098197] [2022-10-15 16:22:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:30,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:30,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113463694] [2022-10-15 16:22:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:30,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:30,722 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 16:22:30,737 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 16:22:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:22:30,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:30,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712098197] [2022-10-15 16:22:30,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113463694] [2022-10-15 16:22:30,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113463694] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:30,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:30,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-10-15 16:22:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607726881] [2022-10-15 16:22:30,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 16:22:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 16:22:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:22:30,844 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 16:22:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:31,029 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-10-15 16:22:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:22:31,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-15 16:22:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:31,031 INFO L225 Difference]: With dead ends: 160 [2022-10-15 16:22:31,031 INFO L226 Difference]: Without dead ends: 160 [2022-10-15 16:22:31,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:22:31,032 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 285 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:31,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 62 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:22:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-10-15 16:22:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2022-10-15 16:22:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.490566037735849) internal successors, (158), 117 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 158 transitions. [2022-10-15 16:22:31,042 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 158 transitions. Word has length 13 [2022-10-15 16:22:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:31,043 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 158 transitions. [2022-10-15 16:22:31,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 16:22:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 158 transitions. [2022-10-15 16:22:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 16:22:31,044 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:31,044 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1] [2022-10-15 16:22:31,081 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 16:22:31,245 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 16:22:31,245 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1342483253, now seen corresponding path program 2 times [2022-10-15 16:22:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732087698] [2022-10-15 16:22:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:31,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:31,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350394328] [2022-10-15 16:22:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:22:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:31,275 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 16:22:31,299 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 16:22:31,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:22:31,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 16:22:31,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:31,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 16:22:31,424 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 16:22:31,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 16:22:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:32,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:32,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732087698] [2022-10-15 16:22:32,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350394328] [2022-10-15 16:22:32,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350394328] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:32,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:32,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-10-15 16:22:32,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446849107] [2022-10-15 16:22:32,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:32,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 16:22:32,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:32,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 16:22:32,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:22:32,242 INFO L87 Difference]: Start difference. First operand 118 states and 158 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 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 16:22:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:32,563 INFO L93 Difference]: Finished difference Result 137 states and 180 transitions. [2022-10-15 16:22:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 16:22:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 16:22:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:32,565 INFO L225 Difference]: With dead ends: 137 [2022-10-15 16:22:32,565 INFO L226 Difference]: Without dead ends: 137 [2022-10-15 16:22:32,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-10-15 16:22:32,566 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:32,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 94 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 167 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-10-15 16:22:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-10-15 16:22:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-10-15 16:22:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.4508196721311475) internal successors, (177), 133 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 177 transitions. [2022-10-15 16:22:32,579 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 177 transitions. Word has length 20 [2022-10-15 16:22:32,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:32,579 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 177 transitions. [2022-10-15 16:22:32,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 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 16:22:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 177 transitions. [2022-10-15 16:22:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 16:22:32,580 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:32,581 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2022-10-15 16:22:32,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 16:22:32,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 16:22:32,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1681381016, now seen corresponding path program 2 times [2022-10-15 16:22:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796204111] [2022-10-15 16:22:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:32,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:32,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728787877] [2022-10-15 16:22:32,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:22:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:32,815 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:32,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 16:22:32,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:22:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 16:22:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:33,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:33,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:33,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796204111] [2022-10-15 16:22:33,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:33,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728787877] [2022-10-15 16:22:33,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728787877] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:33,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:33,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-10-15 16:22:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420409709] [2022-10-15 16:22:33,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:33,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 16:22:33,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 16:22:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:22:33,094 INFO L87 Difference]: Start difference. First operand 134 states and 177 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 16:22:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:33,593 INFO L93 Difference]: Finished difference Result 364 states and 374 transitions. [2022-10-15 16:22:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 16:22:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 28 [2022-10-15 16:22:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:33,596 INFO L225 Difference]: With dead ends: 364 [2022-10-15 16:22:33,596 INFO L226 Difference]: Without dead ends: 364 [2022-10-15 16:22:33,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-10-15 16:22:33,597 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 739 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:33,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 123 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:22:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-10-15 16:22:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 250. [2022-10-15 16:22:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 238 states have (on average 1.504201680672269) internal successors, (358), 249 states have internal predecessors, (358), 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 16:22:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 358 transitions. [2022-10-15 16:22:33,609 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 358 transitions. Word has length 28 [2022-10-15 16:22:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:33,610 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 358 transitions. [2022-10-15 16:22:33,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 16:22:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 358 transitions. [2022-10-15 16:22:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-15 16:22:33,611 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:33,611 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1] [2022-10-15 16:22:33,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 16:22:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-15 16:22:33,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1460711093, now seen corresponding path program 3 times [2022-10-15 16:22:33,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:33,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184984461] [2022-10-15 16:22:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:33,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:33,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:33,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481651557] [2022-10-15 16:22:33,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:22:33,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:33,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:33,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:33,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 16:22:33,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:22:33,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-15 16:22:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:33,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:33,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:33,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:33,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 16:22:33,979 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 16:22:33,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 16:22:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-10-15 16:22:34,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184984461] [2022-10-15 16:22:34,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481651557] [2022-10-15 16:22:34,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481651557] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:34,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:34,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 16:22:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978375011] [2022-10-15 16:22:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:34,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:22:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:22:34,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:22:34,663 INFO L87 Difference]: Start difference. First operand 250 states and 358 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:34,667 INFO L93 Difference]: Finished difference Result 250 states and 355 transitions. [2022-10-15 16:22:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:22:34,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-10-15 16:22:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:34,669 INFO L225 Difference]: With dead ends: 250 [2022-10-15 16:22:34,669 INFO L226 Difference]: Without dead ends: 250 [2022-10-15 16:22:34,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:22:34,670 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:34,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-10-15 16:22:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-10-15 16:22:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-10-15 16:22:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 238 states have (on average 1.4915966386554622) internal successors, (355), 249 states have internal predecessors, (355), 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 16:22:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 355 transitions. [2022-10-15 16:22:34,679 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 355 transitions. Word has length 40 [2022-10-15 16:22:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:34,679 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 355 transitions. [2022-10-15 16:22:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 355 transitions. [2022-10-15 16:22:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-15 16:22:34,681 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:34,681 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2022-10-15 16:22:34,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-10-15 16:22:34,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-15 16:22:34,897 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1818438696, now seen corresponding path program 3 times [2022-10-15 16:22:34,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:34,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130962400] [2022-10-15 16:22:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:34,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:34,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:34,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015222358] [2022-10-15 16:22:34,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:22:34,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:34,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:34,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:34,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-15 16:22:35,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:22:35,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:35,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-10-15 16:22:35,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:35,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:35,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 16:22:35,057 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 16:22:35,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 16:22:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-10-15 16:22:35,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-10-15 16:22:36,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:36,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130962400] [2022-10-15 16:22:36,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:36,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015222358] [2022-10-15 16:22:36,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015222358] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:36,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:36,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-10-15 16:22:36,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061573475] [2022-10-15 16:22:36,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:36,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 16:22:36,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 16:22:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:22:36,355 INFO L87 Difference]: Start difference. First operand 250 states and 355 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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 16:22:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:36,464 INFO L93 Difference]: Finished difference Result 309 states and 434 transitions. [2022-10-15 16:22:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 16:22:36,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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 58 [2022-10-15 16:22:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:36,467 INFO L225 Difference]: With dead ends: 309 [2022-10-15 16:22:36,467 INFO L226 Difference]: Without dead ends: 309 [2022-10-15 16:22:36,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:22:36,468 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:36,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-10-15 16:22:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-10-15 16:22:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2022-10-15 16:22:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 295 states have (on average 1.471186440677966) internal successors, (434), 306 states have internal predecessors, (434), 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 16:22:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 434 transitions. [2022-10-15 16:22:36,476 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 434 transitions. Word has length 58 [2022-10-15 16:22:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:36,477 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 434 transitions. [2022-10-15 16:22:36,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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 16:22:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 434 transitions. [2022-10-15 16:22:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-15 16:22:36,478 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:36,478 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:36,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-15 16:22:36,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-15 16:22:36,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash 530755103, now seen corresponding path program 1 times [2022-10-15 16:22:36,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:36,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468460914] [2022-10-15 16:22:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:36,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:36,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465006724] [2022-10-15 16:22:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:36,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:36,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:36,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-15 16:22:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:36,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:22:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:37,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:37,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:37,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468460914] [2022-10-15 16:22:37,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:37,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465006724] [2022-10-15 16:22:37,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465006724] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:37,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:37,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-10-15 16:22:37,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173222809] [2022-10-15 16:22:37,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:37,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-15 16:22:37,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:37,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-15 16:22:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-10-15 16:22:37,350 INFO L87 Difference]: Start difference. First operand 307 states and 434 transitions. Second operand has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:38,540 INFO L93 Difference]: Finished difference Result 889 states and 942 transitions. [2022-10-15 16:22:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-15 16:22:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-10-15 16:22:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:38,546 INFO L225 Difference]: With dead ends: 889 [2022-10-15 16:22:38,546 INFO L226 Difference]: Without dead ends: 889 [2022-10-15 16:22:38,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 16:22:38,548 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1592 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:38,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1592 Valid, 216 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 16:22:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-10-15 16:22:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 631. [2022-10-15 16:22:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 619 states have (on average 1.4765751211631664) internal successors, (914), 630 states have internal predecessors, (914), 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 16:22:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 914 transitions. [2022-10-15 16:22:38,568 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 914 transitions. Word has length 60 [2022-10-15 16:22:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:38,569 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 914 transitions. [2022-10-15 16:22:38,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 914 transitions. [2022-10-15 16:22:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-10-15 16:22:38,571 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:38,571 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:38,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-15 16:22:38,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:38,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1145309025, now seen corresponding path program 2 times [2022-10-15 16:22:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:38,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238359921] [2022-10-15 16:22:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:38,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:38,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309303740] [2022-10-15 16:22:38,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:22:38,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:38,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:38,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:38,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-15 16:22:38,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:22:38,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 16:22:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:38,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:38,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 16:22:39,007 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 16:22:39,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 16:22:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2022-10-15 16:22:40,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238359921] [2022-10-15 16:22:40,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309303740] [2022-10-15 16:22:40,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309303740] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:40,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:40,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:22:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756627151] [2022-10-15 16:22:40,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:40,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:22:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:22:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:22:40,526 INFO L87 Difference]: Start difference. First operand 631 states and 914 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 16:22:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:40,531 INFO L93 Difference]: Finished difference Result 634 states and 918 transitions. [2022-10-15 16:22:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:22:40,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 120 [2022-10-15 16:22:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:40,534 INFO L225 Difference]: With dead ends: 634 [2022-10-15 16:22:40,535 INFO L226 Difference]: Without dead ends: 634 [2022-10-15 16:22:40,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 116 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 16:22:40,536 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:40,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-10-15 16:22:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-10-15 16:22:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2022-10-15 16:22:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 622 states have (on average 1.4758842443729903) internal successors, (918), 633 states have internal predecessors, (918), 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 16:22:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 918 transitions. [2022-10-15 16:22:40,551 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 918 transitions. Word has length 120 [2022-10-15 16:22:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:40,551 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 918 transitions. [2022-10-15 16:22:40,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 16:22:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 918 transitions. [2022-10-15 16:22:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-10-15 16:22:40,553 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:40,553 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 2, 1, 1, 1, 1, 1] [2022-10-15 16:22:40,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-10-15 16:22:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 16:22:40,768 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1143962663, now seen corresponding path program 1 times [2022-10-15 16:22:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:40,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122540622] [2022-10-15 16:22:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:40,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:40,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242588743] [2022-10-15 16:22:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:40,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:40,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:40,804 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:40,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-15 16:22:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:40,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 16:22:40,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 90 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:41,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 90 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:42,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:42,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122540622] [2022-10-15 16:22:42,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:22:42,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242588743] [2022-10-15 16:22:42,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242588743] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:42,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:22:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-10-15 16:22:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31788325] [2022-10-15 16:22:42,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:42,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-10-15 16:22:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:42,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-10-15 16:22:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-10-15 16:22:42,785 INFO L87 Difference]: Start difference. First operand 634 states and 918 transitions. Second operand has 50 states, 50 states have (on average 4.66) internal successors, (233), 50 states have internal predecessors, (233), 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 16:22:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:46,791 INFO L93 Difference]: Finished difference Result 1827 states and 1928 transitions. [2022-10-15 16:22:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-10-15 16:22:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.66) internal successors, (233), 50 states have internal predecessors, (233), 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 120 [2022-10-15 16:22:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:46,803 INFO L225 Difference]: With dead ends: 1827 [2022-10-15 16:22:46,803 INFO L226 Difference]: Without dead ends: 1827 [2022-10-15 16:22:46,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-10-15 16:22:46,808 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4368 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4368 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:46,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4368 Valid, 401 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-15 16:22:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-10-15 16:22:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1282. [2022-10-15 16:22:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1270 states have (on average 1.478740157480315) internal successors, (1878), 1281 states have internal predecessors, (1878), 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 16:22:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1878 transitions. [2022-10-15 16:22:46,855 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1878 transitions. Word has length 120 [2022-10-15 16:22:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:46,856 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1878 transitions. [2022-10-15 16:22:46,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.66) internal successors, (233), 50 states have internal predecessors, (233), 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 16:22:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1878 transitions. [2022-10-15 16:22:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-10-15 16:22:46,862 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:46,862 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 46, 46, 2, 1, 1, 1, 1, 1] [2022-10-15 16:22:46,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-15 16:22:47,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-15 16:22:47,076 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:22:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash 230873305, now seen corresponding path program 2 times [2022-10-15 16:22:47,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:47,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908113774] [2022-10-15 16:22:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:47,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:47,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:22:47,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676366200] [2022-10-15 16:22:47,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:22:47,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:47,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:47,145 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:22:47,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-15 16:22:47,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:22:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 16:22:47,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:47,342 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-10-15 16:22:47,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-10-15 16:22:47,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-10-15 16:23:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5407 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 5315 trivial. 0 not checked. [2022-10-15 16:23:03,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5407 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 5315 trivial. 0 not checked. [2022-10-15 16:23:07,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:07,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908113774] [2022-10-15 16:23:07,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:07,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676366200] [2022-10-15 16:23:07,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676366200] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:07,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:07,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-10-15 16:23:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567352407] [2022-10-15 16:23:07,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:23:07,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:23:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:23:07,730 INFO L87 Difference]: Start difference. First operand 1282 states and 1878 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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 16:23:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:09,291 INFO L93 Difference]: Finished difference Result 1279 states and 1694 transitions. [2022-10-15 16:23:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:23:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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 240 [2022-10-15 16:23:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:09,299 INFO L225 Difference]: With dead ends: 1279 [2022-10-15 16:23:09,300 INFO L226 Difference]: Without dead ends: 1279 [2022-10-15 16:23:09,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 474 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-15 16:23:09,301 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:09,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 26 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 30 Unchecked, 0.8s Time] [2022-10-15 16:23:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-10-15 16:23:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2022-10-15 16:23:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1270 states have (on average 1.3338582677165354) internal successors, (1694), 1278 states have internal predecessors, (1694), 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 16:23:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1694 transitions. [2022-10-15 16:23:09,328 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1694 transitions. Word has length 240 [2022-10-15 16:23:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:09,328 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1694 transitions. [2022-10-15 16:23:09,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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 16:23:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1694 transitions. [2022-10-15 16:23:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-10-15 16:23:09,332 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:09,332 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:09,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-10-15 16:23:09,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-15 16:23:09,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-15 16:23:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:09,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1530775269, now seen corresponding path program 1 times [2022-10-15 16:23:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360949317] [2022-10-15 16:23:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:09,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:09,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907805191] [2022-10-15 16:23:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:09,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:09,632 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:09,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-15 16:23:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 49 conjunts are in the unsatisfiable core [2022-10-15 16:23:09,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5222 backedges. 1 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:12,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5222 backedges. 1 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360949317] [2022-10-15 16:23:17,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907805191] [2022-10-15 16:23:17,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907805191] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:17,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:17,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-10-15 16:23:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855358973] [2022-10-15 16:23:17,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:17,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-10-15 16:23:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-10-15 16:23:17,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-10-15 16:23:17,366 INFO L87 Difference]: Start difference. First operand 1279 states and 1694 transitions. Second operand has 98 states, 98 states have (on average 4.846938775510204) internal successors, (475), 98 states have internal predecessors, (475), 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)