./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.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/list-ext3-properties/dll_circular_traversal-1.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 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:48:26,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:48:26,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:48:26,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:48:26,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:48:26,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:48:26,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:48:26,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:48:26,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:48:26,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:48:26,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:48:26,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:48:26,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:48:26,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:48:26,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:48:26,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:48:26,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:48:26,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:48:26,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:48:26,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:48:26,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:48:26,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:48:26,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:48:26,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:48:26,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:48:26,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:48:26,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:48:26,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:48:26,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:48:26,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:48:26,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:48:26,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:48:26,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:48:26,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:48:26,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:48:26,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:48:26,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:48:26,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:48:26,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:48:26,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:48:26,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:48:26,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:48:26,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:48:26,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:48:26,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:48:26,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:48:26,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:48:26,669 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:48:26,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:48:26,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:48:26,670 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:48:26,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:48:26,670 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:48:26,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:48:26,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:48:26,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:48:26,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:48:26,671 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:48:26,671 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:48:26,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:48:26,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:48:26,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:48:26,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:48:26,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:48:26,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:48:26,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:48:26,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:48:26,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:48:26,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:48:26,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:48:26,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:48:26,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:48:26,673 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:48:26,674 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:48:26,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:48:26,674 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:48:26,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa [2023-02-16 03:48:26,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:48:26,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:48:26,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:48:26,919 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:48:26,920 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:48:26,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2023-02-16 03:48:27,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:48:28,075 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:48:28,076 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2023-02-16 03:48:28,085 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0558eb63/e190111e5c394bda89da238294f03c6d/FLAG2f0cdaafc [2023-02-16 03:48:28,097 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0558eb63/e190111e5c394bda89da238294f03c6d [2023-02-16 03:48:28,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:48:28,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:48:28,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:48:28,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:48:28,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:48:28,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff0ff99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28, skipping insertion in model container [2023-02-16 03:48:28,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:48:28,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:48:28,334 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i[24175,24188] [2023-02-16 03:48:28,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:48:28,347 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:48:28,393 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i[24175,24188] [2023-02-16 03:48:28,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:48:28,416 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:48:28,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28 WrapperNode [2023-02-16 03:48:28,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:48:28,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:48:28,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:48:28,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:48:28,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,460 INFO L138 Inliner]: procedures = 122, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2023-02-16 03:48:28,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:48:28,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:48:28,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:48:28,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:48:28,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:48:28,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:48:28,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:48:28,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:48:28,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (1/1) ... [2023-02-16 03:48:28,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:48:28,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:28,518 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 03:48:28,537 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 03:48:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-16 03:48:28,563 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-16 03:48:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:48:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:48:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:48:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:48:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:48:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:48:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:48:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:48:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:48:28,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:48:28,631 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:48:28,632 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:48:28,663 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-16 03:48:28,859 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:48:28,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:48:28,864 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 03:48:28,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:48:28 BoogieIcfgContainer [2023-02-16 03:48:28,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:48:28,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:48:28,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:48:28,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:48:28,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:48:28" (1/3) ... [2023-02-16 03:48:28,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a7d84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:48:28, skipping insertion in model container [2023-02-16 03:48:28,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:48:28" (2/3) ... [2023-02-16 03:48:28,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a7d84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:48:28, skipping insertion in model container [2023-02-16 03:48:28,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:48:28" (3/3) ... [2023-02-16 03:48:28,871 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-1.i [2023-02-16 03:48:28,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:48:28,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-02-16 03:48:28,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:48:28,915 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;@2eacf162, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:48:28,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-02-16 03:48:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:48:28,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:28,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:48:28,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1079622, now seen corresponding path program 1 times [2023-02-16 03:48:28,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:28,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695073946] [2023-02-16 03:48:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:28,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:29,145 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 03:48:29,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:29,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695073946] [2023-02-16 03:48:29,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695073946] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:29,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:29,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:48:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322547828] [2023-02-16 03:48:29,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:29,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:48:29,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:29,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:48:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:48:29,187 INFO L87 Difference]: Start difference. First operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 03:48:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:29,277 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-02-16 03:48:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:48:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-02-16 03:48:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:29,287 INFO L225 Difference]: With dead ends: 91 [2023-02-16 03:48:29,288 INFO L226 Difference]: Without dead ends: 83 [2023-02-16 03:48:29,289 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 03:48:29,293 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:29,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-16 03:48:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2023-02-16 03:48:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.864864864864865) internal successors, (69), 64 states have internal predecessors, (69), 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 03:48:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-02-16 03:48:29,318 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 4 [2023-02-16 03:48:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:29,318 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-02-16 03:48:29,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 03:48:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-02-16 03:48:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:48:29,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:29,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:48:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:48:29,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1079623, now seen corresponding path program 1 times [2023-02-16 03:48:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:29,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296924503] [2023-02-16 03:48:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:29,378 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 03:48:29,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296924503] [2023-02-16 03:48:29,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296924503] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:29,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:29,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:48:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244181492] [2023-02-16 03:48:29,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:29,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:48:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:48:29,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:48:29,381 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 03:48:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:29,430 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-02-16 03:48:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:48:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-02-16 03:48:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:29,431 INFO L225 Difference]: With dead ends: 61 [2023-02-16 03:48:29,431 INFO L226 Difference]: Without dead ends: 61 [2023-02-16 03:48:29,432 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 03:48:29,433 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:29,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:48:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-16 03:48:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-16 03:48:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 60 states have internal predecessors, (65), 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 03:48:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-02-16 03:48:29,437 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 4 [2023-02-16 03:48:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:29,437 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-02-16 03:48:29,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 03:48:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-02-16 03:48:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:48:29,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:29,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:29,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:48:29,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash -401980428, now seen corresponding path program 1 times [2023-02-16 03:48:29,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:29,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882406227] [2023-02-16 03:48:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:29,502 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 03:48:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882406227] [2023-02-16 03:48:29,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882406227] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:29,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:29,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:48:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466103798] [2023-02-16 03:48:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:48:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:48:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:48:29,505 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:29,556 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2023-02-16 03:48:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:48:29,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:29,558 INFO L225 Difference]: With dead ends: 100 [2023-02-16 03:48:29,558 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 03:48:29,558 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 03:48:29,559 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 50 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:29,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 110 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:48:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 03:48:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 59. [2023-02-16 03:48:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 58 states have internal predecessors, (63), 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 03:48:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-02-16 03:48:29,563 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 10 [2023-02-16 03:48:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:29,564 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-02-16 03:48:29,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-02-16 03:48:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:48:29,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:29,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:29,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:48:29,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash -401980427, now seen corresponding path program 1 times [2023-02-16 03:48:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:29,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939148909] [2023-02-16 03:48:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:29,644 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 03:48:29,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:29,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939148909] [2023-02-16 03:48:29,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939148909] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:29,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:29,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:48:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748863094] [2023-02-16 03:48:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:29,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:48:29,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:48:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:48:29,647 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:29,690 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2023-02-16 03:48:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:48:29,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:29,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:29,691 INFO L225 Difference]: With dead ends: 100 [2023-02-16 03:48:29,692 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 03:48:29,692 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 03:48:29,693 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 52 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:29,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:48:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 03:48:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2023-02-16 03:48:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 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 03:48:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-02-16 03:48:29,697 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 10 [2023-02-16 03:48:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:29,697 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-02-16 03:48:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-02-16 03:48:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:48:29,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:29,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:29,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:48:29,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -401981869, now seen corresponding path program 1 times [2023-02-16 03:48:29,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:29,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244887509] [2023-02-16 03:48:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:29,757 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 03:48:29,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:29,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244887509] [2023-02-16 03:48:29,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244887509] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:29,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:29,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:48:29,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081948215] [2023-02-16 03:48:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:29,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:48:29,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:29,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:48:29,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:48:29,760 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 03:48:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:29,765 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2023-02-16 03:48:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:48:29,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 03:48:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:29,766 INFO L225 Difference]: With dead ends: 65 [2023-02-16 03:48:29,766 INFO L226 Difference]: Without dead ends: 65 [2023-02-16 03:48:29,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 03:48:29,767 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:29,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:48:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-16 03:48:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2023-02-16 03:48:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.631578947368421) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-02-16 03:48:29,771 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 10 [2023-02-16 03:48:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:29,771 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-02-16 03:48:29,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 03:48:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-02-16 03:48:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 03:48:29,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:29,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:29,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:48:29,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:29,773 INFO L85 PathProgramCache]: Analyzing trace with hash 243865783, now seen corresponding path program 1 times [2023-02-16 03:48:29,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:29,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779150226] [2023-02-16 03:48:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:29,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:29,870 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 03:48:29,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779150226] [2023-02-16 03:48:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779150226] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:29,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:29,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:48:29,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833417969] [2023-02-16 03:48:29,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:29,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:48:29,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:29,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:48:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:48:29,874 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:29,955 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-02-16 03:48:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:48:29,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 03:48:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:29,957 INFO L225 Difference]: With dead ends: 81 [2023-02-16 03:48:29,957 INFO L226 Difference]: Without dead ends: 81 [2023-02-16 03:48:29,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:48:29,962 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:29,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 74 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-16 03:48:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2023-02-16 03:48:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 61 states have internal predecessors, (67), 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 03:48:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2023-02-16 03:48:29,975 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 12 [2023-02-16 03:48:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:29,975 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2023-02-16 03:48:29,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2023-02-16 03:48:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 03:48:29,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:29,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:29,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:48:29,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 243865784, now seen corresponding path program 1 times [2023-02-16 03:48:29,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190235461] [2023-02-16 03:48:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:29,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:30,163 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 03:48:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:30,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190235461] [2023-02-16 03:48:30,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190235461] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:30,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:30,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:48:30,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496848122] [2023-02-16 03:48:30,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:30,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:48:30,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:48:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:48:30,166 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:30,263 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-02-16 03:48:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:48:30,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 03:48:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:30,266 INFO L225 Difference]: With dead ends: 81 [2023-02-16 03:48:30,266 INFO L226 Difference]: Without dead ends: 81 [2023-02-16 03:48:30,266 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 03:48:30,267 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:30,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 58 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-16 03:48:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2023-02-16 03:48:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-02-16 03:48:30,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 12 [2023-02-16 03:48:30,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:30,279 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-02-16 03:48:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-02-16 03:48:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 03:48:30,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:30,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:30,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:48:30,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:30,282 INFO L85 PathProgramCache]: Analyzing trace with hash -27720857, now seen corresponding path program 1 times [2023-02-16 03:48:30,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:30,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489629323] [2023-02-16 03:48:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:30,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:30,353 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 03:48:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:30,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489629323] [2023-02-16 03:48:30,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489629323] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:30,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:30,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:48:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921882685] [2023-02-16 03:48:30,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:30,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:48:30,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:48:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:48:30,355 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 03:48:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:30,428 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2023-02-16 03:48:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:48:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2023-02-16 03:48:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:30,433 INFO L225 Difference]: With dead ends: 78 [2023-02-16 03:48:30,434 INFO L226 Difference]: Without dead ends: 78 [2023-02-16 03:48:30,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 03:48:30,434 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:30,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 65 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-16 03:48:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2023-02-16 03:48:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 59 states have internal predecessors, (64), 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 03:48:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-02-16 03:48:30,437 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 16 [2023-02-16 03:48:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:30,440 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-02-16 03:48:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 03:48:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-02-16 03:48:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 03:48:30,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:30,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 03:48:30,441 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash -27720856, now seen corresponding path program 1 times [2023-02-16 03:48:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:30,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022920534] [2023-02-16 03:48:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:30,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:30,523 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 03:48:30,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:30,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022920534] [2023-02-16 03:48:30,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022920534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:30,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655246723] [2023-02-16 03:48:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:30,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:30,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:30,528 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 03:48:30,549 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 03:48:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 03:48:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:30,676 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 03:48:30,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:48:30,707 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 03:48:30,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655246723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:48:30,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:48:30,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-02-16 03:48:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561689294] [2023-02-16 03:48:30,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:48:30,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:48:30,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:48:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:48:30,712 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:30,723 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-02-16 03:48:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:48:30,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-16 03:48:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:30,724 INFO L225 Difference]: With dead ends: 76 [2023-02-16 03:48:30,724 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 03:48:30,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:48:30,726 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:30,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 207 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:48:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 03:48:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-02-16 03:48:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 73 states have internal predecessors, (80), 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 03:48:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2023-02-16 03:48:30,737 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 16 [2023-02-16 03:48:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:30,737 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2023-02-16 03:48:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2023-02-16 03:48:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 03:48:30,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:30,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:30,744 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 03:48:30,945 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 03:48:30,945 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash -868554548, now seen corresponding path program 1 times [2023-02-16 03:48:30,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:30,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937994562] [2023-02-16 03:48:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:48:31,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:31,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937994562] [2023-02-16 03:48:31,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937994562] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:31,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689166313] [2023-02-16 03:48:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:31,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:31,106 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 03:48:31,108 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 03:48:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 03:48:31,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:31,224 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 03:48:31,229 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 03:48:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:31,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-16 03:48:31,292 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:48:31,292 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 03:48:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:48:31,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:48:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:48:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689166313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:48:39,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:48:39,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-02-16 03:48:39,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159417527] [2023-02-16 03:48:39,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:48:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:48:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:48:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:48:39,618 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:39,767 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2023-02-16 03:48:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:48:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-16 03:48:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:39,768 INFO L225 Difference]: With dead ends: 90 [2023-02-16 03:48:39,768 INFO L226 Difference]: Without dead ends: 90 [2023-02-16 03:48:39,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:48:39,769 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 402 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:39,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 72 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-16 03:48:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2023-02-16 03:48:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 71 states have internal predecessors, (76), 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 03:48:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-02-16 03:48:39,770 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 18 [2023-02-16 03:48:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:39,771 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-02-16 03:48:39,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-02-16 03:48:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:48:39,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:39,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:39,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 03:48:39,976 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 03:48:39,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 140768543, now seen corresponding path program 1 times [2023-02-16 03:48:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269403861] [2023-02-16 03:48:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:48:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269403861] [2023-02-16 03:48:40,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269403861] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:40,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:40,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:48:40,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454760467] [2023-02-16 03:48:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:40,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:48:40,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:48:40,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:48:40,109 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:40,211 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2023-02-16 03:48:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:48:40,212 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), 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 37 [2023-02-16 03:48:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:40,213 INFO L225 Difference]: With dead ends: 88 [2023-02-16 03:48:40,213 INFO L226 Difference]: Without dead ends: 88 [2023-02-16 03:48:40,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:48:40,214 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 142 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:40,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 71 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-16 03:48:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2023-02-16 03:48:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 68 states have internal predecessors, (74), 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 03:48:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-02-16 03:48:40,216 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 37 [2023-02-16 03:48:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:40,217 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-02-16 03:48:40,217 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), 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 03:48:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-02-16 03:48:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:48:40,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:40,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:40,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 03:48:40,219 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash 140768544, now seen corresponding path program 1 times [2023-02-16 03:48:40,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:40,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052908612] [2023-02-16 03:48:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:40,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:48:40,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:40,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052908612] [2023-02-16 03:48:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052908612] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:40,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:40,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:48:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173708879] [2023-02-16 03:48:40,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:40,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:48:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:48:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:48:40,439 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:40,552 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-02-16 03:48:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:48:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-16 03:48:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:40,553 INFO L225 Difference]: With dead ends: 76 [2023-02-16 03:48:40,553 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 03:48:40,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:48:40,554 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:40,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 50 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 03:48:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-16 03:48:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 71 states have internal predecessors, (77), 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 03:48:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-02-16 03:48:40,556 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 37 [2023-02-16 03:48:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:40,556 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-02-16 03:48:40,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-02-16 03:48:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 03:48:40,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:40,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:40,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-16 03:48:40,561 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1747626123, now seen corresponding path program 1 times [2023-02-16 03:48:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:40,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302428763] [2023-02-16 03:48:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 03:48:41,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:41,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302428763] [2023-02-16 03:48:41,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302428763] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:41,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491029592] [2023-02-16 03:48:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:41,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:41,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:41,173 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 03:48:41,189 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 03:48:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-16 03:48:41,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:41,451 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:48:41,452 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 03:48:41,538 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-16 03:48:41,538 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 21 treesize of output 33 [2023-02-16 03:48:41,673 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-02-16 03:48:41,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:48:41,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:48:41,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 03:48:41,800 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 03:48:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:41,824 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 03:48:41,871 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 03:48:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:48:41,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:48:41,908 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_848 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_848) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2023-02-16 03:48:41,915 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_848 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_848) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2023-02-16 03:48:44,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:44,023 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 1 case distinctions, treesize of input 21 treesize of output 22 [2023-02-16 03:48:44,029 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 52 [2023-02-16 03:48:44,034 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 48 treesize of output 44 [2023-02-16 03:48:44,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-02-16 03:48:44,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:44,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 215 [2023-02-16 03:48:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-16 03:48:44,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491029592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:48:44,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:48:44,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 41 [2023-02-16 03:48:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102450330] [2023-02-16 03:48:44,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:48:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-16 03:48:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-16 03:48:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1317, Unknown=15, NotChecked=150, Total=1640 [2023-02-16 03:48:44,782 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 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 03:48:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:45,563 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2023-02-16 03:48:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:48:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-16 03:48:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:45,564 INFO L225 Difference]: With dead ends: 88 [2023-02-16 03:48:45,564 INFO L226 Difference]: Without dead ends: 88 [2023-02-16 03:48:45,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=471, Invalid=2072, Unknown=15, NotChecked=198, Total=2756 [2023-02-16 03:48:45,565 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 358 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:45,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 472 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 572 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2023-02-16 03:48:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-16 03:48:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2023-02-16 03:48:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 71 states have internal predecessors, (76), 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 03:48:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-02-16 03:48:45,566 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 40 [2023-02-16 03:48:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:45,567 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-02-16 03:48:45,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 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 03:48:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-02-16 03:48:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 03:48:45,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:45,567 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:45,575 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 03:48:45,773 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 03:48:45,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -56889687, now seen corresponding path program 1 times [2023-02-16 03:48:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:45,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879216917] [2023-02-16 03:48:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:48:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879216917] [2023-02-16 03:48:45,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879216917] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:45,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:45,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:48:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642080231] [2023-02-16 03:48:45,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:45,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:48:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:48:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:48:45,879 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:46,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:46,027 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2023-02-16 03:48:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:48:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-16 03:48:46,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:46,028 INFO L225 Difference]: With dead ends: 92 [2023-02-16 03:48:46,028 INFO L226 Difference]: Without dead ends: 92 [2023-02-16 03:48:46,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:48:46,029 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 157 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:46,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 88 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-16 03:48:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2023-02-16 03:48:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.25) internal successors, (75), 70 states have internal predecessors, (75), 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 03:48:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-02-16 03:48:46,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 43 [2023-02-16 03:48:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:46,031 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-02-16 03:48:46,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-02-16 03:48:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 03:48:46,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:46,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:46,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-16 03:48:46,032 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash -56889686, now seen corresponding path program 1 times [2023-02-16 03:48:46,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:46,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730194368] [2023-02-16 03:48:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:46,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:48:46,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:46,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730194368] [2023-02-16 03:48:46,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730194368] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:46,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:48:46,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:48:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038259149] [2023-02-16 03:48:46,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:48:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:48:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:48:46,220 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:46,322 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2023-02-16 03:48:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:48:46,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-16 03:48:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:46,323 INFO L225 Difference]: With dead ends: 74 [2023-02-16 03:48:46,323 INFO L226 Difference]: Without dead ends: 74 [2023-02-16 03:48:46,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:48:46,323 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:46,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-16 03:48:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2023-02-16 03:48:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 69 states have internal predecessors, (74), 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 03:48:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-02-16 03:48:46,325 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 43 [2023-02-16 03:48:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:46,325 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-02-16 03:48:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-02-16 03:48:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 03:48:46,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:46,325 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:46,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-16 03:48:46,326 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -56889649, now seen corresponding path program 1 times [2023-02-16 03:48:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:46,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971518945] [2023-02-16 03:48:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:48:47,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971518945] [2023-02-16 03:48:47,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971518945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991299461] [2023-02-16 03:48:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:47,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:47,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:47,181 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 03:48:47,230 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 03:48:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-16 03:48:47,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:47,395 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 03:48:47,458 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:48:47,459 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 03:48:47,490 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 03:48:47,495 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 03:48:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:47,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:48:47,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:47,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:48:47,567 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:48:47,567 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 46 treesize of output 45 [2023-02-16 03:48:47,572 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 22 treesize of output 24 [2023-02-16 03:48:47,657 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:48:47,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-16 03:48:47,669 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-16 03:48:47,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2023-02-16 03:48:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:47,729 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:47,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 73 [2023-02-16 03:48:47,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:47,734 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:47,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2023-02-16 03:48:47,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:47,894 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:47,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 71 [2023-02-16 03:48:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:47,900 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:47,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 56 [2023-02-16 03:48:47,917 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:48:47,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:47,921 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 61 [2023-02-16 03:48:47,925 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:48:47,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:47,930 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 42 [2023-02-16 03:48:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:48:48,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:48:48,353 INFO L321 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-02-16 03:48:48,354 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 21 treesize of output 20 [2023-02-16 03:48:48,417 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (.cse0 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4))) (and (or (forall ((v_ArrVal_1333 (Array Int Int)) (v_ArrVal_1328 Int)) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| v_ArrVal_1328)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1333) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) .cse0) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) (forall ((v_ArrVal_1332 (Array Int Int)) (v_ArrVal_1329 Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| v_ArrVal_1329)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1332) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) .cse0)))) (forall ((v_ArrVal_1332 (Array Int Int)) (v_ArrVal_1329 Int)) (let ((.cse2 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| v_ArrVal_1329)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1332) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) .cse0))) (or (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2) (= .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))))) is different from false [2023-02-16 03:48:48,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:48,424 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 25 treesize of output 31 [2023-02-16 03:48:48,426 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 36 treesize of output 24 [2023-02-16 03:48:48,428 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 7 treesize of output 3 [2023-02-16 03:48:48,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:48,436 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 25 treesize of output 31 [2023-02-16 03:48:48,438 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 36 treesize of output 24 [2023-02-16 03:48:48,441 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 7 treesize of output 3 [2023-02-16 03:48:48,445 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-02-16 03:48:48,446 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 51 treesize of output 1 [2023-02-16 03:48:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 1 not checked. [2023-02-16 03:48:48,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991299461] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:48:48,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:48:48,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 39 [2023-02-16 03:48:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770833900] [2023-02-16 03:48:48,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:48:48,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-16 03:48:48,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-16 03:48:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1351, Unknown=3, NotChecked=74, Total=1560 [2023-02-16 03:48:48,502 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 40 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 40 states have internal predecessors, (107), 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 03:48:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:50,786 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2023-02-16 03:48:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 03:48:50,786 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 40 states have internal predecessors, (107), 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 43 [2023-02-16 03:48:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:50,787 INFO L225 Difference]: With dead ends: 128 [2023-02-16 03:48:50,787 INFO L226 Difference]: Without dead ends: 128 [2023-02-16 03:48:50,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=586, Invalid=2721, Unknown=3, NotChecked=112, Total=3422 [2023-02-16 03:48:50,788 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 841 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:50,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 385 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 775 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2023-02-16 03:48:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-16 03:48:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 73. [2023-02-16 03:48:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.253968253968254) internal successors, (79), 72 states have internal predecessors, (79), 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 03:48:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2023-02-16 03:48:50,790 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 43 [2023-02-16 03:48:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:50,790 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2023-02-16 03:48:50,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 40 states have internal predecessors, (107), 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 03:48:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2023-02-16 03:48:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 03:48:50,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:50,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:50,796 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 03:48:50,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 03:48:50,996 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -56889648, now seen corresponding path program 1 times [2023-02-16 03:48:50,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:50,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915300877] [2023-02-16 03:48:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:48:52,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915300877] [2023-02-16 03:48:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915300877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383488216] [2023-02-16 03:48:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:52,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:52,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:52,024 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 03:48:52,026 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 03:48:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-16 03:48:52,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:52,208 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 03:48:52,267 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:48:52,268 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 03:48:52,292 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 03:48:52,296 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 03:48:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:52,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:48:52,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:52,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:48:52,336 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:48:52,336 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 54 treesize of output 53 [2023-02-16 03:48:52,338 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 52 treesize of output 50 [2023-02-16 03:48:52,398 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-16 03:48:52,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2023-02-16 03:48:52,405 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:48:52,405 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 1 case distinctions, treesize of input 30 treesize of output 25 [2023-02-16 03:48:52,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:52,459 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:52,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2023-02-16 03:48:52,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:52,466 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:52,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 73 [2023-02-16 03:48:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:52,614 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:52,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 56 [2023-02-16 03:48:52,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:52,618 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:48:52,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 71 [2023-02-16 03:48:52,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:48:52,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:52,652 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 61 [2023-02-16 03:48:52,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:48:52,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:52,660 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 42 [2023-02-16 03:48:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:48:52,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:48:53,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:53,263 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 47 treesize of output 51 [2023-02-16 03:48:53,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:53,537 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 51 treesize of output 43 [2023-02-16 03:48:53,541 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 61 treesize of output 43 [2023-02-16 03:48:53,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-02-16 03:48:53,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:53,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2023-02-16 03:48:53,562 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:48:53,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 8 [2023-02-16 03:48:53,569 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-02-16 03:48:53,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 1 [2023-02-16 03:48:53,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:53,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2023-02-16 03:48:53,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:48:53,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 8 [2023-02-16 03:48:53,601 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-02-16 03:48:53,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 1 [2023-02-16 03:48:53,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:53,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2023-02-16 03:48:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:48:53,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 8 [2023-02-16 03:48:53,617 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-02-16 03:48:53,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 1 [2023-02-16 03:48:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:48:53,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383488216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:48:53,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:48:53,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2023-02-16 03:48:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346213778] [2023-02-16 03:48:53,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:48:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-16 03:48:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-16 03:48:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1656, Unknown=2, NotChecked=0, Total=1806 [2023-02-16 03:48:53,765 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 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 03:48:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:57,183 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2023-02-16 03:48:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 03:48:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 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 43 [2023-02-16 03:48:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:57,184 INFO L225 Difference]: With dead ends: 143 [2023-02-16 03:48:57,184 INFO L226 Difference]: Without dead ends: 143 [2023-02-16 03:48:57,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=708, Invalid=3712, Unknown=2, NotChecked=0, Total=4422 [2023-02-16 03:48:57,186 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1011 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:57,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 330 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 03:48:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-16 03:48:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 75. [2023-02-16 03:48:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 74 states have internal predecessors, (81), 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 03:48:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-02-16 03:48:57,187 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 43 [2023-02-16 03:48:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:57,187 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-02-16 03:48:57,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 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 03:48:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-02-16 03:48:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 03:48:57,188 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:57,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 03:48:57,208 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 03:48:57,395 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,SelfDestructingSolverStorable16 [2023-02-16 03:48:57,395 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479191, now seen corresponding path program 1 times [2023-02-16 03:48:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:57,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277009469] [2023-02-16 03:48:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 03:48:57,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:57,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277009469] [2023-02-16 03:48:57,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277009469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:57,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374475138] [2023-02-16 03:48:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:57,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:57,974 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 03:48:57,976 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 03:48:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 03:48:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:58,161 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 03:48:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:58,209 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 22 [2023-02-16 03:48:58,231 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 03:48:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-16 03:48:58,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:48:58,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374475138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:58,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:48:58,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 19 [2023-02-16 03:48:58,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007612371] [2023-02-16 03:48:58,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:58,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 03:48:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 03:48:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-02-16 03:48:58,237 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:58,421 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2023-02-16 03:48:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:48:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-16 03:48:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:58,425 INFO L225 Difference]: With dead ends: 101 [2023-02-16 03:48:58,425 INFO L226 Difference]: Without dead ends: 101 [2023-02-16 03:48:58,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2023-02-16 03:48:58,428 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:58,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 124 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:48:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-16 03:48:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2023-02-16 03:48:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 78 states have internal predecessors, (86), 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 03:48:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2023-02-16 03:48:58,431 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 46 [2023-02-16 03:48:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:58,431 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2023-02-16 03:48:58,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:48:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2023-02-16 03:48:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 03:48:58,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:58,431 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 03:48:58,449 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 03:48:58,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 03:48:58,638 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:48:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479192, now seen corresponding path program 1 times [2023-02-16 03:48:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:58,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520155585] [2023-02-16 03:48:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:48:59,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:59,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520155585] [2023-02-16 03:48:59,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520155585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:59,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755578617] [2023-02-16 03:48:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:59,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:59,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:59,328 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 03:48:59,329 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 03:48:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-16 03:48:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:59,597 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 03:48:59,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:48:59,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:59,685 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 19 treesize of output 18 [2023-02-16 03:48:59,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:59,689 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 03:48:59,742 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 03:48:59,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-16 03:48:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:48:59,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:48:59,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755578617] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:48:59,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:48:59,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 28 [2023-02-16 03:48:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990383658] [2023-02-16 03:48:59,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:48:59,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 03:48:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 03:48:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2023-02-16 03:48:59,785 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:49:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:49:00,263 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2023-02-16 03:49:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:49:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-16 03:49:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:49:00,264 INFO L225 Difference]: With dead ends: 111 [2023-02-16 03:49:00,264 INFO L226 Difference]: Without dead ends: 111 [2023-02-16 03:49:00,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 03:49:00,265 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 390 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:49:00,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 140 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:49:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-16 03:49:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2023-02-16 03:49:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 82 states have internal predecessors, (91), 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 03:49:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2023-02-16 03:49:00,266 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 46 [2023-02-16 03:49:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:49:00,266 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2023-02-16 03:49:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:49:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2023-02-16 03:49:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 03:49:00,267 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:49:00,267 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:49:00,293 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 03:49:00,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:49:00,467 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-02-16 03:49:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:49:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1712591067, now seen corresponding path program 1 times [2023-02-16 03:49:00,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:49:00,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616685740] [2023-02-16 03:49:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:49:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:49:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:49:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:49:01,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:49:01,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616685740] [2023-02-16 03:49:01,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616685740] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:49:01,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267359606] [2023-02-16 03:49:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:49:01,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:49:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:49:01,966 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 03:49:01,968 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 03:49:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:49:02,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-16 03:49:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:49:02,221 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:49:02,222 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 14 [2023-02-16 03:49:02,274 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-02-16 03:49:02,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2023-02-16 03:49:02,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:49:02,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 03:49:02,453 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-16 03:49:02,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:49:02,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:49:02,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 03:49:02,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:49:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:02,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 03:49:02,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 03:49:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:02,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 03:49:02,668 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:49:02,668 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 88 [2023-02-16 03:49:02,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:02,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-02-16 03:49:02,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2023-02-16 03:49:02,794 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 43 treesize of output 34 [2023-02-16 03:49:02,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-16 03:49:02,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2023-02-16 03:49:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:02,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2023-02-16 03:49:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:02,893 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:49:02,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 42 [2023-02-16 03:49:02,901 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 18 treesize of output 20 [2023-02-16 03:49:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:03,078 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:49:03,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 50 [2023-02-16 03:49:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:03,090 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-02-16 03:49:03,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2023-02-16 03:49:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:03,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-16 03:49:03,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:49:03,153 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-16 03:49:03,153 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 03:49:03,165 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-02-16 03:49:03,165 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 60 treesize of output 37 [2023-02-16 03:49:03,291 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 03:49:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:49:03,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:49:05,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:49:05,224 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 177 treesize of output 143 [2023-02-16 03:49:05,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:49:05,238 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 1829 treesize of output 1803 [2023-02-16 03:49:05,246 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 2035 treesize of output 1971 [2023-02-16 03:49:05,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:49:05,262 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 1686 treesize of output 1184 [2023-02-16 03:49:05,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:49:05,295 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 7088 treesize of output 6934 [2023-02-16 03:49:05,319 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 8190 treesize of output 7870