./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:09:01,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:09:01,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:09:01,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:09:01,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:09:01,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:09:01,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:09:01,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:09:01,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:09:01,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:09:01,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:09:01,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:09:01,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:09:01,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:09:01,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:09:01,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:09:01,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:09:01,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:09:01,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:09:01,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:09:01,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:09:01,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:09:01,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:09:01,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:09:01,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:09:01,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:09:01,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:09:01,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:09:01,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:09:01,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:09:01,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:09:01,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:09:01,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:09:01,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:09:01,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:09:01,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:09:01,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:09:01,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:09:01,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:09:01,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:09:01,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:09:01,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:09:01,967 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:09:01,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:09:01,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:09:01,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:09:01,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:09:01,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:09:01,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:09:01,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:09:01,969 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:09:01,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:09:01,970 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:09:01,970 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:09:01,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:09:01,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:09:01,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:09:01,970 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:09:01,971 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:09:01,971 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:09:01,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:09:01,971 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:09:01,971 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:09:01,971 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:09:01,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:09:01,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:09:01,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:09:01,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:09:01,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:09:01,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:09:01,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:09:01,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:09:01,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:09:01,973 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:09:01,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:09:01,973 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:09:01,973 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2023-02-18 20:09:02,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:09:02,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:09:02,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:09:02,237 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:09:02,237 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:09:02,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-02-18 20:09:03,175 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:09:03,365 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:09:03,365 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-02-18 20:09:03,378 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d07c5050/1c549678f4ae44c898fa5f8c5fc365fe/FLAG3c1e324d4 [2023-02-18 20:09:03,387 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d07c5050/1c549678f4ae44c898fa5f8c5fc365fe [2023-02-18 20:09:03,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:09:03,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:09:03,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:09:03,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:09:03,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:09:03,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@619cac90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03, skipping insertion in model container [2023-02-18 20:09:03,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:09:03,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:09:03,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:09:03,630 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:09:03,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:09:03,684 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:09:03,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03 WrapperNode [2023-02-18 20:09:03,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:09:03,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:09:03,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:09:03,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:09:03,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,718 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2023-02-18 20:09:03,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:09:03,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:09:03,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:09:03,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:09:03,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:09:03,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:09:03,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:09:03,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:09:03,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (1/1) ... [2023-02-18 20:09:03,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:09:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:03,765 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) [2023-02-18 20:09:03,774 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 [2023-02-18 20:09:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 20:09:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 20:09:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 20:09:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:09:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:09:03,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:09:03,899 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:09:03,905 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:09:04,050 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:09:04,061 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:09:04,061 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 20:09:04,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:09:04 BoogieIcfgContainer [2023-02-18 20:09:04,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:09:04,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:09:04,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:09:04,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:09:04,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:09:03" (1/3) ... [2023-02-18 20:09:04,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fad815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:09:04, skipping insertion in model container [2023-02-18 20:09:04,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:03" (2/3) ... [2023-02-18 20:09:04,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fad815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:09:04, skipping insertion in model container [2023-02-18 20:09:04,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:09:04" (3/3) ... [2023-02-18 20:09:04,068 INFO L112 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2023-02-18 20:09:04,080 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:09:04,080 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-02-18 20:09:04,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:09:04,112 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=PETRI_NET, 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;@36a7b2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:09:04,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-02-18 20:09:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:09:04,119 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:04,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:09:04,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:04,124 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2023-02-18 20:09:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:04,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138225351] [2023-02-18 20:09:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:04,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:04,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:04,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138225351] [2023-02-18 20:09:04,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138225351] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:04,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:04,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:09:04,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262516779] [2023-02-18 20:09:04,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:04,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:09:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:09:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:04,324 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:04,355 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-02-18 20:09:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:09:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:09:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:04,362 INFO L225 Difference]: With dead ends: 58 [2023-02-18 20:09:04,362 INFO L226 Difference]: Without dead ends: 54 [2023-02-18 20:09:04,364 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 [2023-02-18 20:09:04,366 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:04,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-18 20:09:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2023-02-18 20:09:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 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) [2023-02-18 20:09:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-02-18 20:09:04,393 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2023-02-18 20:09:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:04,393 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-02-18 20:09:04,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-02-18 20:09:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:09:04,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:04,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:09:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:09:04,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2023-02-18 20:09:04,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897398825] [2023-02-18 20:09:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:04,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897398825] [2023-02-18 20:09:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897398825] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:04,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:04,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:09:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807151089] [2023-02-18 20:09:04,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:09:04,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:09:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:09:04,470 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:04,492 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-02-18 20:09:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:09:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:09:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:04,493 INFO L225 Difference]: With dead ends: 31 [2023-02-18 20:09:04,493 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 20:09:04,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:09:04,496 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:04,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 20:09:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 20:09:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 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) [2023-02-18 20:09:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-02-18 20:09:04,510 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2023-02-18 20:09:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:04,511 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-02-18 20:09:04,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-02-18 20:09:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:09:04,512 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:04,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:09:04,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 20:09:04,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:04,515 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2023-02-18 20:09:04,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:04,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006038235] [2023-02-18 20:09:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:04,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:04,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006038235] [2023-02-18 20:09:04,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006038235] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:04,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:04,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:09:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294306739] [2023-02-18 20:09:04,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:04,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:09:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:09:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:04,651 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:04,702 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-02-18 20:09:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:09:04,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:09:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:04,705 INFO L225 Difference]: With dead ends: 50 [2023-02-18 20:09:04,705 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 20:09:04,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:04,707 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:04,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 20:09:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2023-02-18 20:09:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-18 20:09:04,710 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2023-02-18 20:09:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:04,711 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-18 20:09:04,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-18 20:09:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-18 20:09:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:09:04,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:04,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:09:04,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 20:09:04,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:04,713 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2023-02-18 20:09:04,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:04,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865640581] [2023-02-18 20:09:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:04,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865640581] [2023-02-18 20:09:04,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865640581] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:04,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:04,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:09:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572950449] [2023-02-18 20:09:04,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:04,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:09:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:09:04,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:09:04,852 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:04,930 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-02-18 20:09:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:09:04,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:09:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:04,932 INFO L225 Difference]: With dead ends: 56 [2023-02-18 20:09:04,932 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 20:09:04,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:09:04,938 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:04,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 20:09:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2023-02-18 20:09:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-18 20:09:04,945 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2023-02-18 20:09:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:04,945 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-18 20:09:04,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-18 20:09:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:09:04,946 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:04,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:09:04,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 20:09:04,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2023-02-18 20:09:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585169499] [2023-02-18 20:09:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:05,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:05,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585169499] [2023-02-18 20:09:05,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585169499] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:05,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:05,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:09:05,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309910651] [2023-02-18 20:09:05,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:05,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:09:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:09:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:09:05,019 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:05,044 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-18 20:09:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:09:05,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:09:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:05,045 INFO L225 Difference]: With dead ends: 33 [2023-02-18 20:09:05,045 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 20:09:05,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:09:05,048 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:05,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:05,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 20:09:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-02-18 20:09:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 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) [2023-02-18 20:09:05,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-18 20:09:05,054 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-18 20:09:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:05,055 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-18 20:09:05,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-18 20:09:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 20:09:05,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:05,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:05,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 20:09:05,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2023-02-18 20:09:05,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:05,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002220193] [2023-02-18 20:09:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:05,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:05,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002220193] [2023-02-18 20:09:05,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002220193] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:05,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:05,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:09:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776538202] [2023-02-18 20:09:05,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:05,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:09:05,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:09:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:05,123 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2023-02-18 20:09:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:05,150 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-02-18 20:09:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:09:05,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2023-02-18 20:09:05,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:05,153 INFO L225 Difference]: With dead ends: 29 [2023-02-18 20:09:05,153 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 20:09:05,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:09:05,154 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:05,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 20:09:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-18 20:09:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 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) [2023-02-18 20:09:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-18 20:09:05,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2023-02-18 20:09:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:05,165 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-18 20:09:05,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2023-02-18 20:09:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-18 20:09:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 20:09:05,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:05,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:05,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 20:09:05,166 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2023-02-18 20:09:05,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:05,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766640550] [2023-02-18 20:09:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:05,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:05,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766640550] [2023-02-18 20:09:05,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766640550] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:05,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:05,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:09:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918927490] [2023-02-18 20:09:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:09:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:09:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:09:05,349 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2023-02-18 20:09:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:05,400 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-02-18 20:09:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:09:05,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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 [2023-02-18 20:09:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:05,402 INFO L225 Difference]: With dead ends: 41 [2023-02-18 20:09:05,402 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 20:09:05,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:09:05,403 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:05,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 20:09:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2023-02-18 20:09:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 states have internal predecessors, (40), 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) [2023-02-18 20:09:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-02-18 20:09:05,409 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 8 [2023-02-18 20:09:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:05,409 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-02-18 20:09:05,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2023-02-18 20:09:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-02-18 20:09:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 20:09:05,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:05,410 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:05,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 20:09:05,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2023-02-18 20:09:05,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:05,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100198469] [2023-02-18 20:09:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:05,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:05,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100198469] [2023-02-18 20:09:05,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100198469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908448101] [2023-02-18 20:09:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:05,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:05,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:05,517 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) [2023-02-18 20:09:05,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 20:09:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 20:09:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:05,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-18 20:09:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:05,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:05,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908448101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:05,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:05,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-18 20:09:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931011088] [2023-02-18 20:09:05,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:05,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 20:09:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 20:09:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-18 20:09:05,839 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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) [2023-02-18 20:09:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:05,975 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-02-18 20:09:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:09:05,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 [2023-02-18 20:09:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:05,976 INFO L225 Difference]: With dead ends: 78 [2023-02-18 20:09:05,976 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 20:09:05,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-02-18 20:09:05,977 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 166 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:05,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 122 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 20:09:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2023-02-18 20:09:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 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) [2023-02-18 20:09:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-18 20:09:05,979 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2023-02-18 20:09:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:05,979 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-18 20:09:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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) [2023-02-18 20:09:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-18 20:09:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 20:09:05,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:05,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:05,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 20:09:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:06,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2023-02-18 20:09:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:06,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480108130] [2023-02-18 20:09:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480108130] [2023-02-18 20:09:06,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480108130] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:06,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:06,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:09:06,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529856501] [2023-02-18 20:09:06,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:09:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:09:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:06,246 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:06,263 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-02-18 20:09:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:09:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 20:09:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:06,264 INFO L225 Difference]: With dead ends: 30 [2023-02-18 20:09:06,264 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 20:09:06,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:06,266 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:06,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 20:09:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-18 20:09:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 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) [2023-02-18 20:09:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-18 20:09:06,271 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2023-02-18 20:09:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:06,272 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-18 20:09:06,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-18 20:09:06,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 20:09:06,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:06,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:06,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 20:09:06,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:06,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2023-02-18 20:09:06,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:06,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333349597] [2023-02-18 20:09:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:06,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:06,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:06,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333349597] [2023-02-18 20:09:06,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333349597] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:06,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:06,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:09:06,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519266809] [2023-02-18 20:09:06,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:06,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:09:06,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:09:06,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:09:06,415 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-02-18 20:09:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:06,465 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-02-18 20:09:06,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 20:09:06,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 [2023-02-18 20:09:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:06,466 INFO L225 Difference]: With dead ends: 31 [2023-02-18 20:09:06,466 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 20:09:06,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:09:06,467 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:06,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 20:09:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 20:09:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 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) [2023-02-18 20:09:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-18 20:09:06,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2023-02-18 20:09:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:06,471 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-18 20:09:06,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-02-18 20:09:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-18 20:09:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 20:09:06,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:06,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:06,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 20:09:06,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2023-02-18 20:09:06,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:06,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822635200] [2023-02-18 20:09:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:06,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822635200] [2023-02-18 20:09:06,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822635200] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:06,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:06,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 20:09:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845549184] [2023-02-18 20:09:06,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:06,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:09:06,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:06,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:09:06,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:09:06,628 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-02-18 20:09:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:06,688 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-02-18 20:09:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:09:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 [2023-02-18 20:09:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:06,689 INFO L225 Difference]: With dead ends: 33 [2023-02-18 20:09:06,689 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 20:09:06,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:09:06,690 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:06,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 72 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 20:09:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-02-18 20:09:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-02-18 20:09:06,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2023-02-18 20:09:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:06,694 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-02-18 20:09:06,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-02-18 20:09:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-02-18 20:09:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 20:09:06,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:06,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:06,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 20:09:06,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2023-02-18 20:09:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:06,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434489445] [2023-02-18 20:09:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:06,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:06,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:06,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434489445] [2023-02-18 20:09:06,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434489445] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:06,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565915173] [2023-02-18 20:09:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:06,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:06,835 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) [2023-02-18 20:09:06,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 20:09:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 20:09:06,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:06,982 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 17 [2023-02-18 20:09:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:07,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565915173] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:07,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:07,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-18 20:09:07,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370177509] [2023-02-18 20:09:07,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:07,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 20:09:07,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:07,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 20:09:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-02-18 20:09:07,010 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:07,106 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-02-18 20:09:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:09:07,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 20:09:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:07,107 INFO L225 Difference]: With dead ends: 36 [2023-02-18 20:09:07,107 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 20:09:07,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-02-18 20:09:07,108 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 133 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:07,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 49 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 20:09:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2023-02-18 20:09:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-18 20:09:07,111 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2023-02-18 20:09:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:07,111 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-18 20:09:07,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-18 20:09:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 20:09:07,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:07,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:07,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:07,319 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,SelfDestructingSolverStorable11 [2023-02-18 20:09:07,320 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2023-02-18 20:09:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:07,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943182941] [2023-02-18 20:09:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:07,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943182941] [2023-02-18 20:09:07,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943182941] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6184097] [2023-02-18 20:09:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:09:07,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:07,533 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) [2023-02-18 20:09:07,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 20:09:07,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:09:07,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 20:09:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:07,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:09:07,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:09:07,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2023-02-18 20:09:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:07,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:08,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 63 [2023-02-18 20:09:08,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:09:08,065 INFO L350 Elim1Store]: Elim1 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 89 treesize of output 94 [2023-02-18 20:09:08,074 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 90 [2023-02-18 20:09:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:08,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6184097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:08,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:08,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-02-18 20:09:08,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572071733] [2023-02-18 20:09:08,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:08,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 20:09:08,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:08,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 20:09:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-02-18 20:09:08,112 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2023-02-18 20:09:10,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:12,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:12,842 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2023-02-18 20:09:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 20:09:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) Word has length 22 [2023-02-18 20:09:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:12,843 INFO L225 Difference]: With dead ends: 87 [2023-02-18 20:09:12,843 INFO L226 Difference]: Without dead ends: 76 [2023-02-18 20:09:12,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=482, Invalid=2274, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 20:09:12,845 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 358 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:12,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 173 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 277 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2023-02-18 20:09:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-18 20:09:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 38. [2023-02-18 20:09:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-02-18 20:09:12,846 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2023-02-18 20:09:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:12,846 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-02-18 20:09:12,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2023-02-18 20:09:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-02-18 20:09:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 20:09:12,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:12,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:12,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 20:09:13,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:13,053 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:13,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2023-02-18 20:09:13,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:13,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927129984] [2023-02-18 20:09:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:13,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927129984] [2023-02-18 20:09:13,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927129984] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:13,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498677589] [2023-02-18 20:09:13,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:09:13,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:13,283 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) [2023-02-18 20:09:13,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 20:09:13,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 20:09:13,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 20:09:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:13,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:13,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-18 20:09:13,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:09:13,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-02-18 20:09:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:14,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:14,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-02-18 20:09:14,384 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2023-02-18 20:09:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:14,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498677589] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:14,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:14,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-02-18 20:09:14,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113210100] [2023-02-18 20:09:14,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 20:09:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 20:09:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=994, Unknown=1, NotChecked=0, Total=1122 [2023-02-18 20:09:14,547 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 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) [2023-02-18 20:09:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:15,131 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-02-18 20:09:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 20:09:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 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 31 [2023-02-18 20:09:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:15,132 INFO L225 Difference]: With dead ends: 66 [2023-02-18 20:09:15,132 INFO L226 Difference]: Without dead ends: 45 [2023-02-18 20:09:15,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1868, Unknown=1, NotChecked=0, Total=2256 [2023-02-18 20:09:15,133 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 194 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:15,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 275 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:09:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-18 20:09:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-02-18 20:09:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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) [2023-02-18 20:09:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-02-18 20:09:15,135 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2023-02-18 20:09:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:15,135 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-02-18 20:09:15,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 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) [2023-02-18 20:09:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-02-18 20:09:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 20:09:15,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:15,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:15,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:15,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:15,341 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash 374629827, now seen corresponding path program 4 times [2023-02-18 20:09:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:15,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102751453] [2023-02-18 20:09:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:15,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102751453] [2023-02-18 20:09:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102751453] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366215393] [2023-02-18 20:09:15,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 20:09:15,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:15,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:15,557 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) [2023-02-18 20:09:15,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 20:09:15,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 20:09:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 20:09:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:15,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:15,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:15,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366215393] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:15,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:15,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2023-02-18 20:09:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450643488] [2023-02-18 20:09:15,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:15,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 20:09:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 20:09:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-02-18 20:09:15,864 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 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) [2023-02-18 20:09:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:16,066 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-18 20:09:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 20:09:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 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 35 [2023-02-18 20:09:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:16,067 INFO L225 Difference]: With dead ends: 55 [2023-02-18 20:09:16,068 INFO L226 Difference]: Without dead ends: 55 [2023-02-18 20:09:16,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 20:09:16,068 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:16,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 178 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-18 20:09:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-02-18 20:09:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 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) [2023-02-18 20:09:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-02-18 20:09:16,070 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2023-02-18 20:09:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:16,070 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-02-18 20:09:16,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 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) [2023-02-18 20:09:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-02-18 20:09:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 20:09:16,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:16,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:16,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:16,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 20:09:16,273 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1667122081, now seen corresponding path program 5 times [2023-02-18 20:09:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:16,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837814534] [2023-02-18 20:09:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:16,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:16,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837814534] [2023-02-18 20:09:16,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837814534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830809805] [2023-02-18 20:09:16,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 20:09:16,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:16,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:16,529 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) [2023-02-18 20:09:16,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 20:09:16,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 20:09:16,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:16,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 20:09:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:16,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:09:16,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-02-18 20:09:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:16,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 16 [2023-02-18 20:09:16,846 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-02-18 20:09:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:16,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830809805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:16,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:16,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2023-02-18 20:09:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391885567] [2023-02-18 20:09:16,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:16,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 20:09:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 20:09:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-02-18 20:09:16,941 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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) [2023-02-18 20:09:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:17,256 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2023-02-18 20:09:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 20:09:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 [2023-02-18 20:09:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:17,257 INFO L225 Difference]: With dead ends: 90 [2023-02-18 20:09:17,257 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 20:09:17,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 20:09:17,258 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 136 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:17,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 247 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:09:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 20:09:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2023-02-18 20:09:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-02-18 20:09:17,265 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2023-02-18 20:09:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:17,265 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-02-18 20:09:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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) [2023-02-18 20:09:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-02-18 20:09:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 20:09:17,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:17,266 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:17,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 20:09:17,472 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 537281572, now seen corresponding path program 6 times [2023-02-18 20:09:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:17,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358278028] [2023-02-18 20:09:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:17,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:17,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358278028] [2023-02-18 20:09:17,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358278028] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:17,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148307271] [2023-02-18 20:09:17,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 20:09:17,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:17,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:17,691 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) [2023-02-18 20:09:17,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 20:09:17,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 20:09:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 20:09:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:17,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:17,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:18,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148307271] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:18,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:18,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-02-18 20:09:18,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415824430] [2023-02-18 20:09:18,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:18,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 20:09:18,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:18,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 20:09:18,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 20:09:18,118 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 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) [2023-02-18 20:09:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:18,281 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-02-18 20:09:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 20:09:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 20:09:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:18,282 INFO L225 Difference]: With dead ends: 66 [2023-02-18 20:09:18,282 INFO L226 Difference]: Without dead ends: 66 [2023-02-18 20:09:18,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1582, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 20:09:18,283 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 522 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:18,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 176 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-18 20:09:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-02-18 20:09:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 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) [2023-02-18 20:09:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-02-18 20:09:18,284 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2023-02-18 20:09:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:18,284 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-02-18 20:09:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 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) [2023-02-18 20:09:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-02-18 20:09:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 20:09:18,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:18,285 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:18,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:18,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:18,489 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash 967653856, now seen corresponding path program 7 times [2023-02-18 20:09:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:18,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394405940] [2023-02-18 20:09:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:18,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394405940] [2023-02-18 20:09:18,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394405940] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972505479] [2023-02-18 20:09:18,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 20:09:18,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:18,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:18,718 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) [2023-02-18 20:09:18,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 20:09:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 20:09:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:18,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:09:19,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:09:19,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2023-02-18 20:09:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:19,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:19,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 91 treesize of output 87 [2023-02-18 20:09:19,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:09:19,501 INFO L350 Elim1Store]: Elim1 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 137 treesize of output 142 [2023-02-18 20:09:19,507 INFO L350 Elim1Store]: Elim1 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 130 treesize of output 126 [2023-02-18 20:09:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:19,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972505479] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:19,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:19,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2023-02-18 20:09:19,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020643704] [2023-02-18 20:09:19,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:19,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 20:09:19,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 20:09:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 20:09:19,588 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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) [2023-02-18 20:09:22,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:25,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:27,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:29,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:32,710 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2023-02-18 20:09:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-18 20:09:32,711 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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 49 [2023-02-18 20:09:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:32,711 INFO L225 Difference]: With dead ends: 185 [2023-02-18 20:09:32,711 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 20:09:32,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1085, Invalid=6055, Unknown=0, NotChecked=0, Total=7140 [2023-02-18 20:09:32,714 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1256 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 56 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:32,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1256 Valid, 594 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 865 Invalid, 7 Unknown, 0 Unchecked, 10.6s Time] [2023-02-18 20:09:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 20:09:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 71. [2023-02-18 20:09:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 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) [2023-02-18 20:09:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2023-02-18 20:09:32,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 49 [2023-02-18 20:09:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:32,721 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2023-02-18 20:09:32,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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) [2023-02-18 20:09:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2023-02-18 20:09:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 20:09:32,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:32,725 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:32,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:32,929 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,SelfDestructingSolverStorable17 [2023-02-18 20:09:32,930 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash -36316953, now seen corresponding path program 8 times [2023-02-18 20:09:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:32,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091190600] [2023-02-18 20:09:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:32,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:33,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091190600] [2023-02-18 20:09:33,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091190600] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:33,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157640390] [2023-02-18 20:09:33,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:09:33,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:33,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:33,262 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) [2023-02-18 20:09:33,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 20:09:33,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:09:33,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-18 20:09:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:33,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:09:33,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:09:33,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2023-02-18 20:09:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:33,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:34,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 99 treesize of output 95 [2023-02-18 20:09:34,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:09:34,236 INFO L350 Elim1Store]: Elim1 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 153 treesize of output 158 [2023-02-18 20:09:34,238 INFO L350 Elim1Store]: Elim1 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 142 treesize of output 138 [2023-02-18 20:09:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:34,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157640390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:34,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:34,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2023-02-18 20:09:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930410400] [2023-02-18 20:09:34,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:34,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 20:09:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 20:09:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 20:09:34,329 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2023-02-18 20:09:36,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:40,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:43,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:49,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:09:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:50,623 INFO L93 Difference]: Finished difference Result 215 states and 239 transitions. [2023-02-18 20:09:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 20:09:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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 [2023-02-18 20:09:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:50,624 INFO L225 Difference]: With dead ends: 215 [2023-02-18 20:09:50,624 INFO L226 Difference]: Without dead ends: 144 [2023-02-18 20:09:50,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1276, Invalid=7464, Unknown=2, NotChecked=0, Total=8742 [2023-02-18 20:09:50,626 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1312 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 77 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:50,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 877 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1300 Invalid, 9 Unknown, 0 Unchecked, 13.0s Time] [2023-02-18 20:09:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-18 20:09:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 82. [2023-02-18 20:09:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 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) [2023-02-18 20:09:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-02-18 20:09:50,628 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 58 [2023-02-18 20:09:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:50,628 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-02-18 20:09:50,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2023-02-18 20:09:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-02-18 20:09:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 20:09:50,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:50,629 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:50,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:50,834 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash -94420198, now seen corresponding path program 9 times [2023-02-18 20:09:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:50,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640494264] [2023-02-18 20:09:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640494264] [2023-02-18 20:09:51,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640494264] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805675837] [2023-02-18 20:09:51,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:09:51,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:51,233 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) [2023-02-18 20:09:51,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 20:09:51,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 20:09:51,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 20:09:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:51,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:09:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:51,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 16 [2023-02-18 20:09:51,770 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-02-18 20:09:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:51,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805675837] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:51,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:51,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2023-02-18 20:09:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202684252] [2023-02-18 20:09:51,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 20:09:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 20:09:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 20:09:51,954 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 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) [2023-02-18 20:09:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:52,741 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2023-02-18 20:09:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 20:09:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 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 67 [2023-02-18 20:09:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:52,742 INFO L225 Difference]: With dead ends: 162 [2023-02-18 20:09:52,742 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 20:09:52,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 98 SyntacticMatches, 20 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=3067, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 20:09:52,744 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 439 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:52,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 725 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 20:09:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 20:09:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-02-18 20:09:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-02-18 20:09:52,752 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 67 [2023-02-18 20:09:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:52,752 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-02-18 20:09:52,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 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) [2023-02-18 20:09:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-02-18 20:09:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 20:09:52,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:52,753 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:52,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-18 20:09:52,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:52,958 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash -810678089, now seen corresponding path program 10 times [2023-02-18 20:09:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:52,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596706478] [2023-02-18 20:09:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:53,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596706478] [2023-02-18 20:09:53,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596706478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494885484] [2023-02-18 20:09:53,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 20:09:53,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:53,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:53,281 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) [2023-02-18 20:09:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 20:09:53,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 20:09:53,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:53,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-18 20:09:53,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:53,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:53,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:53,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494885484] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:53,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:53,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2023-02-18 20:09:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835051004] [2023-02-18 20:09:53,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 20:09:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 20:09:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1964, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 20:09:53,955 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 48 states, 47 states have (on average 3.74468085106383) internal successors, (176), 48 states have internal predecessors, (176), 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) [2023-02-18 20:09:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:54,360 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2023-02-18 20:09:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 20:09:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.74468085106383) internal successors, (176), 48 states have internal predecessors, (176), 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 71 [2023-02-18 20:09:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:54,361 INFO L225 Difference]: With dead ends: 99 [2023-02-18 20:09:54,361 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 20:09:54,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 20:09:54,362 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 560 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:54,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 473 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:09:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 20:09:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2023-02-18 20:09:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2023-02-18 20:09:54,364 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 71 [2023-02-18 20:09:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:54,364 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2023-02-18 20:09:54,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.74468085106383) internal successors, (176), 48 states have internal predecessors, (176), 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) [2023-02-18 20:09:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2023-02-18 20:09:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 20:09:54,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:54,365 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:54,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-18 20:09:54,570 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,SelfDestructingSolverStorable20 [2023-02-18 20:09:54,571 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1424467667, now seen corresponding path program 11 times [2023-02-18 20:09:54,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:54,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158950934] [2023-02-18 20:09:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:55,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158950934] [2023-02-18 20:09:55,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158950934] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117386214] [2023-02-18 20:09:55,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 20:09:55,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:55,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:55,020 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) [2023-02-18 20:09:55,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 20:09:55,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-18 20:09:55,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 20:09:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:55,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:09:55,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-02-18 20:09:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:55,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:55,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 16 [2023-02-18 20:09:55,600 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-02-18 20:09:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:55,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117386214] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:55,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:55,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2023-02-18 20:09:55,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789071229] [2023-02-18 20:09:55,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:55,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 20:09:55,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 20:09:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 20:09:55,789 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 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) [2023-02-18 20:09:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:56,730 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2023-02-18 20:09:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 20:09:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 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 76 [2023-02-18 20:09:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:56,733 INFO L225 Difference]: With dead ends: 186 [2023-02-18 20:09:56,733 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 20:09:56,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 22 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=3646, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 20:09:56,734 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 522 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:56,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 898 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 20:09:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 20:09:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2023-02-18 20:09:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 96 states have internal predecessors, (106), 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) [2023-02-18 20:09:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2023-02-18 20:09:56,735 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 76 [2023-02-18 20:09:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:56,735 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2023-02-18 20:09:56,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 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) [2023-02-18 20:09:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2023-02-18 20:09:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 20:09:56,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:56,736 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:56,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:56,940 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,SelfDestructingSolverStorable21 [2023-02-18 20:09:56,941 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:09:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1117885488, now seen corresponding path program 12 times [2023-02-18 20:09:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771714515] [2023-02-18 20:09:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:56,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:57,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771714515] [2023-02-18 20:09:57,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771714515] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409801894] [2023-02-18 20:09:57,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 20:09:57,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:57,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:57,371 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) [2023-02-18 20:09:57,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 20:09:57,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-18 20:09:57,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 20:09:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:57,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:10:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:10:10,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-18 20:10:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:10:10,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:10:11,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 59 [2023-02-18 20:10:11,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:10:11,442 INFO L350 Elim1Store]: Elim1 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 77 treesize of output 82 [2023-02-18 20:10:11,447 INFO L350 Elim1Store]: Elim1 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 86 treesize of output 82 [2023-02-18 20:10:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:10:11,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409801894] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:10:11,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:10:11,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 23] total 56 [2023-02-18 20:10:11,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405179656] [2023-02-18 20:10:11,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:10:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 20:10:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:10:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 20:10:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=2743, Unknown=4, NotChecked=0, Total=3192 [2023-02-18 20:10:11,620 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 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) [2023-02-18 20:10:14,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:16,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:10:20,396 INFO L93 Difference]: Finished difference Result 190 states and 213 transitions. [2023-02-18 20:10:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 20:10:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 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 80 [2023-02-18 20:10:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:10:20,398 INFO L225 Difference]: With dead ends: 190 [2023-02-18 20:10:20,398 INFO L226 Difference]: Without dead ends: 190 [2023-02-18 20:10:20,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1720, Invalid=6286, Unknown=4, NotChecked=0, Total=8010 [2023-02-18 20:10:20,400 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 947 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 52 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:10:20,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 583 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 888 Invalid, 8 Unknown, 0 Unchecked, 8.0s Time] [2023-02-18 20:10:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-18 20:10:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 111. [2023-02-18 20:10:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 110 states have internal predecessors, (122), 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) [2023-02-18 20:10:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2023-02-18 20:10:20,402 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 80 [2023-02-18 20:10:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:10:20,402 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2023-02-18 20:10:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 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) [2023-02-18 20:10:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2023-02-18 20:10:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 20:10:20,403 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:10:20,403 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:10:20,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 20:10:20,605 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,SelfDestructingSolverStorable22 [2023-02-18 20:10:20,605 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:10:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:10:20,605 INFO L85 PathProgramCache]: Analyzing trace with hash -615109968, now seen corresponding path program 13 times [2023-02-18 20:10:20,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:10:20,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262757111] [2023-02-18 20:10:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:10:20,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:10:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:10:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:10:21,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:10:21,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262757111] [2023-02-18 20:10:21,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262757111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:10:21,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063569174] [2023-02-18 20:10:21,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 20:10:21,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:10:21,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:10:21,303 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) [2023-02-18 20:10:21,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 20:10:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:10:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 20:10:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:10:21,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:10:22,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:10:22,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2023-02-18 20:10:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 75 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 20:10:22,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:10:22,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 30 treesize of output 28 [2023-02-18 20:10:22,904 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 52 [2023-02-18 20:10:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 75 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 20:10:23,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063569174] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:10:23,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:10:23,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 60 [2023-02-18 20:10:23,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832744660] [2023-02-18 20:10:23,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:10:23,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 20:10:23,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:10:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 20:10:23,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3390, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 20:10:23,259 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 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) [2023-02-18 20:10:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:10:26,246 INFO L93 Difference]: Finished difference Result 217 states and 241 transitions. [2023-02-18 20:10:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 20:10:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 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 90 [2023-02-18 20:10:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:10:26,247 INFO L225 Difference]: With dead ends: 217 [2023-02-18 20:10:26,247 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 20:10:26,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 136 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=646, Invalid=8666, Unknown=0, NotChecked=0, Total=9312 [2023-02-18 20:10:26,248 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 689 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:10:26,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1701 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2492 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 20:10:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 20:10:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2023-02-18 20:10:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 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) [2023-02-18 20:10:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2023-02-18 20:10:26,250 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 90 [2023-02-18 20:10:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:10:26,251 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2023-02-18 20:10:26,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 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) [2023-02-18 20:10:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2023-02-18 20:10:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-18 20:10:26,251 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:10:26,251 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:10:26,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 20:10:26,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:10:26,458 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:10:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:10:26,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1372691341, now seen corresponding path program 14 times [2023-02-18 20:10:26,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:10:26,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091287275] [2023-02-18 20:10:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:10:26,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:10:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:10:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:10:27,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:10:27,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091287275] [2023-02-18 20:10:27,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091287275] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:10:27,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441197317] [2023-02-18 20:10:27,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:10:27,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:10:27,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:10:27,013 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) [2023-02-18 20:10:27,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 20:10:27,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:10:27,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:10:27,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-18 20:10:27,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:10:27,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:10:27,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:10:27,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2023-02-18 20:10:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:10:28,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:10:28,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 131 treesize of output 127 [2023-02-18 20:10:28,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:10:28,858 INFO L350 Elim1Store]: Elim1 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 217 treesize of output 222 [2023-02-18 20:10:28,860 INFO L350 Elim1Store]: Elim1 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 190 treesize of output 186 [2023-02-18 20:10:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:10:29,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441197317] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:10:29,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:10:29,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2023-02-18 20:10:29,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709925806] [2023-02-18 20:10:29,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:10:29,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-18 20:10:29,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:10:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-18 20:10:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 20:10:29,079 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 66 states, 66 states have (on average 3.606060606060606) internal successors, (238), 66 states have internal predecessors, (238), 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) [2023-02-18 20:10:32,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:34,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:36,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:42,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:50,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:52,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:56,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:10:58,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:11:03,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:11:09,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 20:11:11,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-18 20:11:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:19,066 INFO L93 Difference]: Finished difference Result 420 states and 472 transitions. [2023-02-18 20:11:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-18 20:11:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.606060606060606) internal successors, (238), 66 states have internal predecessors, (238), 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 94 [2023-02-18 20:11:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:19,067 INFO L225 Difference]: With dead ends: 420 [2023-02-18 20:11:19,067 INFO L226 Difference]: Without dead ends: 271 [2023-02-18 20:11:19,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=3829, Invalid=21282, Unknown=11, NotChecked=0, Total=25122 [2023-02-18 20:11:19,069 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2315 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 3094 mSolverCounterSat, 178 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 2226 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 3094 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.8s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:19,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 2226 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 3094 Invalid, 22 Unknown, 0 Unchecked, 29.8s Time] [2023-02-18 20:11:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-18 20:11:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 126. [2023-02-18 20:11:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.104) internal successors, (138), 125 states have internal predecessors, (138), 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) [2023-02-18 20:11:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2023-02-18 20:11:19,071 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 94 [2023-02-18 20:11:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:19,071 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2023-02-18 20:11:19,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.606060606060606) internal successors, (238), 66 states have internal predecessors, (238), 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) [2023-02-18 20:11:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2023-02-18 20:11:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-18 20:11:19,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:11:19,072 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:19,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:19,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:19,277 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:11:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:11:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1263467378, now seen corresponding path program 15 times [2023-02-18 20:11:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:11:19,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630532363] [2023-02-18 20:11:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:11:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:11:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:19,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:11:19,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630532363] [2023-02-18 20:11:19,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630532363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:11:19,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465699629] [2023-02-18 20:11:19,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:11:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:11:19,890 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) [2023-02-18 20:11:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 20:11:20,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-18 20:11:20,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:11:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 20:11:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:11:20,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:11:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-02-18 20:11:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:11:20,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 16 [2023-02-18 20:11:20,815 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-02-18 20:11:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:21,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465699629] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:11:21,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:11:21,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2023-02-18 20:11:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120303936] [2023-02-18 20:11:21,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:11:21,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 20:11:21,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:11:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 20:11:21,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 20:11:21,100 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 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) [2023-02-18 20:11:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:22,560 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2023-02-18 20:11:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 20:11:22,560 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 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 103 [2023-02-18 20:11:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:22,561 INFO L225 Difference]: With dead ends: 258 [2023-02-18 20:11:22,561 INFO L226 Difference]: Without dead ends: 133 [2023-02-18 20:11:22,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 156 SyntacticMatches, 31 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 20:11:22,576 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 545 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:22,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1663 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 20:11:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-18 20:11:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2023-02-18 20:11:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 129 states have internal predecessors, (142), 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) [2023-02-18 20:11:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2023-02-18 20:11:22,582 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 103 [2023-02-18 20:11:22,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:22,582 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2023-02-18 20:11:22,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 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) [2023-02-18 20:11:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2023-02-18 20:11:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-18 20:11:22,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:11:22,583 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:22,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:22,788 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,SelfDestructingSolverStorable25 [2023-02-18 20:11:22,788 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:11:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:11:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1364328533, now seen corresponding path program 16 times [2023-02-18 20:11:22,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:11:22,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141107646] [2023-02-18 20:11:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:11:22,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:11:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 153 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:23,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:11:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141107646] [2023-02-18 20:11:23,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141107646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:11:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221543334] [2023-02-18 20:11:23,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 20:11:23,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:11:23,411 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) [2023-02-18 20:11:23,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 20:11:23,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 20:11:23,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:11:23,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-18 20:11:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:11:23,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:11:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:11:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:24,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221543334] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:11:24,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:11:24,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 67 [2023-02-18 20:11:24,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531320007] [2023-02-18 20:11:24,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:11:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 20:11:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:11:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 20:11:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=3966, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 20:11:24,688 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 68 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 68 states have internal predecessors, (264), 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) [2023-02-18 20:11:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:25,652 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2023-02-18 20:11:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 20:11:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 68 states have internal predecessors, (264), 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 107 [2023-02-18 20:11:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:25,653 INFO L225 Difference]: With dead ends: 143 [2023-02-18 20:11:25,653 INFO L226 Difference]: Without dead ends: 143 [2023-02-18 20:11:25,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 161 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1320, Invalid=5486, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 20:11:25,654 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 948 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:25,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 1059 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 20:11:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-18 20:11:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2023-02-18 20:11:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 136 states have internal predecessors, (150), 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) [2023-02-18 20:11:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2023-02-18 20:11:25,656 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 107 [2023-02-18 20:11:25,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:25,657 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2023-02-18 20:11:25,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 68 states have internal predecessors, (264), 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) [2023-02-18 20:11:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2023-02-18 20:11:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-18 20:11:25,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:11:25,657 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:25,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:25,861 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,SelfDestructingSolverStorable26 [2023-02-18 20:11:25,861 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:11:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:11:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1140811079, now seen corresponding path program 17 times [2023-02-18 20:11:25,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:11:25,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410674840] [2023-02-18 20:11:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:11:25,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:11:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:26,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:11:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410674840] [2023-02-18 20:11:26,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410674840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:11:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548264744] [2023-02-18 20:11:26,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 20:11:26,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:26,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:11:26,605 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) [2023-02-18 20:11:26,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 20:11:26,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-18 20:11:26,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:11:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-18 20:11:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:11:27,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:11:27,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-02-18 20:11:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:27,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:11:27,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 16 [2023-02-18 20:11:27,553 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-02-18 20:11:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:27,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548264744] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:11:27,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:11:27,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 50 [2023-02-18 20:11:27,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144448440] [2023-02-18 20:11:27,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:11:27,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 20:11:27,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:11:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 20:11:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 20:11:27,877 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 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) [2023-02-18 20:11:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:29,656 INFO L93 Difference]: Finished difference Result 282 states and 314 transitions. [2023-02-18 20:11:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 20:11:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 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) Word has length 112 [2023-02-18 20:11:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:29,657 INFO L225 Difference]: With dead ends: 282 [2023-02-18 20:11:29,657 INFO L226 Difference]: Without dead ends: 144 [2023-02-18 20:11:29,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 170 SyntacticMatches, 34 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=534, Invalid=7122, Unknown=0, NotChecked=0, Total=7656 [2023-02-18 20:11:29,658 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 761 mSDsluCounter, 2070 mSDsCounter, 0 mSdLazyCounter, 3066 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:29,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 2130 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3066 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 20:11:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-18 20:11:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2023-02-18 20:11:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1) internal successors, (154), 140 states have internal predecessors, (154), 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) [2023-02-18 20:11:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2023-02-18 20:11:29,660 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 112 [2023-02-18 20:11:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2023-02-18 20:11:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 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) [2023-02-18 20:11:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2023-02-18 20:11:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-18 20:11:29,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:11:29,661 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:29,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 20:11:29,867 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:11:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:11:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash -339750852, now seen corresponding path program 18 times [2023-02-18 20:11:29,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:11:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099018153] [2023-02-18 20:11:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:11:29,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:11:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 190 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:30,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:11:30,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099018153] [2023-02-18 20:11:30,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099018153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:11:30,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843342078] [2023-02-18 20:11:30,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 20:11:30,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:11:30,537 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:11:30,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 20:11:30,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 20:11:30,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:11:30,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-18 20:11:30,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:11:30,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:11:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:31,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:11:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:32,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843342078] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:11:32,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:11:32,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 84 [2023-02-18 20:11:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319089063] [2023-02-18 20:11:32,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:11:32,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-02-18 20:11:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:11:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-02-18 20:11:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=6124, Unknown=0, NotChecked=0, Total=7140 [2023-02-18 20:11:32,440 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 85 states, 84 states have (on average 4.071428571428571) internal successors, (342), 85 states have internal predecessors, (342), 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) [2023-02-18 20:11:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:33,208 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2023-02-18 20:11:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 20:11:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 4.071428571428571) internal successors, (342), 85 states have internal predecessors, (342), 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 116 [2023-02-18 20:11:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:33,210 INFO L225 Difference]: With dead ends: 154 [2023-02-18 20:11:33,210 INFO L226 Difference]: Without dead ends: 154 [2023-02-18 20:11:33,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1962, Invalid=8138, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 20:11:33,211 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1114 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:33,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 817 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 20:11:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-02-18 20:11:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2023-02-18 20:11:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 147 states have internal predecessors, (162), 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) [2023-02-18 20:11:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2023-02-18 20:11:33,213 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 116 [2023-02-18 20:11:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:33,213 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2023-02-18 20:11:33,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 4.071428571428571) internal successors, (342), 85 states have internal predecessors, (342), 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) [2023-02-18 20:11:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2023-02-18 20:11:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-18 20:11:33,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:11:33,214 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:33,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 20:11:33,420 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:11:33,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:11:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -385909560, now seen corresponding path program 19 times [2023-02-18 20:11:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:11:33,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936188952] [2023-02-18 20:11:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:11:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:11:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:34,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:11:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936188952] [2023-02-18 20:11:34,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936188952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:11:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082302216] [2023-02-18 20:11:34,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 20:11:34,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:34,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:11:34,154 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:11:34,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 20:11:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:34,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 20:11:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:11:34,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 20:11:34,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-02-18 20:11:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:34,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:11:35,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 16 [2023-02-18 20:11:35,194 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 28 [2023-02-18 20:11:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:35,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082302216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:11:35,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:11:35,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2023-02-18 20:11:35,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78415230] [2023-02-18 20:11:35,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:11:35,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 20:11:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:11:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 20:11:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 20:11:35,556 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 53 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 53 states have internal predecessors, (190), 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) [2023-02-18 20:11:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:37,511 INFO L93 Difference]: Finished difference Result 306 states and 341 transitions. [2023-02-18 20:11:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 20:11:37,512 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 53 states have internal predecessors, (190), 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 121 [2023-02-18 20:11:37,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:37,512 INFO L225 Difference]: With dead ends: 306 [2023-02-18 20:11:37,512 INFO L226 Difference]: Without dead ends: 155 [2023-02-18 20:11:37,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 184 SyntacticMatches, 37 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=571, Invalid=8171, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 20:11:37,513 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 736 mSDsluCounter, 2036 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:37,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 2101 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 20:11:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-18 20:11:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2023-02-18 20:11:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.099337748344371) internal successors, (166), 151 states have internal predecessors, (166), 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) [2023-02-18 20:11:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2023-02-18 20:11:37,521 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 121 [2023-02-18 20:11:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:37,521 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2023-02-18 20:11:37,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 53 states have internal predecessors, (190), 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) [2023-02-18 20:11:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2023-02-18 20:11:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-18 20:11:37,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:11:37,522 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:37,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:37,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:37,725 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:11:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:11:37,725 INFO L85 PathProgramCache]: Analyzing trace with hash 908118693, now seen corresponding path program 20 times [2023-02-18 20:11:37,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:11:37,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196927242] [2023-02-18 20:11:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:11:37,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:11:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 231 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:38,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:11:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196927242] [2023-02-18 20:11:38,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196927242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:11:38,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995528117] [2023-02-18 20:11:38,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:11:38,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:38,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:11:38,401 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:11:38,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 20:11:38,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:11:38,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:11:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 20:11:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:11:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:39,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:11:39,445 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 17 [2023-02-18 20:11:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:39,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995528117] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:11:39,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:11:39,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2023-02-18 20:11:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435838221] [2023-02-18 20:11:39,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:11:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 20:11:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:11:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 20:11:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=3541, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 20:11:39,712 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 64 states, 63 states have (on average 4.031746031746032) internal successors, (254), 64 states have internal predecessors, (254), 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) [2023-02-18 20:11:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:40,728 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2023-02-18 20:11:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 20:11:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.031746031746032) internal successors, (254), 64 states have internal predecessors, (254), 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 125 [2023-02-18 20:11:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:40,729 INFO L225 Difference]: With dead ends: 165 [2023-02-18 20:11:40,729 INFO L226 Difference]: Without dead ends: 165 [2023-02-18 20:11:40,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 189 SyntacticMatches, 27 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1200, Invalid=5280, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 20:11:40,730 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1518 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:40,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 1341 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 20:11:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-18 20:11:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-02-18 20:11:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1012658227848102) internal successors, (174), 158 states have internal predecessors, (174), 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) [2023-02-18 20:11:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 174 transitions. [2023-02-18 20:11:40,742 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 174 transitions. Word has length 125 [2023-02-18 20:11:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:40,742 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 174 transitions. [2023-02-18 20:11:40,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.031746031746032) internal successors, (254), 64 states have internal predecessors, (254), 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) [2023-02-18 20:11:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 174 transitions. [2023-02-18 20:11:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-18 20:11:40,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:11:40,742 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:40,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:40,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:40,943 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 20:11:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:11:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1767349247, now seen corresponding path program 21 times [2023-02-18 20:11:40,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:11:40,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039598156] [2023-02-18 20:11:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:11:40,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:11:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:11:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:11:41,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:11:41,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039598156] [2023-02-18 20:11:41,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039598156] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:11:41,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068523934] [2023-02-18 20:11:41,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:11:41,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:41,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:11:41,746 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:11:41,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 20:11:42,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 20:11:42,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:11:42,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 20:11:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:11:42,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:11:42,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-18 20:11:42,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:11:42,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-02-18 20:11:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 20:11:43,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:11:43,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-02-18 20:11:43,631 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2023-02-18 20:11:43,638 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 20:11:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 20:11:43,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068523934] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:11:43,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:11:43,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 9, 9] total 50 [2023-02-18 20:11:43,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756191622] [2023-02-18 20:11:43,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:11:43,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 20:11:43,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:11:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 20:11:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2331, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 20:11:43,782 INFO L87 Difference]: Start difference. First operand 159 states and 174 transitions. Second operand has 50 states, 50 states have (on average 3.4) internal successors, (170), 50 states have internal predecessors, (170), 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) [2023-02-18 20:11:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:11:50,531 INFO L93 Difference]: Finished difference Result 260 states and 288 transitions. [2023-02-18 20:11:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 20:11:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.4) internal successors, (170), 50 states have internal predecessors, (170), 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 130 [2023-02-18 20:11:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:11:50,531 INFO L225 Difference]: With dead ends: 260 [2023-02-18 20:11:50,531 INFO L226 Difference]: Without dead ends: 0 [2023-02-18 20:11:50,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 238 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1510, Invalid=11600, Unknown=0, NotChecked=0, Total=13110 [2023-02-18 20:11:50,532 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 490 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 3869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:11:50,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1840 Invalid, 3869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-18 20:11:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-18 20:11:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-18 20:11:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-02-18 20:11:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-18 20:11:50,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2023-02-18 20:11:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:11:50,533 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-18 20:11:50,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.4) internal successors, (170), 50 states have internal predecessors, (170), 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) [2023-02-18 20:11:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-18 20:11:50,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-18 20:11:50,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-02-18 20:11:50,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-02-18 20:11:50,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-02-18 20:11:50,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-02-18 20:11:50,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-02-18 20:11:50,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-02-18 20:11:50,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-02-18 20:11:50,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-02-18 20:11:50,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-02-18 20:11:50,537 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2023-02-18 20:11:50,537 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-02-18 20:11:50,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 20:11:50,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:11:50,743 INFO L445 BasicCegarLoop]: Path program histogram: [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:11:50,744 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 20:11:50,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 08:11:50 BoogieIcfgContainer [2023-02-18 20:11:50,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 20:11:50,746 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 20:11:50,746 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 20:11:50,746 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 20:11:50,747 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:09:04" (3/4) ... [2023-02-18 20:11:50,748 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-18 20:11:50,756 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-02-18 20:11:50,756 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-18 20:11:50,756 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-18 20:11:50,756 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-18 20:11:50,780 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 20:11:50,781 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 20:11:50,784 INFO L158 Benchmark]: Toolchain (without parser) took 167391.66ms. Allocated memory was 125.8MB in the beginning and 264.2MB in the end (delta: 138.4MB). Free memory was 88.3MB in the beginning and 183.4MB in the end (delta: -95.1MB). Peak memory consumption was 42.6MB. Max. memory is 16.1GB. [2023-02-18 20:11:50,784 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 98.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 20:11:50,785 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.75ms. Allocated memory is still 125.8MB. Free memory was 88.3MB in the beginning and 72.5MB in the end (delta: 15.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-02-18 20:11:50,786 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.79ms. Allocated memory is still 125.8MB. Free memory was 72.5MB in the beginning and 70.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 20:11:50,786 INFO L158 Benchmark]: Boogie Preprocessor took 21.52ms. Allocated memory is still 125.8MB. Free memory was 70.5MB in the beginning and 69.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 20:11:50,786 INFO L158 Benchmark]: RCFGBuilder took 321.94ms. Allocated memory is still 125.8MB. Free memory was 69.2MB in the beginning and 89.2MB in the end (delta: -20.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-18 20:11:50,786 INFO L158 Benchmark]: TraceAbstraction took 166681.98ms. Allocated memory was 125.8MB in the beginning and 264.2MB in the end (delta: 138.4MB). Free memory was 88.3MB in the beginning and 186.5MB in the end (delta: -98.2MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2023-02-18 20:11:50,787 INFO L158 Benchmark]: Witness Printer took 34.52ms. Allocated memory is still 264.2MB. Free memory was 186.5MB in the beginning and 183.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-18 20:11:50,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 98.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.75ms. Allocated memory is still 125.8MB. Free memory was 88.3MB in the beginning and 72.5MB in the end (delta: 15.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.79ms. Allocated memory is still 125.8MB. Free memory was 72.5MB in the beginning and 70.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.52ms. Allocated memory is still 125.8MB. Free memory was 70.5MB in the beginning and 69.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 321.94ms. Allocated memory is still 125.8MB. Free memory was 69.2MB in the beginning and 89.2MB in the end (delta: -20.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 166681.98ms. Allocated memory was 125.8MB in the beginning and 264.2MB in the end (delta: 138.4MB). Free memory was 88.3MB in the beginning and 186.5MB in the end (delta: -98.2MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. * Witness Printer took 34.52ms. Allocated memory is still 264.2MB. Free memory was 186.5MB in the beginning and 183.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 166.6s, OverallIterations: 32, TraceHistogramMax: 14, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 114.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 48 mSolverCounterUnknown, 16286 SdHoareTripleChecker+Valid, 76.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16286 mSDsluCounter, 20707 SdHoareTripleChecker+Invalid, 74.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19597 mSDsCounter, 661 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 31200 IncrementalHoareTripleChecker+Invalid, 31909 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 661 mSolverCounterUnsat, 1110 mSDtfsCounter, 31200 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4273 GetRequests, 2410 SyntacticMatches, 251 SemanticMatches, 1612 ConstructedPredicates, 0 IntricatePredicates, 22 DeprecatedPredicates, 30686 ImplicationChecksByTransitivity, 73.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=159occurred in iteration=31, InterpolantAutomatonStates: 858, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 32 MinimizatonAttempts, 568 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 43.7s InterpolantComputationTime, 3280 NumberOfCodeBlocks, 3280 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 4802 ConstructedInterpolants, 448 QuantifiedInterpolants, 76883 SizeOfPredicates, 282 NumberOfNonLiveVariables, 6508 ConjunctsInSsa, 1213 ConjunctsInUnsatCore, 76 InterpolantComputations, 10 PerfectInterpolantSequences, 5148/19217 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-02-18 20:11:50,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE