./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/list-simple/sll2c_insert_equal.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 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 03:26:25,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 03:26:25,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 03:26:25,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 03:26:25,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 03:26:25,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 03:26:25,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 03:26:25,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 03:26:25,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 03:26:25,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 03:26:25,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 03:26:25,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 03:26:25,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 03:26:25,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 03:26:25,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 03:26:25,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 03:26:25,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 03:26:25,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 03:26:26,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 03:26:26,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 03:26:26,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 03:26:26,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 03:26:26,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 03:26:26,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 03:26:26,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 03:26:26,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 03:26:26,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 03:26:26,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 03:26:26,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 03:26:26,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 03:26:26,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 03:26:26,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 03:26:26,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 03:26:26,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 03:26:26,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 03:26:26,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 03:26:26,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 03:26:26,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 03:26:26,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 03:26:26,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 03:26:26,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 03:26:26,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 03:26:26,060 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 03:26:26,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 03:26:26,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 03:26:26,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 03:26:26,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 03:26:26,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 03:26:26,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 03:26:26,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 03:26:26,063 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 03:26:26,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 03:26:26,064 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 03:26:26,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 03:26:26,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 03:26:26,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 03:26:26,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 03:26:26,064 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 03:26:26,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 03:26:26,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 03:26:26,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 03:26:26,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 03:26:26,065 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 03:26:26,065 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 03:26:26,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 03:26:26,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 03:26:26,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 03:26:26,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:26:26,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 03:26:26,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 03:26:26,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 03:26:26,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 03:26:26,067 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 03:26:26,068 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 03:26:26,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 03:26:26,068 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 03:26:26,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb [2023-02-17 03:26:26,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 03:26:26,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 03:26:26,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 03:26:26,346 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 03:26:26,348 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 03:26:26,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-02-17 03:26:27,499 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 03:26:27,724 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 03:26:27,724 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-02-17 03:26:27,746 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37e358060/109a193bc0f84820b1a51873ccd82843/FLAG8906549c4 [2023-02-17 03:26:27,759 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37e358060/109a193bc0f84820b1a51873ccd82843 [2023-02-17 03:26:27,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 03:26:27,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 03:26:27,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 03:26:27,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 03:26:27,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 03:26:27,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:26:27" (1/1) ... [2023-02-17 03:26:27,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29fdcfc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:27, skipping insertion in model container [2023-02-17 03:26:27,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:26:27" (1/1) ... [2023-02-17 03:26:27,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 03:26:27,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 03:26:28,134 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2023-02-17 03:26:28,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:26:28,147 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 03:26:28,182 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2023-02-17 03:26:28,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:26:28,215 INFO L208 MainTranslator]: Completed translation [2023-02-17 03:26:28,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28 WrapperNode [2023-02-17 03:26:28,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 03:26:28,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 03:26:28,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 03:26:28,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 03:26:28,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,281 INFO L138 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 147 [2023-02-17 03:26:28,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 03:26:28,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 03:26:28,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 03:26:28,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 03:26:28,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,321 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 03:26:28,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 03:26:28,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 03:26:28,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 03:26:28,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (1/1) ... [2023-02-17 03:26:28,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:26:28,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:26:28,366 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) [2023-02-17 03:26:28,368 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 [2023-02-17 03:26:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 03:26:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 03:26:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-17 03:26:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-17 03:26:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 03:26:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 03:26:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 03:26:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 03:26:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 03:26:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 03:26:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 03:26:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 03:26:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 03:26:28,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 03:26:28,551 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 03:26:28,566 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 03:26:28,934 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 03:26:28,940 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 03:26:28,940 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 03:26:28,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:26:28 BoogieIcfgContainer [2023-02-17 03:26:28,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 03:26:28,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 03:26:28,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 03:26:28,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 03:26:28,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 03:26:27" (1/3) ... [2023-02-17 03:26:28,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35aa0ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:26:28, skipping insertion in model container [2023-02-17 03:26:28,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:26:28" (2/3) ... [2023-02-17 03:26:28,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35aa0ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:26:28, skipping insertion in model container [2023-02-17 03:26:28,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:26:28" (3/3) ... [2023-02-17 03:26:28,950 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_insert_equal.i [2023-02-17 03:26:28,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 03:26:28,964 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-02-17 03:26:28,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 03:26:29,003 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;@491a196, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 03:26:29,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-02-17 03:26:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 64 states have (on average 2.03125) internal successors, (130), 116 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 03:26:29,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:29,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 03:26:29,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:29,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash 895367701, now seen corresponding path program 1 times [2023-02-17 03:26:29,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:29,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059084389] [2023-02-17 03:26:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:29,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:26:29,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:29,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059084389] [2023-02-17 03:26:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059084389] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:26:29,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:26:29,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:26:29,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603297897] [2023-02-17 03:26:29,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:26:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:26:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:26:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:26:29,308 INFO L87 Difference]: Start difference. First operand has 121 states, 64 states have (on average 2.03125) internal successors, (130), 116 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:26:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:29,431 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2023-02-17 03:26:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:26:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 03:26:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:29,449 INFO L225 Difference]: With dead ends: 119 [2023-02-17 03:26:29,451 INFO L226 Difference]: Without dead ends: 116 [2023-02-17 03:26:29,453 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 [2023-02-17 03:26:29,456 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:29,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 189 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:26:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-17 03:26:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-02-17 03:26:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2023-02-17 03:26:29,490 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 6 [2023-02-17 03:26:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:29,490 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2023-02-17 03:26:29,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:26:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2023-02-17 03:26:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 03:26:29,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:29,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 03:26:29,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 03:26:29,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 895367702, now seen corresponding path program 1 times [2023-02-17 03:26:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958209641] [2023-02-17 03:26:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:29,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:26:29,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:29,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958209641] [2023-02-17 03:26:29,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958209641] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:26:29,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:26:29,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:26:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353555643] [2023-02-17 03:26:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:26:29,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:26:29,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:29,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:26:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:26:29,610 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:26:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:29,717 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2023-02-17 03:26:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:26:29,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 03:26:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:29,723 INFO L225 Difference]: With dead ends: 114 [2023-02-17 03:26:29,724 INFO L226 Difference]: Without dead ends: 114 [2023-02-17 03:26:29,728 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 [2023-02-17 03:26:29,730 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:29,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 191 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:26:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-17 03:26:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-02-17 03:26:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2023-02-17 03:26:29,749 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 6 [2023-02-17 03:26:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:29,749 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2023-02-17 03:26:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:26:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2023-02-17 03:26:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 03:26:29,752 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:29,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:29,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 03:26:29,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1575141079, now seen corresponding path program 1 times [2023-02-17 03:26:29,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:29,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4696239] [2023-02-17 03:26:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:29,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:29,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:26:29,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4696239] [2023-02-17 03:26:29,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4696239] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:26:29,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:26:29,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:26:29,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515749045] [2023-02-17 03:26:29,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:26:29,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:26:29,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:26:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:26:29,837 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:26:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:29,929 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2023-02-17 03:26:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:26:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-17 03:26:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:29,931 INFO L225 Difference]: With dead ends: 121 [2023-02-17 03:26:29,931 INFO L226 Difference]: Without dead ends: 121 [2023-02-17 03:26:29,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:26:29,932 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 5 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:29,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 284 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:26:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-17 03:26:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2023-02-17 03:26:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 63 states have (on average 1.873015873015873) internal successors, (118), 110 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2023-02-17 03:26:29,941 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 13 [2023-02-17 03:26:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:29,942 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2023-02-17 03:26:29,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:26:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2023-02-17 03:26:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 03:26:29,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:29,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:29,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 03:26:29,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1331086820, now seen corresponding path program 1 times [2023-02-17 03:26:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693266453] [2023-02-17 03:26:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:29,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:30,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:30,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 03:26:30,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:30,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693266453] [2023-02-17 03:26:30,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693266453] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:26:30,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:26:30,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 03:26:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655864793] [2023-02-17 03:26:30,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:26:30,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:26:30,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:26:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:26:30,142 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:26:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:30,368 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2023-02-17 03:26:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:26:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-17 03:26:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:30,370 INFO L225 Difference]: With dead ends: 115 [2023-02-17 03:26:30,371 INFO L226 Difference]: Without dead ends: 115 [2023-02-17 03:26:30,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:26:30,375 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 13 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:30,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 405 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:26:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-17 03:26:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2023-02-17 03:26:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2023-02-17 03:26:30,381 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 22 [2023-02-17 03:26:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:30,381 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2023-02-17 03:26:30,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:26:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2023-02-17 03:26:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 03:26:30,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:30,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:30,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 03:26:30,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1331086819, now seen corresponding path program 1 times [2023-02-17 03:26:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764756062] [2023-02-17 03:26:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:30,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:30,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:26:30,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:30,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764756062] [2023-02-17 03:26:30,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764756062] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:26:30,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:26:30,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 03:26:30,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902022731] [2023-02-17 03:26:30,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:26:30,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:26:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:26:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:26:30,609 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:26:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:30,839 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2023-02-17 03:26:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:26:30,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-17 03:26:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:30,840 INFO L225 Difference]: With dead ends: 114 [2023-02-17 03:26:30,840 INFO L226 Difference]: Without dead ends: 114 [2023-02-17 03:26:30,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:26:30,841 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 11 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:30,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 429 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:26:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-17 03:26:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2023-02-17 03:26:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 108 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2023-02-17 03:26:30,848 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 22 [2023-02-17 03:26:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:30,848 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2023-02-17 03:26:30,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:26:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2023-02-17 03:26:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 03:26:30,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:30,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 03:26:30,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1025578181, now seen corresponding path program 1 times [2023-02-17 03:26:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:30,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082631349] [2023-02-17 03:26:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:31,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:31,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:26:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082631349] [2023-02-17 03:26:31,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082631349] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411484814] [2023-02-17 03:26:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:31,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:31,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:26:31,149 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) [2023-02-17 03:26:31,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 03:26:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 03:26:31,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:26:31,328 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 [2023-02-17 03:26:31,363 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_256 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_256))) is different from true [2023-02-17 03:26:31,370 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_256 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_256))) is different from true [2023-02-17 03:26:31,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:31,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 03:26:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-17 03:26:31,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:26:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:26:31,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411484814] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:26:31,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:26:31,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2023-02-17 03:26:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55928267] [2023-02-17 03:26:31,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:26:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 03:26:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 03:26:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=219, Unknown=2, NotChecked=62, Total=342 [2023-02-17 03:26:31,579 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 03:26:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:31,825 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2023-02-17 03:26:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:26:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-02-17 03:26:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:31,827 INFO L225 Difference]: With dead ends: 130 [2023-02-17 03:26:31,827 INFO L226 Difference]: Without dead ends: 130 [2023-02-17 03:26:31,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=271, Unknown=2, NotChecked=70, Total=420 [2023-02-17 03:26:31,828 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 196 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:31,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 416 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 388 Invalid, 0 Unknown, 272 Unchecked, 0.2s Time] [2023-02-17 03:26:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-17 03:26:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 112. [2023-02-17 03:26:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.8253968253968254) internal successors, (115), 107 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2023-02-17 03:26:31,832 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 25 [2023-02-17 03:26:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:31,833 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2023-02-17 03:26:31,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 03:26:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2023-02-17 03:26:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 03:26:31,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:31,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:31,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 03:26:32,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 03:26:32,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1025578182, now seen corresponding path program 1 times [2023-02-17 03:26:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:32,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21960534] [2023-02-17 03:26:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:32,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:26:32,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21960534] [2023-02-17 03:26:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21960534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567890322] [2023-02-17 03:26:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:32,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:32,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:26:32,356 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) [2023-02-17 03:26:32,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 03:26:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:32,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 03:26:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:26:32,464 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 [2023-02-17 03:26:32,543 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_362 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_362))))) is different from true [2023-02-17 03:26:32,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:32,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 03:26:32,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:32,566 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 11 treesize of output 15 [2023-02-17 03:26:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-17 03:26:32,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:26:32,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567890322] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:32,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:26:32,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2023-02-17 03:26:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943601471] [2023-02-17 03:26:32,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 03:26:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 03:26:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 03:26:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=358, Unknown=1, NotChecked=38, Total=462 [2023-02-17 03:26:32,637 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 03:26:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:33,145 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2023-02-17 03:26:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 03:26:33,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-02-17 03:26:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:33,147 INFO L225 Difference]: With dead ends: 112 [2023-02-17 03:26:33,147 INFO L226 Difference]: Without dead ends: 112 [2023-02-17 03:26:33,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=423, Unknown=1, NotChecked=42, Total=552 [2023-02-17 03:26:33,148 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 117 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:33,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 625 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 788 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2023-02-17 03:26:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-17 03:26:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-02-17 03:26:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.8095238095238095) internal successors, (114), 106 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2023-02-17 03:26:33,153 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 25 [2023-02-17 03:26:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:33,153 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2023-02-17 03:26:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 03:26:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2023-02-17 03:26:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 03:26:33,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:33,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:33,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 03:26:33,360 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,SelfDestructingSolverStorable6 [2023-02-17 03:26:33,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash 131514271, now seen corresponding path program 1 times [2023-02-17 03:26:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:33,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545139697] [2023-02-17 03:26:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:33,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:33,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:33,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:33,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 03:26:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:26:33,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:33,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545139697] [2023-02-17 03:26:33,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545139697] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:33,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135420576] [2023-02-17 03:26:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:33,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:33,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:26:33,771 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) [2023-02-17 03:26:33,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 03:26:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 03:26:33,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:26:33,904 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 [2023-02-17 03:26:33,911 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 5 treesize of output 3 [2023-02-17 03:26:33,922 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_521 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_521))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-17 03:26:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:33,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:26:33,944 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 5 treesize of output 3 [2023-02-17 03:26:33,955 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_522 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_522))))) is different from true [2023-02-17 03:26:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:33,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:26:33,976 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-02-17 03:26:33,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:33,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 03:26:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 18 not checked. [2023-02-17 03:26:33,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:26:34,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135420576] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:34,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:26:34,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2023-02-17 03:26:34,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386241071] [2023-02-17 03:26:34,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 03:26:34,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 03:26:34,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 03:26:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=122, Unknown=3, NotChecked=72, Total=240 [2023-02-17 03:26:34,051 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 03:26:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:34,334 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2023-02-17 03:26:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:26:34,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2023-02-17 03:26:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:34,335 INFO L225 Difference]: With dead ends: 121 [2023-02-17 03:26:34,335 INFO L226 Difference]: Without dead ends: 121 [2023-02-17 03:26:34,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=163, Unknown=3, NotChecked=84, Total=306 [2023-02-17 03:26:34,336 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 178 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:34,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 280 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 358 Invalid, 0 Unknown, 372 Unchecked, 0.3s Time] [2023-02-17 03:26:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-17 03:26:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2023-02-17 03:26:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 98 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2023-02-17 03:26:34,341 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 37 [2023-02-17 03:26:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:34,341 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2023-02-17 03:26:34,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 03:26:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2023-02-17 03:26:34,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 03:26:34,342 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:34,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:34,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 03:26:34,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:34,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:34,549 INFO L85 PathProgramCache]: Analyzing trace with hash 131514272, now seen corresponding path program 1 times [2023-02-17 03:26:34,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:34,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68059634] [2023-02-17 03:26:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:34,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:34,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:34,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 03:26:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:26:34,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:34,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68059634] [2023-02-17 03:26:34,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68059634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:34,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283809631] [2023-02-17 03:26:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:34,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:34,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:26:34,993 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) [2023-02-17 03:26:35,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 03:26:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 03:26:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:26:35,140 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 [2023-02-17 03:26:35,155 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 5 treesize of output 3 [2023-02-17 03:26:35,166 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_683 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_683) |c_#length|)))) is different from true [2023-02-17 03:26:35,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:35,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:26:35,209 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 5 treesize of output 3 [2023-02-17 03:26:35,214 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_684 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_684) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-17 03:26:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:35,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:26:35,248 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 5 treesize of output 3 [2023-02-17 03:26:35,251 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_685 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_685))))) is different from true [2023-02-17 03:26:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:35,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:26:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 18 not checked. [2023-02-17 03:26:35,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:26:35,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283809631] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:35,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:26:35,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-02-17 03:26:35,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101135562] [2023-02-17 03:26:35,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 03:26:35,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 03:26:35,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 03:26:35,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=225, Unknown=3, NotChecked=96, Total=380 [2023-02-17 03:26:35,314 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 18 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 03:26:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:35,605 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2023-02-17 03:26:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 03:26:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2023-02-17 03:26:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:35,606 INFO L225 Difference]: With dead ends: 113 [2023-02-17 03:26:35,606 INFO L226 Difference]: Without dead ends: 113 [2023-02-17 03:26:35,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=336, Unknown=3, NotChecked=120, Total=552 [2023-02-17 03:26:35,607 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 360 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:35,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 231 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 309 Invalid, 0 Unknown, 291 Unchecked, 0.2s Time] [2023-02-17 03:26:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-17 03:26:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2023-02-17 03:26:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 90 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2023-02-17 03:26:35,610 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 37 [2023-02-17 03:26:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:35,610 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2023-02-17 03:26:35,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 03:26:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2023-02-17 03:26:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 03:26:35,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:35,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:35,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 03:26:35,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:35,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash 931477670, now seen corresponding path program 1 times [2023-02-17 03:26:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:35,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621254186] [2023-02-17 03:26:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:35,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:36,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:36,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 03:26:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:26:36,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621254186] [2023-02-17 03:26:36,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621254186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48511058] [2023-02-17 03:26:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:36,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:26:36,271 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) [2023-02-17 03:26:36,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 03:26:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 03:26:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:26:36,439 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 [2023-02-17 03:26:36,546 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 9 treesize of output 5 [2023-02-17 03:26:36,604 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_846 (Array Int Int))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_846)) (<= |node_create_~temp~0#1.base| (+ (- 1) |c_#StackHeapBarrier|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-17 03:26:36,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:36,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 03:26:36,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:36,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 56 [2023-02-17 03:26:36,641 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 17 treesize of output 9 [2023-02-17 03:26:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-17 03:26:36,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:26:36,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48511058] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:36,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:26:36,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2023-02-17 03:26:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256243092] [2023-02-17 03:26:36,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 03:26:36,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 03:26:36,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:26:36,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 03:26:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=572, Unknown=1, NotChecked=48, Total=702 [2023-02-17 03:26:36,678 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 26 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 03:26:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:26:37,272 INFO L93 Difference]: Finished difference Result 186 states and 204 transitions. [2023-02-17 03:26:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 03:26:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-02-17 03:26:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:26:37,274 INFO L225 Difference]: With dead ends: 186 [2023-02-17 03:26:37,274 INFO L226 Difference]: Without dead ends: 186 [2023-02-17 03:26:37,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1064, Unknown=1, NotChecked=68, Total=1332 [2023-02-17 03:26:37,275 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 779 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:26:37,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 501 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 735 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2023-02-17 03:26:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-17 03:26:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 97. [2023-02-17 03:26:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 92 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:26:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-02-17 03:26:37,279 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 40 [2023-02-17 03:26:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:26:37,279 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-02-17 03:26:37,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 03:26:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-02-17 03:26:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 03:26:37,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:26:37,280 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:26:37,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 03:26:37,486 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,SelfDestructingSolverStorable9 [2023-02-17 03:26:37,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-17 03:26:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:26:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash 931477671, now seen corresponding path program 1 times [2023-02-17 03:26:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:26:37,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155868092] [2023-02-17 03:26:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:26:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:37,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:26:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:37,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:26:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:38,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 03:26:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 03:26:38,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:26:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155868092] [2023-02-17 03:26:38,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155868092] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:26:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027434490] [2023-02-17 03:26:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:26:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:26:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:26:38,205 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) [2023-02-17 03:26:38,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 03:26:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:26:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-17 03:26:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:26:38,370 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 [2023-02-17 03:26:38,402 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1009 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_1009))) is different from true [2023-02-17 03:26:38,405 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1009 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_1009))) is different from true [2023-02-17 03:26:38,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:38,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 03:26:38,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:38,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 59 [2023-02-17 03:26:39,098 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1015 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1015) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1014 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1014) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_1011 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1011))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-17 03:26:39,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:39,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-17 03:26:39,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:39,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 221 [2023-02-17 03:26:39,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:26:39,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 189 treesize of output 605 [2023-02-17 03:26:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:26:39,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27