./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-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 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:22:33,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:22:33,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:22:33,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:22:33,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:22:33,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:22:33,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:22:33,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:22:33,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:22:33,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:22:33,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:22:33,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:22:33,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:22:33,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:22:33,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:22:33,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:22:33,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:22:33,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:22:33,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:22:33,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:22:33,443 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:22:33,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:22:33,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:22:33,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:22:33,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:22:33,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:22:33,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:22:33,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:22:33,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:22:33,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:22:33,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:22:33,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:22:33,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:22:33,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:22:33,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:22:33,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:22:33,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:22:33,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:22:33,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:22:33,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:22:33,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:22:33,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:22:33,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:22:33,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:22:33,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:22:33,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:22:33,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:22:33,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:22:33,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:22:33,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:22:33,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:22:33,487 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:22:33,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:22:33,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:22:33,488 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:22:33,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:22:33,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:22:33,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:22:33,489 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:22:33,489 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:22:33,489 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:22:33,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:22:33,489 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:22:33,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:22:33,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:22:33,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:22:33,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:22:33,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:22:33,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:22:33,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:22:33,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:22:33,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:22:33,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:22:33,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2022-07-12 18:22:33,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:22:33,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:22:33,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:22:33,684 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:22:33,684 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:22:33,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2022-07-12 18:22:33,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ec5dfdf/f8eb5d0641974ae6bd0aa45d5559ab15/FLAGb06fb12ab [2022-07-12 18:22:34,124 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:22:34,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2022-07-12 18:22:34,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ec5dfdf/f8eb5d0641974ae6bd0aa45d5559ab15/FLAGb06fb12ab [2022-07-12 18:22:34,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ec5dfdf/f8eb5d0641974ae6bd0aa45d5559ab15 [2022-07-12 18:22:34,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:22:34,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:22:34,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:22:34,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:22:34,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:22:34,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168340da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34, skipping insertion in model container [2022-07-12 18:22:34,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:22:34,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:22:34,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:22:34,750 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:22:34,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:22:34,799 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:22:34,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34 WrapperNode [2022-07-12 18:22:34,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:22:34,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:22:34,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:22:34,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:22:34,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,852 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2022-07-12 18:22:34,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:22:34,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:22:34,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:22:34,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:22:34,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:22:34,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:22:34,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:22:34,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:22:34,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:22:34,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:34,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:22:34,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:22:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:22:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:22:34,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:22:34,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:22:34,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:22:34,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:22:34,996 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:22:34,997 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:22:35,181 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:22:35,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:22:35,192 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 18:22:35,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:22:35 BoogieIcfgContainer [2022-07-12 18:22:35,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:22:35,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:22:35,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:22:35,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:22:35,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:22:34" (1/3) ... [2022-07-12 18:22:35,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7242766b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:22:35, skipping insertion in model container [2022-07-12 18:22:35,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (2/3) ... [2022-07-12 18:22:35,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7242766b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:22:35, skipping insertion in model container [2022-07-12 18:22:35,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:22:35" (3/3) ... [2022-07-12 18:22:35,211 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2022-07-12 18:22:35,221 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:22:35,221 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-12 18:22:35,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:22:35,257 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5772bc7c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@301b69aa [2022-07-12 18:22:35,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-12 18:22:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:22:35,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-12 18:22:35,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104128910] [2022-07-12 18:22:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104128910] [2022-07-12 18:22:35,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104128910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:35,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668163170] [2022-07-12 18:22:35,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:35,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:35,478 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,528 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-07-12 18:22:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:22:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,534 INFO L225 Difference]: With dead ends: 92 [2022-07-12 18:22:35,535 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:22:35,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:35,540 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:22:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2022-07-12 18:22:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.78125) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-12 18:22:35,562 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 7 [2022-07-12 18:22:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,562 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-12 18:22:35,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-12 18:22:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:22:35,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:22:35,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-12 18:22:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881407468] [2022-07-12 18:22:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881407468] [2022-07-12 18:22:35,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881407468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:22:35,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612018809] [2022-07-12 18:22:35,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:22:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:22:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:22:35,605 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,640 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-12 18:22:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:22:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:22:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,642 INFO L225 Difference]: With dead ends: 49 [2022-07-12 18:22:35,642 INFO L226 Difference]: Without dead ends: 49 [2022-07-12 18:22:35,645 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 [2022-07-12 18:22:35,647 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-12 18:22:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-12 18:22:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.71875) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-12 18:22:35,657 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2022-07-12 18:22:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,657 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-12 18:22:35,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-12 18:22:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:22:35,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:22:35,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-12 18:22:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758467394] [2022-07-12 18:22:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758467394] [2022-07-12 18:22:35,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758467394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638847009] [2022-07-12 18:22:35,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:35,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:35,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:35,779 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,882 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-07-12 18:22:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:35,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:22:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,883 INFO L225 Difference]: With dead ends: 89 [2022-07-12 18:22:35,883 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 18:22:35,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:35,889 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 159 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 57 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 18:22:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2022-07-12 18:22:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-12 18:22:35,897 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 7 [2022-07-12 18:22:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,897 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-12 18:22:35,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-12 18:22:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 18:22:35,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:22:35,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-12 18:22:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546372830] [2022-07-12 18:22:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546372830] [2022-07-12 18:22:35,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546372830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65969402] [2022-07-12 18:22:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:35,960 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,990 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-12 18:22:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-12 18:22:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,994 INFO L225 Difference]: With dead ends: 50 [2022-07-12 18:22:35,994 INFO L226 Difference]: Without dead ends: 50 [2022-07-12 18:22:35,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:35,999 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-12 18:22:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-12 18:22:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-07-12 18:22:36,010 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 9 [2022-07-12 18:22:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,011 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-07-12 18:22:36,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-07-12 18:22:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 18:22:36,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:22:36,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-12 18:22:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998596369] [2022-07-12 18:22:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998596369] [2022-07-12 18:22:36,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998596369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:36,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911395926] [2022-07-12 18:22:36,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,095 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,113 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-07-12 18:22:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:36,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-12 18:22:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,114 INFO L225 Difference]: With dead ends: 90 [2022-07-12 18:22:36,114 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 18:22:36,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,115 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 66 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 94 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 18:22:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-07-12 18:22:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 18:22:36,118 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 9 [2022-07-12 18:22:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,118 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 18:22:36,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 18:22:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 18:22:36,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:22:36,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-12 18:22:36,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806578028] [2022-07-12 18:22:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806578028] [2022-07-12 18:22:36,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806578028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:22:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038781219] [2022-07-12 18:22:36,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:22:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:22:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:22:36,140 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,177 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-07-12 18:22:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:22:36,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-12 18:22:36,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,178 INFO L225 Difference]: With dead ends: 59 [2022-07-12 18:22:36,178 INFO L226 Difference]: Without dead ends: 59 [2022-07-12 18:22:36,178 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 [2022-07-12 18:22:36,180 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-12 18:22:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-12 18:22:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 58 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) [2022-07-12 18:22:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-12 18:22:36,187 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 9 [2022-07-12 18:22:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,187 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-12 18:22:36,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-12 18:22:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 18:22:36,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:22:36,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-12 18:22:36,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920425127] [2022-07-12 18:22:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920425127] [2022-07-12 18:22:36,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920425127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:36,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770076878] [2022-07-12 18:22:36,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:36,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:36,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:36,275 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,335 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2022-07-12 18:22:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-12 18:22:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,336 INFO L225 Difference]: With dead ends: 90 [2022-07-12 18:22:36,336 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 18:22:36,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:36,337 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 73 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 18:22:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-07-12 18:22:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-07-12 18:22:36,342 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 9 [2022-07-12 18:22:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,342 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-07-12 18:22:36,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-07-12 18:22:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:22:36,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 18:22:36,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-12 18:22:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778790347] [2022-07-12 18:22:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778790347] [2022-07-12 18:22:36,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778790347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:36,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258333654] [2022-07-12 18:22:36,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,380 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-07-12 18:22:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,399 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-07-12 18:22:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2022-07-12 18:22:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,400 INFO L225 Difference]: With dead ends: 60 [2022-07-12 18:22:36,400 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:22:36,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,401 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:22:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-12 18:22:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-12 18:22:36,403 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 10 [2022-07-12 18:22:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,403 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-12 18:22:36,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-07-12 18:22:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-12 18:22:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:22:36,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,404 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:22:36,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-12 18:22:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903788280] [2022-07-12 18:22:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903788280] [2022-07-12 18:22:36,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903788280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617460066] [2022-07-12 18:22:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:36,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:36,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:36,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:22:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:22:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:22:36,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:22:36,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617460066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:36,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:36,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-12 18:22:36,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813604573] [2022-07-12 18:22:36,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:22:36,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:22:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:36,823 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,987 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-07-12 18:22:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:22:36,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 11 [2022-07-12 18:22:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,988 INFO L225 Difference]: With dead ends: 137 [2022-07-12 18:22:36,988 INFO L226 Difference]: Without dead ends: 137 [2022-07-12 18:22:36,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:22:36,989 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 139 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 232 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-12 18:22:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 55. [2022-07-12 18:22:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 54 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) [2022-07-12 18:22:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-12 18:22:36,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 11 [2022-07-12 18:22:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,991 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-12 18:22:36,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-12 18:22:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:22:36,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:37,207 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 [2022-07-12 18:22:37,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-12 18:22:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:37,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359062587] [2022-07-12 18:22:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359062587] [2022-07-12 18:22:37,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359062587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:37,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:37,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:22:37,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037101190] [2022-07-12 18:22:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:37,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:22:37,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:37,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:22:37,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:37,254 INFO L87 Difference]: Start difference. First operand 55 states and 63 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) [2022-07-12 18:22:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:37,298 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-07-12 18:22:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:37,299 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 [2022-07-12 18:22:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:37,299 INFO L225 Difference]: With dead ends: 72 [2022-07-12 18:22:37,299 INFO L226 Difference]: Without dead ends: 72 [2022-07-12 18:22:37,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:22:37,300 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:37,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 58 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-12 18:22:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-07-12 18:22:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-07-12 18:22:37,302 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 12 [2022-07-12 18:22:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:37,302 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-07-12 18:22:37,303 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) [2022-07-12 18:22:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-07-12 18:22:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:22:37,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:37,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:22:37,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-12 18:22:37,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:37,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170569796] [2022-07-12 18:22:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:37,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170569796] [2022-07-12 18:22:37,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170569796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:37,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:37,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:37,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833382647] [2022-07-12 18:22:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:37,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:37,324 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:37,345 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-07-12 18:22:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:37,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:22:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:37,346 INFO L225 Difference]: With dead ends: 58 [2022-07-12 18:22:37,346 INFO L226 Difference]: Without dead ends: 58 [2022-07-12 18:22:37,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:37,347 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:37,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-12 18:22:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-12 18:22:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.4375) internal successors, (69), 57 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) [2022-07-12 18:22:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-07-12 18:22:37,349 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2022-07-12 18:22:37,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:37,349 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-07-12 18:22:37,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-07-12 18:22:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:22:37,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:37,350 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 18:22:37,350 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:37,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-12 18:22:37,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:37,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625289333] [2022-07-12 18:22:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:37,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625289333] [2022-07-12 18:22:37,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625289333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:37,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34864980] [2022-07-12 18:22:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:37,419 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:37,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:22:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:22:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:37,480 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:37,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34864980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:37,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:37,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-12 18:22:37,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508327151] [2022-07-12 18:22:37,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:37,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:22:37,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:22:37,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:37,652 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:37,796 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2022-07-12 18:22:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:22:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 18:22:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:37,797 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:22:37,797 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:22:37,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:22:37,797 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 172 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:37,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 199 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:22:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 55. [2022-07-12 18:22:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 54 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) [2022-07-12 18:22:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-07-12 18:22:37,800 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2022-07-12 18:22:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:37,800 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-07-12 18:22:37,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-07-12 18:22:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:22:37,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:37,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 18:22:38,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 172810975, now seen corresponding path program 1 times [2022-07-12 18:22:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822713260] [2022-07-12 18:22:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822713260] [2022-07-12 18:22:38,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822713260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:38,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093080154] [2022-07-12 18:22:38,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:38,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:38,039 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,068 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-12 18:22:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:22:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,069 INFO L225 Difference]: With dead ends: 54 [2022-07-12 18:22:38,069 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 18:22:38,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:38,070 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 18:22:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-12 18:22:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 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) [2022-07-12 18:22:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-12 18:22:38,072 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-07-12 18:22:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,073 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-12 18:22:38,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-12 18:22:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:22:38,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 18:22:38,075 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 172810976, now seen corresponding path program 1 times [2022-07-12 18:22:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324057889] [2022-07-12 18:22:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324057889] [2022-07-12 18:22:38,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324057889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:22:38,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141567087] [2022-07-12 18:22:38,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:22:38,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:22:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:38,150 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,200 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-07-12 18:22:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:22:38,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:22:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,201 INFO L225 Difference]: With dead ends: 54 [2022-07-12 18:22:38,201 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 18:22:38,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:38,202 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 18:22:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-12 18:22:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-12 18:22:38,203 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2022-07-12 18:22:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,204 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-12 18:22:38,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-12 18:22:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:22:38,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 18:22:38,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376192, now seen corresponding path program 1 times [2022-07-12 18:22:38,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124101740] [2022-07-12 18:22:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124101740] [2022-07-12 18:22:38,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124101740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:38,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200466721] [2022-07-12 18:22:38,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:38,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:38,230 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-07-12 18:22:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,259 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-12 18:22:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2022-07-12 18:22:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,260 INFO L225 Difference]: With dead ends: 53 [2022-07-12 18:22:38,260 INFO L226 Difference]: Without dead ends: 53 [2022-07-12 18:22:38,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:38,261 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-12 18:22:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-12 18:22:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 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) [2022-07-12 18:22:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-12 18:22:38,262 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-07-12 18:22:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,263 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-12 18:22:38,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-07-12 18:22:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-12 18:22:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:22:38,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 18:22:38,264 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376191, now seen corresponding path program 1 times [2022-07-12 18:22:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489956569] [2022-07-12 18:22:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489956569] [2022-07-12 18:22:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489956569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:22:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678590760] [2022-07-12 18:22:38,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:22:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:22:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:38,308 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-07-12 18:22:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,363 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-07-12 18:22:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:22:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2022-07-12 18:22:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,363 INFO L225 Difference]: With dead ends: 62 [2022-07-12 18:22:38,363 INFO L226 Difference]: Without dead ends: 62 [2022-07-12 18:22:38,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:22:38,364 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-12 18:22:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-07-12 18:22:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-12 18:22:38,366 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 16 [2022-07-12 18:22:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,366 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-12 18:22:38,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-07-12 18:22:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-12 18:22:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:22:38,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 18:22:38,367 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032946, now seen corresponding path program 1 times [2022-07-12 18:22:38,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254992391] [2022-07-12 18:22:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254992391] [2022-07-12 18:22:38,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254992391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:38,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191459127] [2022-07-12 18:22:38,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:38,391 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,420 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-12 18:22:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:38,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-07-12 18:22:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,420 INFO L225 Difference]: With dead ends: 53 [2022-07-12 18:22:38,420 INFO L226 Difference]: Without dead ends: 53 [2022-07-12 18:22:38,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:38,421 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-12 18:22:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-12 18:22:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.297872340425532) internal successors, (61), 52 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) [2022-07-12 18:22:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-12 18:22:38,423 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 18 [2022-07-12 18:22:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,423 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-12 18:22:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-12 18:22:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:22:38,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 18:22:38,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032945, now seen corresponding path program 1 times [2022-07-12 18:22:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498123438] [2022-07-12 18:22:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498123438] [2022-07-12 18:22:38,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498123438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:22:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272288399] [2022-07-12 18:22:38,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:22:38,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:22:38,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:38,498 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,583 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-07-12 18:22:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:22:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-07-12 18:22:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,584 INFO L225 Difference]: With dead ends: 62 [2022-07-12 18:22:38,584 INFO L226 Difference]: Without dead ends: 62 [2022-07-12 18:22:38,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:38,585 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 91 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-12 18:22:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-07-12 18:22:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 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) [2022-07-12 18:22:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-12 18:22:38,587 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 18 [2022-07-12 18:22:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,587 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-12 18:22:38,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-12 18:22:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:22:38,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 18:22:38,588 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2123984178, now seen corresponding path program 1 times [2022-07-12 18:22:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631181548] [2022-07-12 18:22:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631181548] [2022-07-12 18:22:38,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631181548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:22:38,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226408799] [2022-07-12 18:22:38,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:22:38,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:22:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:22:38,683 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,756 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-07-12 18:22:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:22:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-07-12 18:22:38,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,757 INFO L225 Difference]: With dead ends: 81 [2022-07-12 18:22:38,757 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 18:22:38,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:22:38,759 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 18:22:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-07-12 18:22:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 70 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) [2022-07-12 18:22:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-07-12 18:22:38,761 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2022-07-12 18:22:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,761 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-07-12 18:22:38,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-07-12 18:22:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:22:38,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 18:22:38,762 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1149914764, now seen corresponding path program 1 times [2022-07-12 18:22:38,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452326533] [2022-07-12 18:22:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452326533] [2022-07-12 18:22:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452326533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:22:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787053927] [2022-07-12 18:22:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:22:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:22:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:38,872 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,962 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2022-07-12 18:22:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:22:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-07-12 18:22:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,963 INFO L225 Difference]: With dead ends: 105 [2022-07-12 18:22:38,963 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:22:38,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:38,964 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 177 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:22:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2022-07-12 18:22:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 18:22:38,965 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2022-07-12 18:22:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,965 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 18:22:38,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 18:22:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:22:38,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 18:22:38,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1419000974, now seen corresponding path program 1 times [2022-07-12 18:22:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274961502] [2022-07-12 18:22:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274961502] [2022-07-12 18:22:39,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274961502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144985717] [2022-07-12 18:22:39,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:39,025 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:39,041 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-07-12 18:22:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 18:22:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:39,041 INFO L225 Difference]: With dead ends: 72 [2022-07-12 18:22:39,042 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 18:22:39,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:39,042 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:39,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 58 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 18:22:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-12 18:22:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-12 18:22:39,045 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 19 [2022-07-12 18:22:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:39,045 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-12 18:22:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-12 18:22:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 18:22:39,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:39,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 18:22:39,046 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash 453336425, now seen corresponding path program 1 times [2022-07-12 18:22:39,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554054208] [2022-07-12 18:22:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554054208] [2022-07-12 18:22:39,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554054208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521750518] [2022-07-12 18:22:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:39,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:39,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:39,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:22:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:22:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:22:39,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:22:39,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521750518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:39,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:39,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2022-07-12 18:22:39,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438739321] [2022-07-12 18:22:39,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:22:39,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:22:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:22:39,447 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:39,654 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-07-12 18:22:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:22:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-12 18:22:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:39,657 INFO L225 Difference]: With dead ends: 60 [2022-07-12 18:22:39,657 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:22:39,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:22:39,658 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 165 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:39,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 123 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:22:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-07-12 18:22:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-12 18:22:39,659 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 22 [2022-07-12 18:22:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:39,659 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-12 18:22:39,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-12 18:22:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:22:39,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:39,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:39,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:39,860 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1864607690, now seen corresponding path program 1 times [2022-07-12 18:22:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407919813] [2022-07-12 18:22:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:39,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407919813] [2022-07-12 18:22:39,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407919813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:22:39,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754489938] [2022-07-12 18:22:39,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:22:39,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:22:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:22:39,963 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:40,110 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-07-12 18:22:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:22:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-07-12 18:22:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:40,111 INFO L225 Difference]: With dead ends: 55 [2022-07-12 18:22:40,111 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 18:22:40,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:22:40,111 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:40,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 178 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 18:22:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-12 18:22:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 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) [2022-07-12 18:22:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-12 18:22:40,113 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 24 [2022-07-12 18:22:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:40,113 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-12 18:22:40,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-12 18:22:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:22:40,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:40,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:40,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 18:22:40,113 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2007657780, now seen corresponding path program 1 times [2022-07-12 18:22:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:40,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833843144] [2022-07-12 18:22:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:40,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:40,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833843144] [2022-07-12 18:22:40,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833843144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:40,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:40,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:22:40,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232369699] [2022-07-12 18:22:40,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:40,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:22:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:22:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:40,280 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:40,426 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-12 18:22:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:22:40,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-07-12 18:22:40,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:40,427 INFO L225 Difference]: With dead ends: 51 [2022-07-12 18:22:40,427 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 18:22:40,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:22:40,427 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:40,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 153 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 18:22:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-07-12 18:22:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-07-12 18:22:40,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2022-07-12 18:22:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:40,429 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-07-12 18:22:40,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-07-12 18:22:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:22:40,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:40,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:40,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 18:22:40,429 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2045741993, now seen corresponding path program 1 times [2022-07-12 18:22:40,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:40,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997921815] [2022-07-12 18:22:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:40,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:40,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997921815] [2022-07-12 18:22:40,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997921815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:40,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795793875] [2022-07-12 18:22:40,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:40,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:40,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:40,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:22:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:22:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:40,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:40,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:22:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:40,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795793875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:40,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:40,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-12 18:22:40,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150839409] [2022-07-12 18:22:40,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:40,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:22:40,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:22:40,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:22:40,747 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:41,003 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-07-12 18:22:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:22:41,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-12 18:22:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:41,004 INFO L225 Difference]: With dead ends: 45 [2022-07-12 18:22:41,004 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 18:22:41,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:22:41,005 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:41,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 176 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 18:22:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-07-12 18:22:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-12 18:22:41,006 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2022-07-12 18:22:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:41,006 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-12 18:22:41,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-12 18:22:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:22:41,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:41,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:41,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:41,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:41,207 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1136965878, now seen corresponding path program 1 times [2022-07-12 18:22:41,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:41,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535858456] [2022-07-12 18:22:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:41,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:41,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535858456] [2022-07-12 18:22:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535858456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195701461] [2022-07-12 18:22:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:41,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:41,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:41,240 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:41,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:22:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:22:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:41,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:22:41,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:22:41,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:41,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:41,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195701461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:41,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:41,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2022-07-12 18:22:41,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147233621] [2022-07-12 18:22:41,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:41,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:22:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:22:41,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:22:41,541 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:41,750 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-12 18:22:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:22:41,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 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 30 [2022-07-12 18:22:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:41,751 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:22:41,751 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 18:22:41,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:22:41,752 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:41,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 119 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 18:22:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-07-12 18:22:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-12 18:22:41,753 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2022-07-12 18:22:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:41,753 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-12 18:22:41,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-12 18:22:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:22:41,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:41,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:41,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:41,963 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,SelfDestructingSolverStorable25 [2022-07-12 18:22:41,963 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1702563688, now seen corresponding path program 1 times [2022-07-12 18:22:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792300910] [2022-07-12 18:22:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:42,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792300910] [2022-07-12 18:22:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792300910] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076728071] [2022-07-12 18:22:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:42,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:42,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:42,063 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:42,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:22:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:42,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:22:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:42,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:22:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:42,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076728071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:42,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:42,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-07-12 18:22:42,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122066571] [2022-07-12 18:22:42,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:22:42,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:42,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:22:42,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:22:42,335 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 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) [2022-07-12 18:22:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:42,568 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-07-12 18:22:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:22:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 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) Word has length 32 [2022-07-12 18:22:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:42,569 INFO L225 Difference]: With dead ends: 52 [2022-07-12 18:22:42,569 INFO L226 Difference]: Without dead ends: 49 [2022-07-12 18:22:42,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:22:42,570 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 160 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:42,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 176 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-12 18:22:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-07-12 18:22:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-12 18:22:42,571 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2022-07-12 18:22:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:42,572 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-12 18:22:42,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 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) [2022-07-12 18:22:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-12 18:22:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:22:42,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:42,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:42,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 18:22:42,788 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,SelfDestructingSolverStorable26 [2022-07-12 18:22:42,789 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1702514921, now seen corresponding path program 1 times [2022-07-12 18:22:42,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:42,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936462356] [2022-07-12 18:22:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:42,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:42,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936462356] [2022-07-12 18:22:42,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936462356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191172580] [2022-07-12 18:22:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:42,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:42,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:42,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:42,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:22:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:43,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 18:22:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:43,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:43,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-07-12 18:22:43,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 19 [2022-07-12 18:22:43,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:22:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:43,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:43,458 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int)) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23|)))) is different from false [2022-07-12 18:22:43,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:43,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 24 [2022-07-12 18:22:43,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:43,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 37 [2022-07-12 18:22:43,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:22:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:43,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191172580] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:43,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:43,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-07-12 18:22:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428893123] [2022-07-12 18:22:43,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:43,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:22:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:22:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=717, Unknown=1, NotChecked=54, Total=870 [2022-07-12 18:22:43,739 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 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) [2022-07-12 18:22:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:44,026 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-07-12 18:22:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:22:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 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) Word has length 32 [2022-07-12 18:22:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:44,027 INFO L225 Difference]: With dead ends: 69 [2022-07-12 18:22:44,027 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 18:22:44,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1287, Unknown=1, NotChecked=74, Total=1560 [2022-07-12 18:22:44,028 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:44,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 324 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 222 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2022-07-12 18:22:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 18:22:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-07-12 18:22:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-12 18:22:44,029 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2022-07-12 18:22:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:44,029 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-12 18:22:44,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 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) [2022-07-12 18:22:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-12 18:22:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:22:44,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:44,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:44,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:44,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:44,230 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash 956999220, now seen corresponding path program 2 times [2022-07-12 18:22:44,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:44,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430701259] [2022-07-12 18:22:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:44,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430701259] [2022-07-12 18:22:44,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430701259] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970253823] [2022-07-12 18:22:44,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:22:44,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:44,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:44,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:22:44,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:22:44,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 18:22:44,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:44,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:44,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:22:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:22:44,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970253823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:44,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:44,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-12 18:22:44,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391256624] [2022-07-12 18:22:44,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:44,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:22:44,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:44,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:22:44,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:22:44,604 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2022-07-12 18:22:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:44,803 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-07-12 18:22:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:22:44,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) Word has length 36 [2022-07-12 18:22:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:44,810 INFO L225 Difference]: With dead ends: 56 [2022-07-12 18:22:44,810 INFO L226 Difference]: Without dead ends: 56 [2022-07-12 18:22:44,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:22:44,818 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:44,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 138 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-12 18:22:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-07-12 18:22:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-07-12 18:22:44,820 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 36 [2022-07-12 18:22:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:44,820 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-07-12 18:22:44,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2022-07-12 18:22:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-07-12 18:22:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 18:22:44,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:44,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:44,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 18:22:45,032 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash 553249237, now seen corresponding path program 2 times [2022-07-12 18:22:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:45,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495100805] [2022-07-12 18:22:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495100805] [2022-07-12 18:22:45,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495100805] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602890058] [2022-07-12 18:22:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:22:45,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:45,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:45,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:22:45,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:22:45,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:45,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 18:22:45,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:45,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-07-12 18:22:45,692 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:22:45,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 10 [2022-07-12 18:22:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:45,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:45,928 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:45,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2022-07-12 18:22:45,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-12 18:22:45,955 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:45,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-07-12 18:22:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:46,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602890058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:46,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:46,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 15] total 40 [2022-07-12 18:22:46,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310006431] [2022-07-12 18:22:46,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:46,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 18:22:46,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 18:22:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:22:46,054 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:46,594 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-07-12 18:22:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:22:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-12 18:22:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:46,595 INFO L225 Difference]: With dead ends: 70 [2022-07-12 18:22:46,595 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:22:46,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=2673, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 18:22:46,596 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:46,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 292 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 326 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-07-12 18:22:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:22:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-12 18:22:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-07-12 18:22:46,597 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 38 [2022-07-12 18:22:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:46,598 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-07-12 18:22:46,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-07-12 18:22:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:22:46,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:46,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:46,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:46,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:46,807 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2039282674, now seen corresponding path program 3 times [2022-07-12 18:22:46,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:46,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47589973] [2022-07-12 18:22:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:46,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:46,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:46,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47589973] [2022-07-12 18:22:46,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47589973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:46,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588470659] [2022-07-12 18:22:46,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:22:46,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:46,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:46,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:46,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:22:46,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 18:22:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:46,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:22:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:47,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:47,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-12 18:22:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:47,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588470659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:47,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:47,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-07-12 18:22:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077517956] [2022-07-12 18:22:47,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:47,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 18:22:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 18:22:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:22:47,286 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:47,519 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-07-12 18:22:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:22:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 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 42 [2022-07-12 18:22:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:47,520 INFO L225 Difference]: With dead ends: 55 [2022-07-12 18:22:47,520 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:22:47,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:22:47,521 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:47,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 172 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:22:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-12 18:22:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-07-12 18:22:47,522 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 42 [2022-07-12 18:22:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:47,522 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-07-12 18:22:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-07-12 18:22:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:22:47,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:47,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:47,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-12 18:22:47,723 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1309731743, now seen corresponding path program 2 times [2022-07-12 18:22:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:47,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009339431] [2022-07-12 18:22:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:47,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:47,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009339431] [2022-07-12 18:22:47,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009339431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:47,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427725301] [2022-07-12 18:22:47,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:22:47,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:47,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:47,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:47,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:22:47,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:22:47,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:22:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 18:22:47,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:22:47,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427725301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:47,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:22:47,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2022-07-12 18:22:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395746287] [2022-07-12 18:22:47,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:47,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:47,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:22:47,968 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 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) [2022-07-12 18:22:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:47,999 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-07-12 18:22:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:22:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 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 46 [2022-07-12 18:22:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:47,999 INFO L225 Difference]: With dead ends: 53 [2022-07-12 18:22:47,999 INFO L226 Difference]: Without dead ends: 50 [2022-07-12 18:22:48,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:22:48,001 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:48,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 74 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-12 18:22:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-12 18:22:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-07-12 18:22:48,003 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2022-07-12 18:22:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:48,003 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-07-12 18:22:48,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 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) [2022-07-12 18:22:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-07-12 18:22:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:22:48,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:48,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:48,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:48,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-12 18:22:48,213 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:48,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1309682976, now seen corresponding path program 3 times [2022-07-12 18:22:48,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:48,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783570558] [2022-07-12 18:22:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:48,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:48,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783570558] [2022-07-12 18:22:48,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783570558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:48,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744496276] [2022-07-12 18:22:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:22:48,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:48,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:48,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:48,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:22:48,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:22:48,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:48,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 18:22:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:48,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-07-12 18:22:48,938 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-07-12 18:22:48,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-07-12 18:22:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:48,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:49,208 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:49,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2022-07-12 18:22:49,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-12 18:22:49,232 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:49,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-07-12 18:22:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:22:49,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744496276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:49,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:49,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 18] total 43 [2022-07-12 18:22:49,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249892317] [2022-07-12 18:22:49,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:49,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 18:22:49,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 18:22:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:22:49,389 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:50,123 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-07-12 18:22:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 18:22:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-12 18:22:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:50,124 INFO L225 Difference]: With dead ends: 141 [2022-07-12 18:22:50,124 INFO L226 Difference]: Without dead ends: 64 [2022-07-12 18:22:50,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=4050, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 18:22:50,125 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:50,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 375 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 436 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-07-12 18:22:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-12 18:22:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-07-12 18:22:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-07-12 18:22:50,126 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 46 [2022-07-12 18:22:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:50,126 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-07-12 18:22:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-07-12 18:22:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:22:50,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:50,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:50,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:50,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-12 18:22:50,343 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1724661286, now seen corresponding path program 4 times [2022-07-12 18:22:50,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:50,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405681964] [2022-07-12 18:22:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:50,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:22:50,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:50,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405681964] [2022-07-12 18:22:50,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405681964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:50,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511583495] [2022-07-12 18:22:50,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:22:50,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:50,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:50,440 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:50,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:22:50,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:22:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 18:22:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:50,530 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:50,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:50,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:50,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-12 18:22:50,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-07-12 18:22:50,978 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:50,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 22 [2022-07-12 18:22:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:22:51,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:51,455 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:51,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 24 [2022-07-12 18:22:51,462 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:51,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 37 [2022-07-12 18:22:51,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:22:51,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:22:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:22:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:22:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:22:51,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511583495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:51,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:51,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-07-12 18:22:51,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896372456] [2022-07-12 18:22:51,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:51,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:22:51,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:22:51,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1041, Unknown=8, NotChecked=0, Total=1190 [2022-07-12 18:22:51,773 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:52,181 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-12 18:22:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:22:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 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 54 [2022-07-12 18:22:52,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:52,182 INFO L225 Difference]: With dead ends: 60 [2022-07-12 18:22:52,182 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:22:52,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=2034, Unknown=8, NotChecked=0, Total=2352 [2022-07-12 18:22:52,183 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:52,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 293 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-07-12 18:22:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:22:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-07-12 18:22:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-07-12 18:22:52,184 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2022-07-12 18:22:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:52,184 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-07-12 18:22:52,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-07-12 18:22:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:22:52,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:52,185 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:52,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 18:22:52,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 18:22:52,395 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash 457880571, now seen corresponding path program 4 times [2022-07-12 18:22:52,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607510676] [2022-07-12 18:22:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:52,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:22:52,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:52,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607510676] [2022-07-12 18:22:52,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607510676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:52,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008896081] [2022-07-12 18:22:52,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:22:52,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:52,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:52,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:22:52,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:22:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:52,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-12 18:22:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:52,627 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:52,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:52,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-12 18:22:53,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:22:53,164 INFO L356 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2022-07-12 18:22:53,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 20 [2022-07-12 18:22:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:22:53,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:55,764 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:55,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2022-07-12 18:22:55,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-12 18:22:55,806 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:55,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-07-12 18:22:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:22:56,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008896081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:56,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:56,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 51 [2022-07-12 18:22:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966638197] [2022-07-12 18:22:56,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:56,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 18:22:56,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 18:22:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2370, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 18:22:56,344 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 52 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 52 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:57,802 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-07-12 18:22:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:22:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 52 states have internal predecessors, (136), 0 states have call successors, (0), 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 56 [2022-07-12 18:22:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:57,803 INFO L225 Difference]: With dead ends: 69 [2022-07-12 18:22:57,803 INFO L226 Difference]: Without dead ends: 69 [2022-07-12 18:22:57,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=966, Invalid=4436, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 18:22:57,804 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 303 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:57,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 319 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 702 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-07-12 18:22:57,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-12 18:22:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-12 18:22:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-12 18:22:57,806 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2022-07-12 18:22:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:57,806 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-12 18:22:57,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 52 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-12 18:22:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 18:22:57,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:57,807 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:57,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:58,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:58,012 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash 187500121, now seen corresponding path program 5 times [2022-07-12 18:22:58,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:58,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511952140] [2022-07-12 18:22:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:58,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:22:58,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511952140] [2022-07-12 18:22:58,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511952140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541060462] [2022-07-12 18:22:58,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:22:58,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:58,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:58,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:58,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:22:58,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 18:22:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:58,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 18:22:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:58,270 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:58,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:22:58,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:22:58,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541060462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:58,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:58,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-07-12 18:22:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085915218] [2022-07-12 18:22:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:22:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:22:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:22:58,789 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:59,159 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-07-12 18:22:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:22:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 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 68 [2022-07-12 18:22:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:59,160 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:22:59,160 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 18:22:59,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:22:59,161 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:59,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 158 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 18:22:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-07-12 18:22:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 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) [2022-07-12 18:22:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-12 18:22:59,162 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2022-07-12 18:22:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:59,163 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-12 18:22:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-12 18:22:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 18:22:59,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:59,163 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:59,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:59,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:59,375 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:22:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash 278636470, now seen corresponding path program 6 times [2022-07-12 18:22:59,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:59,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621493819] [2022-07-12 18:22:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:59,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 54 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:22:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621493819] [2022-07-12 18:22:59,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621493819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099026823] [2022-07-12 18:22:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:22:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:59,482 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:22:59,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:22:59,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-12 18:22:59,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 18:22:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:22:59,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:22:59,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:22:59,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:23:00,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099026823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:00,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:00,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-07-12 18:23:00,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897893873] [2022-07-12 18:23:00,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:00,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:23:00,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:23:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:23:00,077 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:00,409 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2022-07-12 18:23:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:23:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 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 72 [2022-07-12 18:23:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:00,410 INFO L225 Difference]: With dead ends: 179 [2022-07-12 18:23:00,410 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 18:23:00,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1813, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:23:00,411 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:00,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 234 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:23:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 18:23:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-12 18:23:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-07-12 18:23:00,413 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 72 [2022-07-12 18:23:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:00,413 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-07-12 18:23:00,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-07-12 18:23:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 18:23:00,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:00,414 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:00,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:00,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 18:23:00,633 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash -618201744, now seen corresponding path program 7 times [2022-07-12 18:23:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766053366] [2022-07-12 18:23:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:01,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:01,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766053366] [2022-07-12 18:23:01,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766053366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:01,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770763565] [2022-07-12 18:23:01,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:23:01,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:01,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:01,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:01,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:23:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 126 conjunts are in the unsatisfiable core [2022-07-12 18:23:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:01,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-07-12 18:23:01,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:23:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:23:01,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:02,135 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:02,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2022-07-12 18:23:02,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-12 18:23:02,161 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:02,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-07-12 18:23:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:23:02,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770763565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:02,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:02,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 58 [2022-07-12 18:23:02,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914121454] [2022-07-12 18:23:02,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-12 18:23:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-12 18:23:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 18:23:02,339 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 58 states, 58 states have (on average 2.8620689655172415) internal successors, (166), 58 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:03,631 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2022-07-12 18:23:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:23:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.8620689655172415) internal successors, (166), 58 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-12 18:23:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:03,632 INFO L225 Difference]: With dead ends: 124 [2022-07-12 18:23:03,632 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:23:03,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=468, Invalid=5694, Unknown=0, NotChecked=0, Total=6162 [2022-07-12 18:23:03,633 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 158 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:03,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 832 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1875 Invalid, 0 Unknown, 112 Unchecked, 0.6s Time] [2022-07-12 18:23:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:23:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2022-07-12 18:23:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-07-12 18:23:03,634 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2022-07-12 18:23:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:03,635 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-07-12 18:23:03,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.8620689655172415) internal successors, (166), 58 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-07-12 18:23:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 18:23:03,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:03,635 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:03,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 18:23:03,847 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash -704234675, now seen corresponding path program 8 times [2022-07-12 18:23:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:03,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382720526] [2022-07-12 18:23:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:03,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:23:04,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382720526] [2022-07-12 18:23:04,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382720526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443316876] [2022-07-12 18:23:04,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:23:04,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:04,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:04,056 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:04,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:23:04,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:23:04,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:23:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:23:04,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:04,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:23:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:23:04,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443316876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:04,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:04,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 18:23:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049905838] [2022-07-12 18:23:04,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:23:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:23:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:23:04,652 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 35 states, 34 states have (on average 4.029411764705882) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:05,333 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-07-12 18:23:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:23:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.029411764705882) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 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 84 [2022-07-12 18:23:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:05,334 INFO L225 Difference]: With dead ends: 92 [2022-07-12 18:23:05,334 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 18:23:05,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=2226, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 18:23:05,335 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 263 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:05,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 360 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:23:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 18:23:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-07-12 18:23:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-07-12 18:23:05,336 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 84 [2022-07-12 18:23:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:05,337 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-07-12 18:23:05,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.029411764705882) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-07-12 18:23:05,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 18:23:05,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:05,337 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:05,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-12 18:23:05,543 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash -915690852, now seen corresponding path program 9 times [2022-07-12 18:23:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059993463] [2022-07-12 18:23:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:23:05,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059993463] [2022-07-12 18:23:05,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059993463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:05,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539236613] [2022-07-12 18:23:05,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:23:05,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:05,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:05,694 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:05,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:23:05,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 18:23:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-12 18:23:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:23:05,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:23:05,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:23:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:23:06,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 87 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:23:06,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539236613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:06,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:06,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-07-12 18:23:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527999509] [2022-07-12 18:23:06,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 18:23:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 18:23:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:23:06,486 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:06,803 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2022-07-12 18:23:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:23:06,804 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-12 18:23:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:06,804 INFO L225 Difference]: With dead ends: 160 [2022-07-12 18:23:06,804 INFO L226 Difference]: Without dead ends: 98 [2022-07-12 18:23:06,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=637, Invalid=2015, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 18:23:06,805 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:06,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 226 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:23:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-12 18:23:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-07-12 18:23:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-07-12 18:23:06,806 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2022-07-12 18:23:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:06,807 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-07-12 18:23:06,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-07-12 18:23:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-12 18:23:06,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:06,807 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:06,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:07,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 18:23:07,008 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash -938077319, now seen corresponding path program 10 times [2022-07-12 18:23:07,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509126500] [2022-07-12 18:23:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:07,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:07,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509126500] [2022-07-12 18:23:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509126500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496259534] [2022-07-12 18:23:07,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:23:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:07,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:07,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:07,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:23:07,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:23:07,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-12 18:23:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:07,706 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:07,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:08,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:23:08,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:23:08,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:23:08,772 INFO L356 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2022-07-12 18:23:08,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-07-12 18:23:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 84 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:08,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:11,772 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:11,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 99 treesize of output 99 [2022-07-12 18:23:11,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-12 18:23:11,798 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:11,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2022-07-12 18:23:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:12,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496259534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:12,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:12,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 23, 28] total 76 [2022-07-12 18:23:12,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195988780] [2022-07-12 18:23:12,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:12,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-12 18:23:12,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-12 18:23:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5345, Unknown=1, NotChecked=0, Total=5700 [2022-07-12 18:23:12,526 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 76 states, 76 states have (on average 2.960526315789474) internal successors, (225), 76 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:14,261 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2022-07-12 18:23:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 18:23:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.960526315789474) internal successors, (225), 76 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-12 18:23:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:14,262 INFO L225 Difference]: With dead ends: 144 [2022-07-12 18:23:14,262 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:23:14,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=935, Invalid=12174, Unknown=1, NotChecked=0, Total=13110 [2022-07-12 18:23:14,263 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:14,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 938 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1205 Invalid, 0 Unknown, 336 Unchecked, 0.4s Time] [2022-07-12 18:23:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:23:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-07-12 18:23:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 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) [2022-07-12 18:23:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-07-12 18:23:14,265 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 94 [2022-07-12 18:23:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:14,265 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-07-12 18:23:14,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.960526315789474) internal successors, (225), 76 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-07-12 18:23:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-12 18:23:14,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:14,265 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:14,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:14,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-12 18:23:14,475 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1626450582, now seen corresponding path program 11 times [2022-07-12 18:23:14,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:14,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956323171] [2022-07-12 18:23:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:14,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:14,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956323171] [2022-07-12 18:23:14,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956323171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:14,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873004789] [2022-07-12 18:23:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:23:14,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:14,704 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:14,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:23:14,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 18:23:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:14,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 18:23:14,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:14,927 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:14,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:15,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:16,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873004789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:16,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:16,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-07-12 18:23:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107907267] [2022-07-12 18:23:16,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 18:23:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 18:23:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2455, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 18:23:16,157 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:17,064 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-07-12 18:23:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:23:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 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 98 [2022-07-12 18:23:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:17,065 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:23:17,065 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:23:17,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=989, Invalid=4413, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 18:23:17,066 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 369 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:17,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 411 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:23:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:23:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-07-12 18:23:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 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) [2022-07-12 18:23:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-07-12 18:23:17,067 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2022-07-12 18:23:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:17,067 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-07-12 18:23:17,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-07-12 18:23:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-12 18:23:17,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:17,068 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:17,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:17,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:17,284 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash 560906021, now seen corresponding path program 12 times [2022-07-12 18:23:17,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:17,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854130449] [2022-07-12 18:23:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:17,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 116 proven. 97 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:17,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854130449] [2022-07-12 18:23:17,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854130449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087925758] [2022-07-12 18:23:17,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:23:17,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:17,491 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:17,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:23:17,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-12 18:23:17,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-12 18:23:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:17,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:23:18,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-07-12 18:23:18,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 19 [2022-07-12 18:23:18,572 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-12 18:23:18,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 10 [2022-07-12 18:23:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:18,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:18,888 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1070 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1070) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-12 18:23:18,892 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:18,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 24 [2022-07-12 18:23:18,896 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:18,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 37 [2022-07-12 18:23:18,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:23:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:23:19,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087925758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:19,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:19,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 52 [2022-07-12 18:23:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857868146] [2022-07-12 18:23:19,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:19,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 18:23:19,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 18:23:19,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2381, Unknown=1, NotChecked=98, Total=2652 [2022-07-12 18:23:19,169 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 52 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:20,324 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2022-07-12 18:23:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 18:23:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 states have internal predecessors, (211), 0 states have call successors, (0), 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 104 [2022-07-12 18:23:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:20,325 INFO L225 Difference]: With dead ends: 183 [2022-07-12 18:23:20,325 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 18:23:20,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 9 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=457, Invalid=6351, Unknown=2, NotChecked=162, Total=6972 [2022-07-12 18:23:20,326 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 88 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:20,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 830 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1095 Invalid, 0 Unknown, 452 Unchecked, 0.3s Time] [2022-07-12 18:23:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 18:23:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-07-12 18:23:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-07-12 18:23:20,328 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2022-07-12 18:23:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:20,329 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-07-12 18:23:20,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-07-12 18:23:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 18:23:20,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:20,331 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:20,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:20,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:20,531 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -466755262, now seen corresponding path program 13 times [2022-07-12 18:23:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:20,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435575902] [2022-07-12 18:23:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:21,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:21,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435575902] [2022-07-12 18:23:21,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435575902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:21,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190242095] [2022-07-12 18:23:21,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:23:21,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:21,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:21,211 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:21,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:23:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 150 conjunts are in the unsatisfiable core [2022-07-12 18:23:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:21,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-07-12 18:23:21,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:23:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:23:21,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:24,662 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:24,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2022-07-12 18:23:24,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-12 18:23:24,694 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:24,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-07-12 18:23:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:23:25,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190242095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:25,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:25,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 25, 30] total 74 [2022-07-12 18:23:25,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942185290] [2022-07-12 18:23:25,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:25,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-12 18:23:25,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-12 18:23:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=5142, Unknown=1, NotChecked=0, Total=5402 [2022-07-12 18:23:25,039 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:27,385 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2022-07-12 18:23:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 18:23:27,385 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 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 108 [2022-07-12 18:23:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:27,386 INFO L225 Difference]: With dead ends: 164 [2022-07-12 18:23:27,386 INFO L226 Difference]: Without dead ends: 119 [2022-07-12 18:23:27,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=731, Invalid=9774, Unknown=1, NotChecked=0, Total=10506 [2022-07-12 18:23:27,387 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 333 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:27,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 1382 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3092 Invalid, 0 Unknown, 329 Unchecked, 1.1s Time] [2022-07-12 18:23:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-12 18:23:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-07-12 18:23:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-07-12 18:23:27,389 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 108 [2022-07-12 18:23:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:27,389 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-07-12 18:23:27,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-07-12 18:23:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 18:23:27,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:27,390 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:27,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:27,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:27,595 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1814519393, now seen corresponding path program 14 times [2022-07-12 18:23:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:27,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530570496] [2022-07-12 18:23:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:27,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:23:27,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530570496] [2022-07-12 18:23:27,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530570496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:27,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564432928] [2022-07-12 18:23:27,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:23:27,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:27,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:27,860 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:27,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:23:28,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:23:28,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-12 18:23:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:28,019 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:28,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:23:28,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 91 proven. 147 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:23:29,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564432928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:29,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:29,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2022-07-12 18:23:29,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116541946] [2022-07-12 18:23:29,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:29,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-12 18:23:29,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:29,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-12 18:23:29,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 18:23:29,370 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:30,066 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2022-07-12 18:23:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:23:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-12 18:23:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:30,067 INFO L225 Difference]: With dead ends: 120 [2022-07-12 18:23:30,067 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 18:23:30,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1090, Invalid=4916, Unknown=0, NotChecked=0, Total=6006 [2022-07-12 18:23:30,068 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 336 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:30,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 488 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:23:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 18:23:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-12 18:23:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-07-12 18:23:30,070 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2022-07-12 18:23:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:30,070 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-07-12 18:23:30,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-07-12 18:23:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-12 18:23:30,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:30,071 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:30,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:30,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:30,290 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-12 18:23:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash 253266798, now seen corresponding path program 15 times [2022-07-12 18:23:30,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:30,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136719463] [2022-07-12 18:23:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:30,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 156 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:23:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136719463] [2022-07-12 18:23:30,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136719463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758318419] [2022-07-12 18:23:30,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:23:30,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:30,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:30,485 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:30,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:23:30,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 18:23:30,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:30,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:23:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:30,997 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:30,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:31,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:23:31,310 INFO L356 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-07-12 18:23:31,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 36 [2022-07-12 18:23:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 28 proven. 31 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-07-12 18:23:31,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:36,152 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:36,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2022-07-12 18:23:36,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-12 18:23:36,177 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:36,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-07-12 18:23:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-12 18:23:36,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758318419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:36,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:36,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 12] total 42 [2022-07-12 18:23:36,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101304989] [2022-07-12 18:23:36,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:36,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 18:23:36,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 18:23:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1547, Unknown=2, NotChecked=0, Total=1722 [2022-07-12 18:23:36,517 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:39,089 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2022-07-12 18:23:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 18:23:39,089 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 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 118 [2022-07-12 18:23:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:39,089 INFO L225 Difference]: With dead ends: 207 [2022-07-12 18:23:39,089 INFO L226 Difference]: Without dead ends: 0 [2022-07-12 18:23:39,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2228, Invalid=10202, Unknown=2, NotChecked=0, Total=12432 [2022-07-12 18:23:39,090 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 95 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:39,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 164 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 676 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-07-12 18:23:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-12 18:23:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-12 18:23:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-12 18:23:39,091 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-07-12 18:23:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:39,091 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-12 18:23:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-12 18:23:39,091 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-12 18:23:39,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2022-07-12 18:23:39,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2022-07-12 18:23:39,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2022-07-12 18:23:39,095 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2022-07-12 18:23:39,095 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2022-07-12 18:23:39,095 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2022-07-12 18:23:39,095 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2022-07-12 18:23:39,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:39,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-12 18:23:39,301 INFO L356 BasicCegarLoop]: Path program histogram: [15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:39,303 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 18:23:39,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 06:23:39 BoogieIcfgContainer [2022-07-12 18:23:39,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 18:23:39,304 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 18:23:39,304 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 18:23:39,305 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 18:23:39,305 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:22:35" (3/4) ... [2022-07-12 18:23:39,306 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-12 18:23:39,313 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-12 18:23:39,313 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-12 18:23:39,313 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-12 18:23:39,313 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-12 18:23:39,341 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 18:23:39,341 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 18:23:39,342 INFO L158 Benchmark]: Toolchain (without parser) took 64847.52ms. Allocated memory was 86.0MB in the beginning and 255.9MB in the end (delta: 169.9MB). Free memory was 50.0MB in the beginning and 120.4MB in the end (delta: -70.4MB). Peak memory consumption was 97.7MB. Max. memory is 16.1GB. [2022-07-12 18:23:39,342 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 86.0MB. Free memory was 55.7MB in the beginning and 55.7MB in the end (delta: 28.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:23:39,342 INFO L158 Benchmark]: CACSL2BoogieTranslator took 303.78ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 49.8MB in the beginning and 90.2MB in the end (delta: -40.3MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2022-07-12 18:23:39,342 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.16ms. Allocated memory is still 121.6MB. Free memory was 90.2MB in the beginning and 88.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 18:23:39,342 INFO L158 Benchmark]: Boogie Preprocessor took 41.20ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 86.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:23:39,342 INFO L158 Benchmark]: RCFGBuilder took 299.49ms. Allocated memory is still 121.6MB. Free memory was 86.7MB in the beginning and 73.1MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 18:23:39,345 INFO L158 Benchmark]: TraceAbstraction took 64108.10ms. Allocated memory was 121.6MB in the beginning and 255.9MB in the end (delta: 134.2MB). Free memory was 72.8MB in the beginning and 123.2MB in the end (delta: -50.5MB). Peak memory consumption was 85.6MB. Max. memory is 16.1GB. [2022-07-12 18:23:39,349 INFO L158 Benchmark]: Witness Printer took 37.13ms. Allocated memory is still 255.9MB. Free memory was 123.2MB in the beginning and 120.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 18:23:39,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 86.0MB. Free memory was 55.7MB in the beginning and 55.7MB in the end (delta: 28.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 303.78ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 49.8MB in the beginning and 90.2MB in the end (delta: -40.3MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.16ms. Allocated memory is still 121.6MB. Free memory was 90.2MB in the beginning and 88.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.20ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 86.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 299.49ms. Allocated memory is still 121.6MB. Free memory was 86.7MB in the beginning and 73.1MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 64108.10ms. Allocated memory was 121.6MB in the beginning and 255.9MB in the end (delta: 134.2MB). Free memory was 72.8MB in the beginning and 123.2MB in the end (delta: -50.5MB). Peak memory consumption was 85.6MB. Max. memory is 16.1GB. * Witness Printer took 37.13ms. Allocated memory is still 255.9MB. Free memory was 123.2MB in the beginning and 120.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 64.1s, OverallIterations: 46, TraceHistogramMax: 9, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 18.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5489 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5489 mSDsluCounter, 10803 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1768 IncrementalHoareTripleChecker+Unchecked, 9615 mSDsCounter, 921 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16293 IncrementalHoareTripleChecker+Invalid, 18982 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 921 mSolverCounterUnsat, 1188 mSDtfsCounter, 16293 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3945 GetRequests, 2486 SyntacticMatches, 34 SemanticMatches, 1425 ConstructedPredicates, 2 IntricatePredicates, 9 DeprecatedPredicates, 20022 ImplicationChecksByTransitivity, 36.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=45, InterpolantAutomatonStates: 696, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 46 MinimizatonAttempts, 437 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 35.8s InterpolantComputationTime, 3318 NumberOfCodeBlocks, 3264 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 4691 ConstructedInterpolants, 237 QuantifiedInterpolants, 52145 SizeOfPredicates, 527 NumberOfNonLiveVariables, 7770 ConjunctsInSsa, 1489 ConjunctsInUnsatCore, 95 InterpolantComputations, 22 PerfectInterpolantSequences, 4102/8198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-12 18:23:39,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE