./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/heap-manipulation/dancing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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/heap-manipulation/dancing.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 c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:31:15,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:31:15,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:31:15,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:31:15,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:31:15,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:31:15,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:31:15,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:31:15,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:31:15,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:31:15,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:31:15,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:31:15,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:31:15,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:31:15,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:31:15,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:31:15,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:31:15,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:31:15,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:31:15,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:31:15,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:31:15,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:31:15,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:31:15,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:31:15,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:31:15,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:31:15,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:31:15,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:31:15,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:31:15,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:31:15,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:31:15,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:31:15,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:31:15,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:31:15,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:31:15,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:31:15,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:31:15,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:31:15,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:31:15,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:31:15,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:31:15,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:31:15,953 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:31:15,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:31:15,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:31:15,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:31:15,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:31:15,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:31:15,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:31:15,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:31:15,957 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:31:15,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:31:15,958 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:31:15,958 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:31:15,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:31:15,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:31:15,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:31:15,959 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:31:15,959 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:31:15,959 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:31:15,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:31:15,959 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:31:15,959 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:31:15,960 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:31:15,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:31:15,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:31:15,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:31:15,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:31:15,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:31:15,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:31:15,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:31:15,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:31:15,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:31:15,961 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:31:15,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:31:15,962 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:31:15,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2023-02-16 03:31:16,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:31:16,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:31:16,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:31:16,290 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:31:16,290 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:31:16,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/dancing.i [2023-02-16 03:31:17,482 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:31:17,691 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:31:17,691 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/dancing.i [2023-02-16 03:31:17,701 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdfb7955/783c4b8f4f494f7581002917640d1ea2/FLAG0892b8656 [2023-02-16 03:31:17,713 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdfb7955/783c4b8f4f494f7581002917640d1ea2 [2023-02-16 03:31:17,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:31:17,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:31:17,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:31:17,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:31:17,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:31:17,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:31:17" (1/1) ... [2023-02-16 03:31:17,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f32078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:17, skipping insertion in model container [2023-02-16 03:31:17,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:31:17" (1/1) ... [2023-02-16 03:31:17,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:31:17,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:31:17,904 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/heap-manipulation/dancing.i[938,951] [2023-02-16 03:31:18,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:31:18,060 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:31:18,072 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/heap-manipulation/dancing.i[938,951] [2023-02-16 03:31:18,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:31:18,133 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:31:18,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18 WrapperNode [2023-02-16 03:31:18,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:31:18,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:31:18,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:31:18,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:31:18,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,202 INFO L138 Inliner]: procedures = 124, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2023-02-16 03:31:18,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:31:18,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:31:18,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:31:18,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:31:18,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,250 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:31:18,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:31:18,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:31:18,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:31:18,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:31:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:18,294 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) [2023-02-16 03:31:18,296 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 [2023-02-16 03:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2023-02-16 03:31:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2023-02-16 03:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 03:31:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 03:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 03:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:31:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:31:18,551 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:31:18,552 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:31:18,903 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:31:18,917 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:31:18,917 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-16 03:31:18,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:31:18 BoogieIcfgContainer [2023-02-16 03:31:18,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:31:18,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:31:18,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:31:18,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:31:18,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:31:17" (1/3) ... [2023-02-16 03:31:18,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f375b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:31:18, skipping insertion in model container [2023-02-16 03:31:18,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18" (2/3) ... [2023-02-16 03:31:18,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f375b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:31:18, skipping insertion in model container [2023-02-16 03:31:18,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:31:18" (3/3) ... [2023-02-16 03:31:18,927 INFO L112 eAbstractionObserver]: Analyzing ICFG dancing.i [2023-02-16 03:31:18,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:31:18,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-02-16 03:31:18,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:31:18,980 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;@23e8e5a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:31:18,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2023-02-16 03:31:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-16 03:31:18,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:18,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-16 03:31:18,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-16 03:31:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:19,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828586815] [2023-02-16 03:31:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:19,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:19,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828586815] [2023-02-16 03:31:19,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828586815] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:19,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:19,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:31:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714735795] [2023-02-16 03:31:19,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:19,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:31:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:31:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:31:19,211 INFO L87 Difference]: Start difference. First operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:19,327 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2023-02-16 03:31:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:31:19,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-16 03:31:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:19,337 INFO L225 Difference]: With dead ends: 106 [2023-02-16 03:31:19,338 INFO L226 Difference]: Without dead ends: 104 [2023-02-16 03:31:19,339 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 [2023-02-16 03:31:19,345 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:19,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-16 03:31:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-02-16 03:31:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 95 states have internal predecessors, (105), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2023-02-16 03:31:19,379 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 3 [2023-02-16 03:31:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:19,379 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2023-02-16 03:31:19,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2023-02-16 03:31:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-16 03:31:19,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:19,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-16 03:31:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:31:19,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-16 03:31:19,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:19,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387095853] [2023-02-16 03:31:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:19,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387095853] [2023-02-16 03:31:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387095853] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:19,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:19,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:31:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087462964] [2023-02-16 03:31:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:19,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:31:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:31:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:31:19,475 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:19,570 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2023-02-16 03:31:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:31:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-16 03:31:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:19,573 INFO L225 Difference]: With dead ends: 102 [2023-02-16 03:31:19,573 INFO L226 Difference]: Without dead ends: 102 [2023-02-16 03:31:19,573 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 [2023-02-16 03:31:19,574 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 80 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:19,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 92 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-16 03:31:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-02-16 03:31:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 93 states have internal predecessors, (103), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2023-02-16 03:31:19,588 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 3 [2023-02-16 03:31:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:19,591 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2023-02-16 03:31:19,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2023-02-16 03:31:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:31:19,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:19,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:19,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:31:19,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash 59267633, now seen corresponding path program 1 times [2023-02-16 03:31:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:19,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345025279] [2023-02-16 03:31:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:19,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:19,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345025279] [2023-02-16 03:31:19,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345025279] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:19,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:19,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:31:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597971188] [2023-02-16 03:31:19,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:19,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:31:19,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:19,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:31:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:31:19,677 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:19,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:19,787 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2023-02-16 03:31:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:31:19,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 03:31:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:19,789 INFO L225 Difference]: With dead ends: 165 [2023-02-16 03:31:19,789 INFO L226 Difference]: Without dead ends: 165 [2023-02-16 03:31:19,789 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 [2023-02-16 03:31:19,790 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 74 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:19,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 213 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-16 03:31:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 100. [2023-02-16 03:31:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 91 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2023-02-16 03:31:19,803 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 8 [2023-02-16 03:31:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:19,803 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2023-02-16 03:31:19,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2023-02-16 03:31:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:31:19,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:19,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:19,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:31:19,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash 59267634, now seen corresponding path program 1 times [2023-02-16 03:31:19,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:19,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051432651] [2023-02-16 03:31:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:19,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051432651] [2023-02-16 03:31:19,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051432651] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:19,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:19,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:31:19,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599820635] [2023-02-16 03:31:19,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:19,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:31:19,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:31:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:31:19,981 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:20,101 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2023-02-16 03:31:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:31:20,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 03:31:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:20,104 INFO L225 Difference]: With dead ends: 165 [2023-02-16 03:31:20,107 INFO L226 Difference]: Without dead ends: 165 [2023-02-16 03:31:20,107 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 [2023-02-16 03:31:20,108 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 74 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:20,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 217 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-16 03:31:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 98. [2023-02-16 03:31:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2023-02-16 03:31:20,130 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 8 [2023-02-16 03:31:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:20,131 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2023-02-16 03:31:20,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2023-02-16 03:31:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:31:20,132 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:20,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:31:20,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1124238034, now seen corresponding path program 1 times [2023-02-16 03:31:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:20,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890674039] [2023-02-16 03:31:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:20,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:20,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890674039] [2023-02-16 03:31:20,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890674039] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:20,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:20,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:20,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922429398] [2023-02-16 03:31:20,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:20,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:20,321 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-02-16 03:31:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:20,390 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2023-02-16 03:31:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2023-02-16 03:31:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:20,393 INFO L225 Difference]: With dead ends: 176 [2023-02-16 03:31:20,394 INFO L226 Difference]: Without dead ends: 176 [2023-02-16 03:31:20,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:20,395 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 78 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:20,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 403 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:31:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-16 03:31:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 142. [2023-02-16 03:31:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 93 states have (on average 1.89247311827957) internal successors, (176), 129 states have internal predecessors, (176), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2023-02-16 03:31:20,427 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 10 [2023-02-16 03:31:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:20,428 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2023-02-16 03:31:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-02-16 03:31:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2023-02-16 03:31:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:31:20,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:20,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:20,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:31:20,430 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1121620373, now seen corresponding path program 1 times [2023-02-16 03:31:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:20,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302014394] [2023-02-16 03:31:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:20,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302014394] [2023-02-16 03:31:20,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302014394] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:20,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:20,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:20,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961135285] [2023-02-16 03:31:20,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:20,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:31:20,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:20,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:31:20,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:20,642 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:20,766 INFO L93 Difference]: Finished difference Result 140 states and 192 transitions. [2023-02-16 03:31:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:31:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:20,768 INFO L225 Difference]: With dead ends: 140 [2023-02-16 03:31:20,768 INFO L226 Difference]: Without dead ends: 140 [2023-02-16 03:31:20,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:20,772 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 217 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:20,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 105 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-16 03:31:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-02-16 03:31:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 93 states have (on average 1.8494623655913978) internal successors, (172), 127 states have internal predecessors, (172), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 192 transitions. [2023-02-16 03:31:20,795 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 192 transitions. Word has length 10 [2023-02-16 03:31:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:20,795 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 192 transitions. [2023-02-16 03:31:20,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 192 transitions. [2023-02-16 03:31:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:31:20,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:20,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:31:20,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1910990355, now seen corresponding path program 1 times [2023-02-16 03:31:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:20,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997765584] [2023-02-16 03:31:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:31:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:20,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:20,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997765584] [2023-02-16 03:31:20,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997765584] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:20,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:20,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:20,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366788042] [2023-02-16 03:31:20,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:20,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:31:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:31:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:20,913 INFO L87 Difference]: Start difference. First operand 140 states and 192 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2023-02-16 03:31:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:21,109 INFO L93 Difference]: Finished difference Result 159 states and 184 transitions. [2023-02-16 03:31:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 15 [2023-02-16 03:31:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:21,111 INFO L225 Difference]: With dead ends: 159 [2023-02-16 03:31:21,112 INFO L226 Difference]: Without dead ends: 159 [2023-02-16 03:31:21,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:31:21,118 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 235 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:21,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 203 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-16 03:31:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2023-02-16 03:31:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.7311827956989247) internal successors, (161), 122 states have internal predecessors, (161), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 181 transitions. [2023-02-16 03:31:21,134 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 181 transitions. Word has length 15 [2023-02-16 03:31:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:21,135 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 181 transitions. [2023-02-16 03:31:21,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2023-02-16 03:31:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 181 transitions. [2023-02-16 03:31:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:31:21,136 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:21,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:21,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:31:21,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1910990356, now seen corresponding path program 1 times [2023-02-16 03:31:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:21,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21492439] [2023-02-16 03:31:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:21,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:21,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:31:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:21,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21492439] [2023-02-16 03:31:21,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21492439] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:21,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:21,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:21,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259768802] [2023-02-16 03:31:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:21,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:31:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:31:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:21,308 INFO L87 Difference]: Start difference. First operand 135 states and 181 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2023-02-16 03:31:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:21,504 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2023-02-16 03:31:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 15 [2023-02-16 03:31:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:21,506 INFO L225 Difference]: With dead ends: 155 [2023-02-16 03:31:21,506 INFO L226 Difference]: Without dead ends: 155 [2023-02-16 03:31:21,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:31:21,508 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 289 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:21,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 186 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-16 03:31:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2023-02-16 03:31:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 122 states have internal predecessors, (155), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2023-02-16 03:31:21,518 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 15 [2023-02-16 03:31:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:21,519 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2023-02-16 03:31:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2023-02-16 03:31:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2023-02-16 03:31:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 03:31:21,520 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:21,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:21,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 03:31:21,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1007148901, now seen corresponding path program 1 times [2023-02-16 03:31:21,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724142110] [2023-02-16 03:31:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:21,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:21,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724142110] [2023-02-16 03:31:21,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724142110] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205425873] [2023-02-16 03:31:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:21,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:21,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:21,641 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) [2023-02-16 03:31:21,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:31:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:21,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 03:31:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:21,813 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 [2023-02-16 03:31:21,869 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:31:21,870 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 18 [2023-02-16 03:31:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:22,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:22,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205425873] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:31:22,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:31:22,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2023-02-16 03:31:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185797829] [2023-02-16 03:31:22,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:22,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 03:31:22,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 03:31:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:31:22,210 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:22,698 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2023-02-16 03:31:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:31:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-16 03:31:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:22,700 INFO L225 Difference]: With dead ends: 200 [2023-02-16 03:31:22,700 INFO L226 Difference]: Without dead ends: 200 [2023-02-16 03:31:22,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:31:22,701 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 354 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:22,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 447 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:31:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-16 03:31:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2023-02-16 03:31:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.65) internal successors, (165), 128 states have internal predecessors, (165), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-16 03:31:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2023-02-16 03:31:22,706 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 16 [2023-02-16 03:31:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:22,707 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2023-02-16 03:31:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2023-02-16 03:31:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 03:31:22,707 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:22,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:22,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:22,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:22,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1007148902, now seen corresponding path program 1 times [2023-02-16 03:31:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:22,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844941886] [2023-02-16 03:31:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:22,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:23,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:23,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844941886] [2023-02-16 03:31:23,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844941886] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:23,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365312251] [2023-02-16 03:31:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:23,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:23,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:23,057 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) [2023-02-16 03:31:23,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:31:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 03:31:23,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:23,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:23,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:23,307 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 22 treesize of output 26 [2023-02-16 03:31:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:23,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365312251] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:31:23,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:31:23,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-16 03:31:23,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904296842] [2023-02-16 03:31:23,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:23,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:31:23,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:31:23,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:31:23,404 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:23,613 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2023-02-16 03:31:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:31:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-16 03:31:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:23,614 INFO L225 Difference]: With dead ends: 144 [2023-02-16 03:31:23,614 INFO L226 Difference]: Without dead ends: 144 [2023-02-16 03:31:23,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:31:23,615 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 542 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:23,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 229 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-16 03:31:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2023-02-16 03:31:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 100 states have (on average 1.62) internal successors, (162), 127 states have internal predecessors, (162), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-16 03:31:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 184 transitions. [2023-02-16 03:31:23,625 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 184 transitions. Word has length 16 [2023-02-16 03:31:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:23,627 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 184 transitions. [2023-02-16 03:31:23,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 184 transitions. [2023-02-16 03:31:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 03:31:23,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:23,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:23,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:23,835 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,SelfDestructingSolverStorable9 [2023-02-16 03:31:23,836 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash -992190633, now seen corresponding path program 1 times [2023-02-16 03:31:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137160803] [2023-02-16 03:31:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:24,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:31:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:24,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:24,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137160803] [2023-02-16 03:31:24,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137160803] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:24,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:24,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:31:24,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249922900] [2023-02-16 03:31:24,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:24,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:31:24,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:24,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:31:24,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:31:24,109 INFO L87 Difference]: Start difference. First operand 142 states and 184 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2023-02-16 03:31:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:24,318 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2023-02-16 03:31:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:31:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 19 [2023-02-16 03:31:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:24,320 INFO L225 Difference]: With dead ends: 190 [2023-02-16 03:31:24,320 INFO L226 Difference]: Without dead ends: 190 [2023-02-16 03:31:24,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:31:24,321 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 192 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:24,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 411 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-16 03:31:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 150. [2023-02-16 03:31:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 107 states have (on average 1.5981308411214954) internal successors, (171), 134 states have internal predecessors, (171), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-16 03:31:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 195 transitions. [2023-02-16 03:31:24,326 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 195 transitions. Word has length 19 [2023-02-16 03:31:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:24,326 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 195 transitions. [2023-02-16 03:31:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2023-02-16 03:31:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 195 transitions. [2023-02-16 03:31:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 03:31:24,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:24,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:24,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 03:31:24,328 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 343557913, now seen corresponding path program 1 times [2023-02-16 03:31:24,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:24,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955074225] [2023-02-16 03:31:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:24,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:24,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:31:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:24,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955074225] [2023-02-16 03:31:24,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955074225] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:24,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:24,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:31:24,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269460366] [2023-02-16 03:31:24,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:24,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:31:24,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:24,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:31:24,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:24,549 INFO L87 Difference]: Start difference. First operand 150 states and 195 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2023-02-16 03:31:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:24,702 INFO L93 Difference]: Finished difference Result 185 states and 236 transitions. [2023-02-16 03:31:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:31:24,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 21 [2023-02-16 03:31:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:24,703 INFO L225 Difference]: With dead ends: 185 [2023-02-16 03:31:24,703 INFO L226 Difference]: Without dead ends: 185 [2023-02-16 03:31:24,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:31:24,704 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 138 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:24,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 397 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-16 03:31:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 152. [2023-02-16 03:31:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 109 states have (on average 1.5871559633027523) internal successors, (173), 136 states have internal predecessors, (173), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-16 03:31:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 197 transitions. [2023-02-16 03:31:24,710 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 197 transitions. Word has length 21 [2023-02-16 03:31:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:24,710 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 197 transitions. [2023-02-16 03:31:24,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2023-02-16 03:31:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 197 transitions. [2023-02-16 03:31:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:31:24,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:24,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:24,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-16 03:31:24,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash 451808416, now seen corresponding path program 1 times [2023-02-16 03:31:24,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:24,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922162906] [2023-02-16 03:31:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:25,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922162906] [2023-02-16 03:31:25,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922162906] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:25,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819733226] [2023-02-16 03:31:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:25,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:25,010 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) [2023-02-16 03:31:25,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:31:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 03:31:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:25,133 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 [2023-02-16 03:31:25,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:31:25,217 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 21 treesize of output 9 [2023-02-16 03:31:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:25,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:25,274 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 34 treesize of output 28 [2023-02-16 03:31:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:25,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819733226] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:31:25,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:31:25,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2023-02-16 03:31:25,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593338159] [2023-02-16 03:31:25,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:25,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 03:31:25,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:25,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 03:31:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:31:25,358 INFO L87 Difference]: Start difference. First operand 152 states and 197 transitions. Second operand has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:26,574 INFO L93 Difference]: Finished difference Result 505 states and 665 transitions. [2023-02-16 03:31:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 03:31:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 03:31:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:26,578 INFO L225 Difference]: With dead ends: 505 [2023-02-16 03:31:26,578 INFO L226 Difference]: Without dead ends: 505 [2023-02-16 03:31:26,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 03:31:26,579 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 756 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:26,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1140 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 03:31:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-02-16 03:31:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 202. [2023-02-16 03:31:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 177 states have internal predecessors, (234), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-16 03:31:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 274 transitions. [2023-02-16 03:31:26,601 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 274 transitions. Word has length 22 [2023-02-16 03:31:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:26,601 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 274 transitions. [2023-02-16 03:31:26,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 274 transitions. [2023-02-16 03:31:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:31:26,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:26,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:26,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:26,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:26,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 451808417, now seen corresponding path program 1 times [2023-02-16 03:31:26,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:26,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076207723] [2023-02-16 03:31:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:26,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076207723] [2023-02-16 03:31:27,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076207723] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971209141] [2023-02-16 03:31:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:27,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:27,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:27,145 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) [2023-02-16 03:31:27,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:31:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-16 03:31:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:27,266 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 [2023-02-16 03:31:27,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:31:27,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:31:27,454 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 19 treesize of output 7 [2023-02-16 03:31:27,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2023-02-16 03:31:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:27,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:27,734 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 34 treesize of output 28 [2023-02-16 03:31:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:27,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:27,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971209141] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:31:27,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:31:27,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2023-02-16 03:31:27,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024932145] [2023-02-16 03:31:27,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:27,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:31:27,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:31:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:31:27,815 INFO L87 Difference]: Start difference. First operand 202 states and 274 transitions. Second operand has 27 states, 24 states have (on average 2.25) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:29,881 INFO L93 Difference]: Finished difference Result 499 states and 655 transitions. [2023-02-16 03:31:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 03:31:29,882 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.25) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 03:31:29,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:29,884 INFO L225 Difference]: With dead ends: 499 [2023-02-16 03:31:29,884 INFO L226 Difference]: Without dead ends: 499 [2023-02-16 03:31:29,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 03:31:29,885 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 941 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:29,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 1830 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-16 03:31:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-02-16 03:31:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 237. [2023-02-16 03:31:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 176 states have (on average 1.5738636363636365) internal successors, (277), 206 states have internal predecessors, (277), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-16 03:31:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 327 transitions. [2023-02-16 03:31:29,895 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 327 transitions. Word has length 22 [2023-02-16 03:31:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:29,895 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 327 transitions. [2023-02-16 03:31:29,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.25) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 327 transitions. [2023-02-16 03:31:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 03:31:29,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:29,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:29,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:30,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:30,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1286860128, now seen corresponding path program 1 times [2023-02-16 03:31:30,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:30,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465291130] [2023-02-16 03:31:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:30,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:30,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:31:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:30,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:30,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465291130] [2023-02-16 03:31:30,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465291130] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916076351] [2023-02-16 03:31:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:30,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:30,188 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) [2023-02-16 03:31:30,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:31:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:31:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:30,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:30,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916076351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:31:30,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:31:30,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-16 03:31:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425406131] [2023-02-16 03:31:30,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:31:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:31:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:31:30,457 INFO L87 Difference]: Start difference. First operand 237 states and 327 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:31:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:30,878 INFO L93 Difference]: Finished difference Result 305 states and 387 transitions. [2023-02-16 03:31:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:31:30,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-02-16 03:31:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:30,881 INFO L225 Difference]: With dead ends: 305 [2023-02-16 03:31:30,881 INFO L226 Difference]: Without dead ends: 299 [2023-02-16 03:31:30,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-02-16 03:31:30,884 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 295 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:30,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 646 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:31:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-16 03:31:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 237. [2023-02-16 03:31:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 176 states have (on average 1.5568181818181819) internal successors, (274), 206 states have internal predecessors, (274), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-16 03:31:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 324 transitions. [2023-02-16 03:31:30,901 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 324 transitions. Word has length 21 [2023-02-16 03:31:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:30,902 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 324 transitions. [2023-02-16 03:31:30,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:31:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 324 transitions. [2023-02-16 03:31:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 03:31:30,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:30,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:30,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:31,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 03:31:31,104 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:31,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:31,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1821114983, now seen corresponding path program 1 times [2023-02-16 03:31:31,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:31,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803989643] [2023-02-16 03:31:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:31,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:31:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:31,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803989643] [2023-02-16 03:31:31,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803989643] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:31,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:31,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108891350] [2023-02-16 03:31:31,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:31,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:31,166 INFO L87 Difference]: Start difference. First operand 237 states and 324 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:31:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:31,187 INFO L93 Difference]: Finished difference Result 251 states and 342 transitions. [2023-02-16 03:31:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-16 03:31:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:31,189 INFO L225 Difference]: With dead ends: 251 [2023-02-16 03:31:31,189 INFO L226 Difference]: Without dead ends: 251 [2023-02-16 03:31:31,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:31,190 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 6 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:31,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 389 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:31:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-02-16 03:31:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2023-02-16 03:31:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 179 states have (on average 1.547486033519553) internal successors, (277), 214 states have internal predecessors, (277), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-16 03:31:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 337 transitions. [2023-02-16 03:31:31,198 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 337 transitions. Word has length 24 [2023-02-16 03:31:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:31,198 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 337 transitions. [2023-02-16 03:31:31,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:31:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 337 transitions. [2023-02-16 03:31:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 03:31:31,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:31,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:31,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-16 03:31:31,200 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1983275188, now seen corresponding path program 1 times [2023-02-16 03:31:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246758030] [2023-02-16 03:31:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:31,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:31:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:31,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246758030] [2023-02-16 03:31:31,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246758030] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:31,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:31,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:31:31,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151542580] [2023-02-16 03:31:31,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:31,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:31,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:31,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:31,257 INFO L87 Difference]: Start difference. First operand 246 states and 337 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-02-16 03:31:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:31,441 INFO L93 Difference]: Finished difference Result 304 states and 388 transitions. [2023-02-16 03:31:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:31:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 23 [2023-02-16 03:31:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:31,443 INFO L225 Difference]: With dead ends: 304 [2023-02-16 03:31:31,443 INFO L226 Difference]: Without dead ends: 304 [2023-02-16 03:31:31,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:31:31,443 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 206 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:31,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 254 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-02-16 03:31:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 245. [2023-02-16 03:31:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.5363128491620113) internal successors, (275), 213 states have internal predecessors, (275), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-16 03:31:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 335 transitions. [2023-02-16 03:31:31,450 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 335 transitions. Word has length 23 [2023-02-16 03:31:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:31,451 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 335 transitions. [2023-02-16 03:31:31,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-02-16 03:31:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 335 transitions. [2023-02-16 03:31:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 03:31:31,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:31,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-16 03:31:31,452 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1983275187, now seen corresponding path program 1 times [2023-02-16 03:31:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560363907] [2023-02-16 03:31:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:31,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:31:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:31,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:31,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560363907] [2023-02-16 03:31:31,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560363907] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:31,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:31,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:31:31,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062544563] [2023-02-16 03:31:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:31,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:31,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:31,551 INFO L87 Difference]: Start difference. First operand 245 states and 335 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-02-16 03:31:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:31,748 INFO L93 Difference]: Finished difference Result 302 states and 381 transitions. [2023-02-16 03:31:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 23 [2023-02-16 03:31:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:31,750 INFO L225 Difference]: With dead ends: 302 [2023-02-16 03:31:31,750 INFO L226 Difference]: Without dead ends: 302 [2023-02-16 03:31:31,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:31,751 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 194 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:31,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 347 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-02-16 03:31:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 239. [2023-02-16 03:31:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 179 states have (on average 1.4860335195530727) internal successors, (266), 207 states have internal predecessors, (266), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-16 03:31:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 326 transitions. [2023-02-16 03:31:31,762 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 326 transitions. Word has length 23 [2023-02-16 03:31:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:31,763 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 326 transitions. [2023-02-16 03:31:31,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-02-16 03:31:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 326 transitions. [2023-02-16 03:31:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:31:31,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:31,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:31,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-16 03:31:31,782 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2147398490, now seen corresponding path program 1 times [2023-02-16 03:31:31,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:31,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967457582] [2023-02-16 03:31:31,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:31,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:31:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967457582] [2023-02-16 03:31:32,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967457582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581856592] [2023-02-16 03:31:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:32,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:32,045 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) [2023-02-16 03:31:32,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:31:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 03:31:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:32,161 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 [2023-02-16 03:31:32,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:31:32,270 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 21 treesize of output 9 [2023-02-16 03:31:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:32,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:32,308 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 34 treesize of output 28 [2023-02-16 03:31:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:32,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581856592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:31:32,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:31:32,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 15 [2023-02-16 03:31:32,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946615184] [2023-02-16 03:31:32,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:32,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:31:32,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:31:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:31:32,386 INFO L87 Difference]: Start difference. First operand 239 states and 326 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:34,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:31:36,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:31:38,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:31:40,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:31:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:41,120 INFO L93 Difference]: Finished difference Result 399 states and 487 transitions. [2023-02-16 03:31:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:31:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-16 03:31:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:41,122 INFO L225 Difference]: With dead ends: 399 [2023-02-16 03:31:41,122 INFO L226 Difference]: Without dead ends: 399 [2023-02-16 03:31:41,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2023-02-16 03:31:41,123 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 374 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 35 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:41,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 954 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 840 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2023-02-16 03:31:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-02-16 03:31:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 284. [2023-02-16 03:31:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 213 states have (on average 1.4647887323943662) internal successors, (312), 243 states have internal predecessors, (312), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-16 03:31:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 386 transitions. [2023-02-16 03:31:41,136 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 386 transitions. Word has length 25 [2023-02-16 03:31:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:41,137 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 386 transitions. [2023-02-16 03:31:41,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 386 transitions. [2023-02-16 03:31:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:31:41,139 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:41,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:41,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:41,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:41,345 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2147398489, now seen corresponding path program 1 times [2023-02-16 03:31:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756326690] [2023-02-16 03:31:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:42,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:31:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:42,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:42,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756326690] [2023-02-16 03:31:42,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756326690] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:42,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973699498] [2023-02-16 03:31:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:42,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:42,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:42,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:31:42,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:31:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 03:31:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:42,261 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 [2023-02-16 03:31:42,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:31:42,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:31:42,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:42,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-02-16 03:31:42,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:42,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-02-16 03:31:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:42,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:42,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973699498] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:42,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:31:42,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2023-02-16 03:31:42,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040608611] [2023-02-16 03:31:42,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:42,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 03:31:42,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 03:31:42,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:31:42,909 INFO L87 Difference]: Start difference. First operand 284 states and 386 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:31:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:45,834 INFO L93 Difference]: Finished difference Result 497 states and 597 transitions. [2023-02-16 03:31:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 03:31:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-16 03:31:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:45,837 INFO L225 Difference]: With dead ends: 497 [2023-02-16 03:31:45,837 INFO L226 Difference]: Without dead ends: 497 [2023-02-16 03:31:45,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 03:31:45,838 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1373 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:45,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 992 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-16 03:31:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-02-16 03:31:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 318. [2023-02-16 03:31:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 238 states have (on average 1.4453781512605042) internal successors, (344), 270 states have internal predecessors, (344), 43 states have call successors, (43), 17 states have call predecessors, (43), 17 states have return successors, (43), 30 states have call predecessors, (43), 43 states have call successors, (43) [2023-02-16 03:31:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 430 transitions. [2023-02-16 03:31:45,848 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 430 transitions. Word has length 25 [2023-02-16 03:31:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:45,849 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 430 transitions. [2023-02-16 03:31:45,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:31:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 430 transitions. [2023-02-16 03:31:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:31:45,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:45,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:45,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:46,056 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1195361463, now seen corresponding path program 1 times [2023-02-16 03:31:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:46,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322153334] [2023-02-16 03:31:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:46,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:31:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:46,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:46,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322153334] [2023-02-16 03:31:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322153334] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:46,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:46,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:46,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494979520] [2023-02-16 03:31:46,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:46,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:31:46,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:31:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:46,140 INFO L87 Difference]: Start difference. First operand 318 states and 430 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:31:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:46,291 INFO L93 Difference]: Finished difference Result 328 states and 421 transitions. [2023-02-16 03:31:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-16 03:31:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:46,293 INFO L225 Difference]: With dead ends: 328 [2023-02-16 03:31:46,293 INFO L226 Difference]: Without dead ends: 328 [2023-02-16 03:31:46,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:31:46,294 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 141 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:46,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 197 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-02-16 03:31:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 315. [2023-02-16 03:31:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 238 states have (on average 1.3865546218487395) internal successors, (330), 267 states have internal predecessors, (330), 43 states have call successors, (43), 17 states have call predecessors, (43), 17 states have return successors, (43), 30 states have call predecessors, (43), 43 states have call successors, (43) [2023-02-16 03:31:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2023-02-16 03:31:46,308 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 416 transitions. Word has length 27 [2023-02-16 03:31:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:46,308 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 416 transitions. [2023-02-16 03:31:46,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:31:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 416 transitions. [2023-02-16 03:31:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:31:46,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:46,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-16 03:31:46,310 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1195361464, now seen corresponding path program 1 times [2023-02-16 03:31:46,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:46,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786993228] [2023-02-16 03:31:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:31:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:46,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786993228] [2023-02-16 03:31:46,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786993228] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:46,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:46,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:46,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910760577] [2023-02-16 03:31:46,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:46,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:31:46,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:31:46,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:46,420 INFO L87 Difference]: Start difference. First operand 315 states and 416 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:31:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:46,605 INFO L93 Difference]: Finished difference Result 326 states and 414 transitions. [2023-02-16 03:31:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:46,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-16 03:31:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:46,609 INFO L225 Difference]: With dead ends: 326 [2023-02-16 03:31:46,609 INFO L226 Difference]: Without dead ends: 326 [2023-02-16 03:31:46,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:31:46,609 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 166 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:46,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 211 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-02-16 03:31:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 315. [2023-02-16 03:31:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 238 states have (on average 1.3529411764705883) internal successors, (322), 267 states have internal predecessors, (322), 43 states have call successors, (43), 17 states have call predecessors, (43), 17 states have return successors, (43), 30 states have call predecessors, (43), 43 states have call successors, (43) [2023-02-16 03:31:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 408 transitions. [2023-02-16 03:31:46,618 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 408 transitions. Word has length 27 [2023-02-16 03:31:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:46,618 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 408 transitions. [2023-02-16 03:31:46,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:31:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 408 transitions. [2023-02-16 03:31:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:31:46,620 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:46,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:46,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-16 03:31:46,621 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:46,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1109218320, now seen corresponding path program 1 times [2023-02-16 03:31:46,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732362838] [2023-02-16 03:31:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:46,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:31:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:31:46,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732362838] [2023-02-16 03:31:46,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732362838] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:46,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:46,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:46,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835438903] [2023-02-16 03:31:46,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:46,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:46,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:46,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:46,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:46,736 INFO L87 Difference]: Start difference. First operand 315 states and 408 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-02-16 03:31:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:46,756 INFO L93 Difference]: Finished difference Result 333 states and 432 transitions. [2023-02-16 03:31:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:46,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 27 [2023-02-16 03:31:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:46,759 INFO L225 Difference]: With dead ends: 333 [2023-02-16 03:31:46,759 INFO L226 Difference]: Without dead ends: 327 [2023-02-16 03:31:46,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:46,760 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:46,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 370 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:31:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-16 03:31:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 321. [2023-02-16 03:31:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 241 states have (on average 1.3485477178423237) internal successors, (325), 273 states have internal predecessors, (325), 43 states have call successors, (43), 17 states have call predecessors, (43), 20 states have return successors, (49), 30 states have call predecessors, (49), 43 states have call successors, (49) [2023-02-16 03:31:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 417 transitions. [2023-02-16 03:31:46,771 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 417 transitions. Word has length 27 [2023-02-16 03:31:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:46,771 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 417 transitions. [2023-02-16 03:31:46,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-02-16 03:31:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 417 transitions. [2023-02-16 03:31:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:31:46,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:46,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:46,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-16 03:31:46,772 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:31:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1709630296, now seen corresponding path program 1 times [2023-02-16 03:31:46,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:46,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71893524] [2023-02-16 03:31:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:46,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:47,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:31:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:47,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71893524] [2023-02-16 03:31:47,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71893524] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955068748] [2023-02-16 03:31:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:47,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:47,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:31:47,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:31:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:47,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-16 03:31:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:47,415 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 [2023-02-16 03:31:47,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:31:47,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:31:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:47,448 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 21 treesize of output 20 [2023-02-16 03:31:47,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:47,455 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 21 treesize of output 20 [2023-02-16 03:31:47,538 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:31:47,538 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 17 treesize of output 21 [2023-02-16 03:31:47,603 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 23 treesize of output 23 [2023-02-16 03:31:47,614 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 23 treesize of output 23 [2023-02-16 03:31:47,633 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 23 treesize of output 23 [2023-02-16 03:31:47,650 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 23 treesize of output 23 [2023-02-16 03:31:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:47,694 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2023-02-16 03:31:47,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2023-02-16 03:31:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:47,723 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2023-02-16 03:31:47,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2023-02-16 03:31:48,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 102 [2023-02-16 03:31:48,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-02-16 03:31:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:48,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:48,986 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_854 (Array Int Int)) (v_ArrVal_853 (Array Int Int)) (|ULTIMATE.start_main_~tail~0#1.offset| Int)) (let ((.cse1 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4))) (or (forall ((v_ArrVal_857 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_853))) (store .cse0 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse1 v_ArrVal_857))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (= 1 (select |c_#valid| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_854))) (store .cse2 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse1 |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)))))) (forall ((v_ArrVal_854 (Array Int Int)) (|ULTIMATE.start_main_~tail~0#1.offset| Int)) (let ((.cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_854))) (store .cse4 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (= 1 (select |c_#valid| .cse3)) (= .cse3 0))))) is different from false [2023-02-16 03:31:51,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:51,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 54 [2023-02-16 03:31:51,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2023-02-16 03:31:51,421 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 54 treesize of output 50 [2023-02-16 03:31:51,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2023-02-16 03:31:51,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:51,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-02-16 03:31:51,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:51,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-02-16 03:31:51,512 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 50 treesize of output 44 [2023-02-16 03:31:51,518 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 60 treesize of output 54 [2023-02-16 03:31:51,531 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 27 treesize of output 25 [2023-02-16 03:31:51,535 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:31:51,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-16 03:31:51,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:51,543 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 15 treesize of output 9 [2023-02-16 03:31:51,548 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:31:51,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-02-16 03:32:03,625 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification. DAG size of input: 21 DAG size of output: 13 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:32:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:32:03,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955068748] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:32:03,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:32:03,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-02-16 03:32:03,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636641681] [2023-02-16 03:32:03,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:32:03,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 03:32:03,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:03,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 03:32:03,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=814, Unknown=6, NotChecked=58, Total=992 [2023-02-16 03:32:03,630 INFO L87 Difference]: Start difference. First operand 321 states and 417 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:32:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:11,953 INFO L93 Difference]: Finished difference Result 424 states and 528 transitions. [2023-02-16 03:32:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:32:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-02-16 03:32:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:11,955 INFO L225 Difference]: With dead ends: 424 [2023-02-16 03:32:11,955 INFO L226 Difference]: Without dead ends: 424 [2023-02-16 03:32:11,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=422, Invalid=1738, Unknown=6, NotChecked=90, Total=2256 [2023-02-16 03:32:11,957 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1184 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:11,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 1316 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1507 Invalid, 0 Unknown, 169 Unchecked, 2.6s Time] [2023-02-16 03:32:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-02-16 03:32:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 347. [2023-02-16 03:32:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 259 states have (on average 1.335907335907336) internal successors, (346), 293 states have internal predecessors, (346), 48 states have call successors, (48), 20 states have call predecessors, (48), 23 states have return successors, (54), 33 states have call predecessors, (54), 48 states have call successors, (54) [2023-02-16 03:32:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 448 transitions. [2023-02-16 03:32:11,967 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 448 transitions. Word has length 27 [2023-02-16 03:32:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:11,967 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 448 transitions. [2023-02-16 03:32:11,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:32:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 448 transitions. [2023-02-16 03:32:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 03:32:11,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:11,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:11,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:32:12,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-16 03:32:12,174 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:32:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1952238210, now seen corresponding path program 1 times [2023-02-16 03:32:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:12,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456250613] [2023-02-16 03:32:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:32:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:32:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:32:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:12,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456250613] [2023-02-16 03:32:12,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456250613] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:32:12,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:32:12,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:32:12,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022793463] [2023-02-16 03:32:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:32:12,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:32:12,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:32:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:32:12,218 INFO L87 Difference]: Start difference. First operand 347 states and 448 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:12,248 INFO L93 Difference]: Finished difference Result 348 states and 433 transitions. [2023-02-16 03:32:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:32:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-02-16 03:32:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:12,250 INFO L225 Difference]: With dead ends: 348 [2023-02-16 03:32:12,250 INFO L226 Difference]: Without dead ends: 348 [2023-02-16 03:32:12,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:32:12,250 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 40 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:12,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 256 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:32:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-02-16 03:32:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 330. [2023-02-16 03:32:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 252 states have (on average 1.3253968253968254) internal successors, (334), 282 states have internal predecessors, (334), 39 states have call successors, (39), 19 states have call predecessors, (39), 22 states have return successors, (45), 28 states have call predecessors, (45), 39 states have call successors, (45) [2023-02-16 03:32:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 418 transitions. [2023-02-16 03:32:12,259 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 418 transitions. Word has length 30 [2023-02-16 03:32:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:12,259 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 418 transitions. [2023-02-16 03:32:12,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 418 transitions. [2023-02-16 03:32:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 03:32:12,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:12,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:12,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-16 03:32:12,261 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:32:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1439567607, now seen corresponding path program 1 times [2023-02-16 03:32:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757729689] [2023-02-16 03:32:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:32:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:32:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:32:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757729689] [2023-02-16 03:32:12,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757729689] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:32:12,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:32:12,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:32:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115090607] [2023-02-16 03:32:12,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:32:12,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:32:12,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:32:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:32:12,502 INFO L87 Difference]: Start difference. First operand 330 states and 418 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:12,682 INFO L93 Difference]: Finished difference Result 350 states and 441 transitions. [2023-02-16 03:32:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:32:12,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-02-16 03:32:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:12,684 INFO L225 Difference]: With dead ends: 350 [2023-02-16 03:32:12,684 INFO L226 Difference]: Without dead ends: 350 [2023-02-16 03:32:12,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:32:12,685 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 102 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:12,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 374 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:32:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-02-16 03:32:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 336. [2023-02-16 03:32:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 257 states have (on average 1.3151750972762646) internal successors, (338), 287 states have internal predecessors, (338), 40 states have call successors, (40), 19 states have call predecessors, (40), 22 states have return successors, (46), 29 states have call predecessors, (46), 40 states have call successors, (46) [2023-02-16 03:32:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 424 transitions. [2023-02-16 03:32:12,692 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 424 transitions. Word has length 30 [2023-02-16 03:32:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:12,692 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 424 transitions. [2023-02-16 03:32:12,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 424 transitions. [2023-02-16 03:32:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 03:32:12,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:12,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:12,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-16 03:32:12,693 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:32:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash 453625093, now seen corresponding path program 1 times [2023-02-16 03:32:12,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:12,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156800108] [2023-02-16 03:32:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:12,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:32:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:32:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:32:12,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:12,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156800108] [2023-02-16 03:32:12,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156800108] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:32:12,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:32:12,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:32:12,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258559963] [2023-02-16 03:32:12,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:32:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:32:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:32:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:32:12,811 INFO L87 Difference]: Start difference. First operand 336 states and 424 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:12,967 INFO L93 Difference]: Finished difference Result 367 states and 458 transitions. [2023-02-16 03:32:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:32:12,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-02-16 03:32:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:12,969 INFO L225 Difference]: With dead ends: 367 [2023-02-16 03:32:12,969 INFO L226 Difference]: Without dead ends: 367 [2023-02-16 03:32:12,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:32:12,970 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 92 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:12,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 362 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:32:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-16 03:32:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 349. [2023-02-16 03:32:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 267 states have (on average 1.299625468164794) internal successors, (347), 298 states have internal predecessors, (347), 43 states have call successors, (43), 19 states have call predecessors, (43), 22 states have return successors, (49), 31 states have call predecessors, (49), 43 states have call successors, (49) [2023-02-16 03:32:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 439 transitions. [2023-02-16 03:32:12,977 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 439 transitions. Word has length 32 [2023-02-16 03:32:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:12,978 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 439 transitions. [2023-02-16 03:32:12,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 439 transitions. [2023-02-16 03:32:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 03:32:12,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:12,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-16 03:32:12,979 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:32:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1579548114, now seen corresponding path program 1 times [2023-02-16 03:32:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:12,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383305337] [2023-02-16 03:32:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:32:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:32:13,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383305337] [2023-02-16 03:32:13,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383305337] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300686224] [2023-02-16 03:32:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:13,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:13,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:32:13,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:32:13,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:32:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-16 03:32:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:32:13,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:32:13,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:32:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:13,902 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 21 treesize of output 20 [2023-02-16 03:32:13,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:13,913 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 21 treesize of output 20 [2023-02-16 03:32:13,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:13,996 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 14 treesize of output 16 [2023-02-16 03:32:14,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:14,005 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 14 treesize of output 16 [2023-02-16 03:32:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:14,020 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 14 treesize of output 16 [2023-02-16 03:32:14,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:14,032 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 14 treesize of output 16 [2023-02-16 03:32:14,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:14,042 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 21 treesize of output 20 [2023-02-16 03:32:14,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:14,048 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 21 treesize of output 20 [2023-02-16 03:32:14,281 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:32:14,281 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2023-02-16 03:32:14,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:14,289 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 20 treesize of output 22 [2023-02-16 03:32:14,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-02-16 03:32:14,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-16 03:32:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:32:14,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:32:14,324 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_997 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_997) |c_ULTIMATE.start_remove_~x#1.base|) |c_ULTIMATE.start_remove_~x#1.offset|) 0)) (forall ((v_ArrVal_998 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_998) |c_ULTIMATE.start_remove_~x#1.base|) |c_ULTIMATE.start_remove_~x#1.offset|) 0))) is different from false [2023-02-16 03:32:14,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300686224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:14,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:32:14,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-02-16 03:32:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723089732] [2023-02-16 03:32:14,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:32:14,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 03:32:14,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 03:32:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=435, Unknown=3, NotChecked=42, Total=552 [2023-02-16 03:32:14,468 INFO L87 Difference]: Start difference. First operand 349 states and 439 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:15,956 INFO L93 Difference]: Finished difference Result 393 states and 471 transitions. [2023-02-16 03:32:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 03:32:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-02-16 03:32:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:15,958 INFO L225 Difference]: With dead ends: 393 [2023-02-16 03:32:15,958 INFO L226 Difference]: Without dead ends: 393 [2023-02-16 03:32:15,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=1281, Unknown=3, NotChecked=78, Total=1722 [2023-02-16 03:32:15,959 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 599 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:15,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 679 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:32:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-02-16 03:32:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 339. [2023-02-16 03:32:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 258 states have (on average 1.2945736434108528) internal successors, (334), 289 states have internal predecessors, (334), 42 states have call successors, (42), 19 states have call predecessors, (42), 22 states have return successors, (48), 30 states have call predecessors, (48), 42 states have call successors, (48) [2023-02-16 03:32:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 424 transitions. [2023-02-16 03:32:15,967 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 424 transitions. Word has length 31 [2023-02-16 03:32:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:15,967 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 424 transitions. [2023-02-16 03:32:15,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:32:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 424 transitions. [2023-02-16 03:32:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 03:32:15,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:15,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:15,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:32:16,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-16 03:32:16,169 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-16 03:32:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash -575773780, now seen corresponding path program 1 times [2023-02-16 03:32:16,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:16,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171985965] [2023-02-16 03:32:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:16,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:32:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171985965] [2023-02-16 03:32:17,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171985965] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937194862] [2023-02-16 03:32:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:17,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:32:17,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:32:17,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:32:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-16 03:32:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:32:17,258 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:32:17,258 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 11 [2023-02-16 03:32:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:32:17,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:32:17,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:32:17,387 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 21 treesize of output 20 [2023-02-16 03:32:17,398 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 27 treesize of output 26 [2023-02-16 03:32:17,761 INFO L321 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2023-02-16 03:32:17,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 45 [2023-02-16 03:32:17,771 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-16 03:32:17,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 16 [2023-02-16 03:32:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:32:17,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:32:18,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:32:18,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2763 treesize of output 2524 [2023-02-16 03:32:18,456 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 72 treesize of output 66