./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/ldv-memsafety/memleaks_test23_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 03499c01c9320e6c56c78c984f54a0b0b3f62caee089ccaa631f137e86019454 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:28:14,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:28:14,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:28:14,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:28:14,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:28:14,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:28:14,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:28:14,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:28:14,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:28:14,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:28:14,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:28:14,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:28:14,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:28:14,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:28:14,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:28:14,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:28:14,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:28:14,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:28:14,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:28:14,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:28:14,687 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:28:14,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:28:14,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:28:14,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:28:14,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:28:14,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:28:14,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:28:14,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:28:14,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:28:14,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:28:14,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:28:14,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:28:14,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:28:14,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:28:14,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:28:14,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:28:14,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:28:14,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:28:14,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:28:14,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:28:14,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:28:14,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:28:14,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:28:14,753 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:28:14,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:28:14,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:28:14,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:28:14,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:28:14,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:28:14,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:28:14,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:28:14,756 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:28:14,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:28:14,757 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:28:14,757 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:28:14,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:28:14,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:28:14,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:28:14,758 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:28:14,758 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:28:14,758 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:28:14,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:28:14,758 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:28:14,758 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:28:14,759 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:28:14,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:28:14,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:28:14,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:28:14,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:28:14,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:28:14,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:28:14,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:28:14,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:28:14,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03499c01c9320e6c56c78c984f54a0b0b3f62caee089ccaa631f137e86019454 [2022-07-21 17:28:15,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:28:15,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:28:15,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:28:15,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:28:15,065 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:28:15,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-21 17:28:15,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42009d24/03e788a97cfa48f5b673853d5b6fc8c3/FLAG84733855e [2022-07-21 17:28:15,497 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:28:15,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-21 17:28:15,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42009d24/03e788a97cfa48f5b673853d5b6fc8c3/FLAG84733855e [2022-07-21 17:28:15,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42009d24/03e788a97cfa48f5b673853d5b6fc8c3 [2022-07-21 17:28:15,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:28:15,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:28:15,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:28:15,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:28:15,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:28:15,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:28:15" (1/1) ... [2022-07-21 17:28:15,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6099efae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:15, skipping insertion in model container [2022-07-21 17:28:15,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:28:15" (1/1) ... [2022-07-21 17:28:15,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:28:15,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:28:16,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:28:16,003 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.IllegalArgumentException: This array type is incomplete! Cannot extract actual dimensions. at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CTranslationUtil.getConstantFirstDimensionOfArray(CTranslationUtil.java:210) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.InitializationHandler.constructIndexToInitInfo(InitializationHandler.java:1272) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.InitializationHandler.constructInitializerInfo(InitializationHandler.java:1228) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.InitializationHandler.initialize(InitializationHandler.java:236) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.InitializationHandler.initialize(InitializationHandler.java:207) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.PostProcessor.createUltimateInitProcedure(PostProcessor.java:806) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.PostProcessor.postProcess(PostProcessor.java:212) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:628) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-21 17:28:16,009 INFO L158 Benchmark]: Toolchain (without parser) took 474.43ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 35.3MB in the beginning and 46.9MB in the end (delta: -11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 17:28:16,010 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 32.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:28:16,011 INFO L158 Benchmark]: CACSL2BoogieTranslator took 471.99ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 35.2MB in the beginning and 46.9MB in the end (delta: -11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 17:28:16,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 32.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 471.99ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 35.2MB in the beginning and 46.9MB in the end (delta: -11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: IllegalArgumentException: This array type is incomplete! Cannot extract actual dimensions. de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: IllegalArgumentException: This array type is incomplete! Cannot extract actual dimensions.: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CTranslationUtil.getConstantFirstDimensionOfArray(CTranslationUtil.java:210) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/ldv-memsafety/memleaks_test23_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 03499c01c9320e6c56c78c984f54a0b0b3f62caee089ccaa631f137e86019454 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:28:17,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:28:17,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:28:17,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:28:17,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:28:17,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:28:17,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:28:17,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:28:17,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:28:17,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:28:17,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:28:17,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:28:17,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:28:17,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:28:17,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:28:17,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:28:17,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:28:17,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:28:17,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:28:17,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:28:17,870 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:28:17,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:28:17,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:28:17,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:28:17,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:28:17,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:28:17,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:28:17,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:28:17,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:28:17,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:28:17,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:28:17,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:28:17,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:28:17,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:28:17,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:28:17,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:28:17,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:28:17,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:28:17,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:28:17,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:28:17,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:28:17,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:28:17,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:28:17,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:28:17,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:28:17,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:28:17,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:28:17,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:28:17,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:28:17,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:28:17,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:28:17,929 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:28:17,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:28:17,930 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:28:17,930 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:28:17,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:28:17,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:28:17,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:28:17,937 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:28:17,937 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:28:17,937 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:28:17,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:28:17,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:28:17,938 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:28:17,938 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:28:17,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:28:17,938 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:28:17,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:28:17,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:28:17,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:28:17,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:28:17,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:28:17,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:28:17,940 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:28:17,940 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:28:17,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:28:17,940 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03499c01c9320e6c56c78c984f54a0b0b3f62caee089ccaa631f137e86019454 [2022-07-21 17:28:18,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:28:18,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:28:18,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:28:18,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:28:18,280 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:28:18,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-21 17:28:18,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811482d9c/7bd8e330f61842f2a91f25835a0a340f/FLAG1acee92d2 [2022-07-21 17:28:18,761 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:28:18,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-21 17:28:18,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811482d9c/7bd8e330f61842f2a91f25835a0a340f/FLAG1acee92d2 [2022-07-21 17:28:18,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811482d9c/7bd8e330f61842f2a91f25835a0a340f [2022-07-21 17:28:18,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:28:18,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:28:18,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:28:18,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:28:18,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:28:18,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:28:18" (1/1) ... [2022-07-21 17:28:18,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb374ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:18, skipping insertion in model container [2022-07-21 17:28:18,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:28:18" (1/1) ... [2022-07-21 17:28:18,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:28:18,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:28:19,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:28:19,234 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 17:28:19,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:28:19,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:28:19,302 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:28:19,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:28:19,402 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:28:19,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19 WrapperNode [2022-07-21 17:28:19,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:28:19,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:28:19,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:28:19,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:28:19,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,448 INFO L137 Inliner]: procedures = 175, calls = 119, calls flagged for inlining = 30, calls inlined = 15, statements flattened = 198 [2022-07-21 17:28:19,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:28:19,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:28:19,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:28:19,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:28:19,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:28:19,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:28:19,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:28:19,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:28:19,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (1/1) ... [2022-07-21 17:28:19,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:28:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:28:19,508 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) [2022-07-21 17:28:19,511 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 [2022-07-21 17:28:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 17:28:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-07-21 17:28:19,537 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-07-21 17:28:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-21 17:28:19,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-21 17:28:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 17:28:19,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 17:28:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:28:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:28:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure free_reports [2022-07-21 17:28:19,539 INFO L138 BoogieDeclarations]: Found implementation of procedure free_reports [2022-07-21 17:28:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:28:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:28:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:28:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 17:28:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:28:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:28:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-07-21 17:28:19,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-07-21 17:28:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-21 17:28:19,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-21 17:28:19,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:28:19,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:28:19,736 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:28:19,738 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:28:20,197 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:28:20,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:28:20,209 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:28:20,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:28:20 BoogieIcfgContainer [2022-07-21 17:28:20,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:28:20,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:28:20,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:28:20,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:28:20,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:28:18" (1/3) ... [2022-07-21 17:28:20,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d79e69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:28:20, skipping insertion in model container [2022-07-21 17:28:20,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:28:19" (2/3) ... [2022-07-21 17:28:20,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d79e69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:28:20, skipping insertion in model container [2022-07-21 17:28:20,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:28:20" (3/3) ... [2022-07-21 17:28:20,223 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test23_1.i [2022-07-21 17:28:20,233 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:28:20,233 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 79 error locations. [2022-07-21 17:28:20,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:28:20,278 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@d1d6250, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@307f62f3 [2022-07-21 17:28:20,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2022-07-21 17:28:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 111 states have (on average 1.8468468468468469) internal successors, (205), 190 states have internal predecessors, (205), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:28:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:28:20,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:20,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:20,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 441980658, now seen corresponding path program 1 times [2022-07-21 17:28:20,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:20,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621274660] [2022-07-21 17:28:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:20,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:20,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:20,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:20,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:28:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:20,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:28:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:20,459 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:20,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:20,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621274660] [2022-07-21 17:28:20,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621274660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:20,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:20,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:28:20,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942178799] [2022-07-21 17:28:20,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:20,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:28:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:20,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:28:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:20,537 INFO L87 Difference]: Start difference. First operand has 205 states, 111 states have (on average 1.8468468468468469) internal successors, (205), 190 states have internal predecessors, (205), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:21,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:21,055 INFO L93 Difference]: Finished difference Result 232 states and 249 transitions. [2022-07-21 17:28:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:28:21,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-21 17:28:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:21,064 INFO L225 Difference]: With dead ends: 232 [2022-07-21 17:28:21,065 INFO L226 Difference]: Without dead ends: 228 [2022-07-21 17:28:21,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:28:21,068 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 28 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:21,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 851 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:28:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-21 17:28:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2022-07-21 17:28:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 117 states have (on average 1.794871794871795) internal successors, (210), 195 states have internal predecessors, (210), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-21 17:28:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 229 transitions. [2022-07-21 17:28:21,112 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 229 transitions. Word has length 12 [2022-07-21 17:28:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:21,113 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 229 transitions. [2022-07-21 17:28:21,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 229 transitions. [2022-07-21 17:28:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:28:21,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:21,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:21,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:21,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:21,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 441980659, now seen corresponding path program 1 times [2022-07-21 17:28:21,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130451497] [2022-07-21 17:28:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:21,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:21,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:21,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:28:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:28:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:21,396 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:21,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:21,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:21,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130451497] [2022-07-21 17:28:21,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130451497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:21,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:21,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:28:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438396430] [2022-07-21 17:28:21,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:21,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:28:21,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:21,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:28:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:28:21,493 INFO L87 Difference]: Start difference. First operand 212 states and 229 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:22,047 INFO L93 Difference]: Finished difference Result 237 states and 253 transitions. [2022-07-21 17:28:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:28:22,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-21 17:28:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:22,049 INFO L225 Difference]: With dead ends: 237 [2022-07-21 17:28:22,049 INFO L226 Difference]: Without dead ends: 237 [2022-07-21 17:28:22,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:28:22,050 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 35 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:22,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1102 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:28:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-21 17:28:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 212. [2022-07-21 17:28:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 117 states have (on average 1.7777777777777777) internal successors, (208), 195 states have internal predecessors, (208), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-21 17:28:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 227 transitions. [2022-07-21 17:28:22,059 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 227 transitions. Word has length 12 [2022-07-21 17:28:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:22,059 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 227 transitions. [2022-07-21 17:28:22,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 227 transitions. [2022-07-21 17:28:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:28:22,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:22,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:22,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:22,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2110176303, now seen corresponding path program 1 times [2022-07-21 17:28:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:22,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921568851] [2022-07-21 17:28:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:22,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:22,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:22,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:28:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:28:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:22,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:22,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921568851] [2022-07-21 17:28:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921568851] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:22,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:22,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:28:22,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083850164] [2022-07-21 17:28:22,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:22,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:28:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:28:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:22,365 INFO L87 Difference]: Start difference. First operand 212 states and 227 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:22,390 INFO L93 Difference]: Finished difference Result 224 states and 239 transitions. [2022-07-21 17:28:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:28:22,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-21 17:28:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:22,391 INFO L225 Difference]: With dead ends: 224 [2022-07-21 17:28:22,391 INFO L226 Difference]: Without dead ends: 224 [2022-07-21 17:28:22,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:22,392 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 20 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:22,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 844 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:28:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-21 17:28:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 203. [2022-07-21 17:28:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 113 states have (on average 1.7699115044247788) internal successors, (200), 187 states have internal predecessors, (200), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 17:28:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 217 transitions. [2022-07-21 17:28:22,399 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 217 transitions. Word has length 12 [2022-07-21 17:28:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:22,400 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 217 transitions. [2022-07-21 17:28:22,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 217 transitions. [2022-07-21 17:28:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:28:22,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:22,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:22,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:22,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:22,608 INFO L85 PathProgramCache]: Analyzing trace with hash 441895411, now seen corresponding path program 1 times [2022-07-21 17:28:22,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:22,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949910561] [2022-07-21 17:28:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:22,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:22,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:22,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:28:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:22,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:28:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:22,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:22,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949910561] [2022-07-21 17:28:22,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949910561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:22,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:22,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:28:22,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997202361] [2022-07-21 17:28:22,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:22,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:28:22,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:28:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:22,711 INFO L87 Difference]: Start difference. First operand 203 states and 217 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:22,736 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2022-07-21 17:28:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:28:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-21 17:28:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:22,738 INFO L225 Difference]: With dead ends: 224 [2022-07-21 17:28:22,738 INFO L226 Difference]: Without dead ends: 224 [2022-07-21 17:28:22,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:22,739 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 129 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:22,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 774 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:28:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-21 17:28:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 203. [2022-07-21 17:28:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 113 states have (on average 1.761061946902655) internal successors, (199), 187 states have internal predecessors, (199), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 17:28:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 216 transitions. [2022-07-21 17:28:22,745 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 216 transitions. Word has length 12 [2022-07-21 17:28:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:22,745 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 216 transitions. [2022-07-21 17:28:22,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 216 transitions. [2022-07-21 17:28:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:28:22,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:22,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:22,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:22,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2110261550, now seen corresponding path program 1 times [2022-07-21 17:28:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191876532] [2022-07-21 17:28:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:22,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:22,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:22,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:28:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:23,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:28:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:23,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:23,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191876532] [2022-07-21 17:28:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191876532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:23,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:23,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:28:23,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189299535] [2022-07-21 17:28:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:28:23,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:28:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:23,051 INFO L87 Difference]: Start difference. First operand 203 states and 216 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:23,077 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2022-07-21 17:28:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:28:23,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-21 17:28:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:23,079 INFO L225 Difference]: With dead ends: 208 [2022-07-21 17:28:23,079 INFO L226 Difference]: Without dead ends: 208 [2022-07-21 17:28:23,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:23,080 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 112 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:23,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 726 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:28:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-21 17:28:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2022-07-21 17:28:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 115 states have (on average 1.7478260869565216) internal successors, (201), 189 states have internal predecessors, (201), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 17:28:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 218 transitions. [2022-07-21 17:28:23,085 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 218 transitions. Word has length 12 [2022-07-21 17:28:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:23,085 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 218 transitions. [2022-07-21 17:28:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 218 transitions. [2022-07-21 17:28:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:28:23,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:23,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:23,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-21 17:28:23,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:23,293 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -993578524, now seen corresponding path program 1 times [2022-07-21 17:28:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:23,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613542613] [2022-07-21 17:28:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:23,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:23,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:28:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:28:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:23,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:23,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613542613] [2022-07-21 17:28:23,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613542613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:23,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:23,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:28:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888924918] [2022-07-21 17:28:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:23,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:28:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:28:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:28:23,366 INFO L87 Difference]: Start difference. First operand 205 states and 218 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:23,617 INFO L93 Difference]: Finished difference Result 217 states and 232 transitions. [2022-07-21 17:28:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:28:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-21 17:28:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:23,618 INFO L225 Difference]: With dead ends: 217 [2022-07-21 17:28:23,619 INFO L226 Difference]: Without dead ends: 209 [2022-07-21 17:28:23,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:28:23,619 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 51 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:23,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 402 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:28:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-21 17:28:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2022-07-21 17:28:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 110 states have (on average 1.7727272727272727) internal successors, (195), 184 states have internal predecessors, (195), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:28:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 211 transitions. [2022-07-21 17:28:23,623 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 211 transitions. Word has length 13 [2022-07-21 17:28:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:23,623 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 211 transitions. [2022-07-21 17:28:23,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:28:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 211 transitions. [2022-07-21 17:28:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:28:23,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:23,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:23,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:23,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1907571031, now seen corresponding path program 1 times [2022-07-21 17:28:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126158672] [2022-07-21 17:28:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:23,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:23,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:23,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:23,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:28:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:28:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:26,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:26,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:26,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126158672] [2022-07-21 17:28:26,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126158672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:26,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:26,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:28:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543271008] [2022-07-21 17:28:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:26,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:28:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:28:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-07-21 17:28:26,107 INFO L87 Difference]: Start difference. First operand 199 states and 211 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:28:28,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:28,588 INFO L93 Difference]: Finished difference Result 209 states and 224 transitions. [2022-07-21 17:28:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:28:28,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-07-21 17:28:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:28,590 INFO L225 Difference]: With dead ends: 209 [2022-07-21 17:28:28,590 INFO L226 Difference]: Without dead ends: 209 [2022-07-21 17:28:28,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=38, Invalid=92, Unknown=2, NotChecked=0, Total=132 [2022-07-21 17:28:28,590 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 62 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:28,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 446 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 250 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2022-07-21 17:28:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-21 17:28:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2022-07-21 17:28:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 110 states have (on average 1.7636363636363637) internal successors, (194), 183 states have internal predecessors, (194), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:28:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 210 transitions. [2022-07-21 17:28:28,595 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 210 transitions. Word has length 16 [2022-07-21 17:28:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:28,596 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 210 transitions. [2022-07-21 17:28:28,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:28:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 210 transitions. [2022-07-21 17:28:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:28:28,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:28,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:28,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:28,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:28,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1907571030, now seen corresponding path program 1 times [2022-07-21 17:28:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:28,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193614247] [2022-07-21 17:28:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:28,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:28,825 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:28,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:28:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:28:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:28,986 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:28:28,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-21 17:28:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:29,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:29,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193614247] [2022-07-21 17:28:29,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193614247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:29,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:29,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:28:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207990442] [2022-07-21 17:28:29,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:29,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:28:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:28:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:29,027 INFO L87 Difference]: Start difference. First operand 198 states and 210 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:28:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:29,513 INFO L93 Difference]: Finished difference Result 250 states and 265 transitions. [2022-07-21 17:28:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:28:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-07-21 17:28:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:29,514 INFO L225 Difference]: With dead ends: 250 [2022-07-21 17:28:29,515 INFO L226 Difference]: Without dead ends: 250 [2022-07-21 17:28:29,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:28:29,515 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 198 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 581 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 408 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2022-07-21 17:28:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-21 17:28:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 208. [2022-07-21 17:28:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 119 states have (on average 1.7478991596638656) internal successors, (208), 192 states have internal predecessors, (208), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 17:28:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 226 transitions. [2022-07-21 17:28:29,519 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 226 transitions. Word has length 16 [2022-07-21 17:28:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:29,519 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 226 transitions. [2022-07-21 17:28:29,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:28:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 226 transitions. [2022-07-21 17:28:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:28:29,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:29,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:29,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:29,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:29,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1544157348, now seen corresponding path program 1 times [2022-07-21 17:28:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:29,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635563295] [2022-07-21 17:28:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:29,731 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:29,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:28:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:29,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:28:29,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:29,851 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:29,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:29,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:29,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635563295] [2022-07-21 17:28:29,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635563295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:29,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:29,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:28:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427388010] [2022-07-21 17:28:29,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:29,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:28:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:28:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:28:29,875 INFO L87 Difference]: Start difference. First operand 208 states and 226 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:30,298 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2022-07-21 17:28:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:28:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-07-21 17:28:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:30,300 INFO L225 Difference]: With dead ends: 264 [2022-07-21 17:28:30,300 INFO L226 Difference]: Without dead ends: 264 [2022-07-21 17:28:30,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:30,301 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 71 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:30,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 653 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:28:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-21 17:28:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 236. [2022-07-21 17:28:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 220 states have internal predecessors, (264), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 17:28:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 282 transitions. [2022-07-21 17:28:30,305 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 282 transitions. Word has length 25 [2022-07-21 17:28:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:30,306 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 282 transitions. [2022-07-21 17:28:30,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 282 transitions. [2022-07-21 17:28:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:28:30,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:30,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:30,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:30,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1544157349, now seen corresponding path program 1 times [2022-07-21 17:28:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015964914] [2022-07-21 17:28:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:30,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:30,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:30,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:28:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:30,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:28:30,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:30,650 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:30,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:30,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015964914] [2022-07-21 17:28:30,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015964914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:30,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:30,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:28:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663434804] [2022-07-21 17:28:30,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:30,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:28:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:28:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:28:30,709 INFO L87 Difference]: Start difference. First operand 236 states and 282 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:31,378 INFO L93 Difference]: Finished difference Result 296 states and 325 transitions. [2022-07-21 17:28:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:28:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-07-21 17:28:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:31,380 INFO L225 Difference]: With dead ends: 296 [2022-07-21 17:28:31,380 INFO L226 Difference]: Without dead ends: 296 [2022-07-21 17:28:31,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:31,380 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 105 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:31,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 651 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:28:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-21 17:28:31,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 238. [2022-07-21 17:28:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 152 states have (on average 1.75) internal successors, (266), 221 states have internal predecessors, (266), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 287 transitions. [2022-07-21 17:28:31,385 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 287 transitions. Word has length 25 [2022-07-21 17:28:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:31,385 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 287 transitions. [2022-07-21 17:28:31,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 287 transitions. [2022-07-21 17:28:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 17:28:31,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:31,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:31,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-07-21 17:28:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:31,587 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2123399988, now seen corresponding path program 1 times [2022-07-21 17:28:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:31,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220764088] [2022-07-21 17:28:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:31,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:31,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:31,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:28:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:31,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:28:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:31,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:31,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:31,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220764088] [2022-07-21 17:28:31,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220764088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:31,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:31,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:28:31,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384050747] [2022-07-21 17:28:31,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:31,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:28:31,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:31,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:28:31,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:28:31,707 INFO L87 Difference]: Start difference. First operand 238 states and 287 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:31,778 INFO L93 Difference]: Finished difference Result 238 states and 286 transitions. [2022-07-21 17:28:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:28:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-21 17:28:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:31,780 INFO L225 Difference]: With dead ends: 238 [2022-07-21 17:28:31,780 INFO L226 Difference]: Without dead ends: 238 [2022-07-21 17:28:31,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:31,781 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 120 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:31,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 832 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:28:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-21 17:28:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-07-21 17:28:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 152 states have (on average 1.743421052631579) internal successors, (265), 221 states have internal predecessors, (265), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 286 transitions. [2022-07-21 17:28:31,785 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 286 transitions. Word has length 27 [2022-07-21 17:28:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:31,785 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 286 transitions. [2022-07-21 17:28:31,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 286 transitions. [2022-07-21 17:28:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 17:28:31,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:31,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:31,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-21 17:28:32,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:32,000 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash -308565232, now seen corresponding path program 1 times [2022-07-21 17:28:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:32,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206572198] [2022-07-21 17:28:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:32,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:32,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:32,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:32,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:28:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:32,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:28:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:32,137 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:32,178 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:28:32,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:28:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:32,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:32,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:32,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206572198] [2022-07-21 17:28:32,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206572198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:32,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:32,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:28:32,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298183868] [2022-07-21 17:28:32,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:32,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:28:32,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:28:32,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:28:32,223 INFO L87 Difference]: Start difference. First operand 238 states and 286 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:28:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:32,824 INFO L93 Difference]: Finished difference Result 250 states and 294 transitions. [2022-07-21 17:28:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:28:32,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-07-21 17:28:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:32,826 INFO L225 Difference]: With dead ends: 250 [2022-07-21 17:28:32,826 INFO L226 Difference]: Without dead ends: 250 [2022-07-21 17:28:32,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:28:32,826 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 201 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:32,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 552 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:28:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-21 17:28:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2022-07-21 17:28:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 152 states have (on average 1.6776315789473684) internal successors, (255), 216 states have internal predecessors, (255), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 276 transitions. [2022-07-21 17:28:32,831 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 276 transitions. Word has length 33 [2022-07-21 17:28:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:32,832 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 276 transitions. [2022-07-21 17:28:32,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:28:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 276 transitions. [2022-07-21 17:28:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 17:28:32,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:32,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:32,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:33,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:33,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:33,041 INFO L85 PathProgramCache]: Analyzing trace with hash -308565231, now seen corresponding path program 1 times [2022-07-21 17:28:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:33,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103891105] [2022-07-21 17:28:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:33,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:33,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:33,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:33,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 17:28:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:28:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:33,181 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:33,187 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:33,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:33,258 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:33,259 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 11 treesize of output 11 [2022-07-21 17:28:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:33,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:33,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103891105] [2022-07-21 17:28:33,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103891105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:33,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:33,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:28:33,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346438749] [2022-07-21 17:28:33,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:33,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:28:33,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:28:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:33,328 INFO L87 Difference]: Start difference. First operand 233 states and 276 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:28:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:34,101 INFO L93 Difference]: Finished difference Result 310 states and 341 transitions. [2022-07-21 17:28:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:28:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-07-21 17:28:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:34,104 INFO L225 Difference]: With dead ends: 310 [2022-07-21 17:28:34,104 INFO L226 Difference]: Without dead ends: 310 [2022-07-21 17:28:34,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:28:34,104 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 212 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:34,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 559 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 502 Invalid, 0 Unknown, 135 Unchecked, 0.7s Time] [2022-07-21 17:28:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-07-21 17:28:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 233. [2022-07-21 17:28:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 152 states have (on average 1.644736842105263) internal successors, (250), 216 states have internal predecessors, (250), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 271 transitions. [2022-07-21 17:28:34,109 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 271 transitions. Word has length 33 [2022-07-21 17:28:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:34,110 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 271 transitions. [2022-07-21 17:28:34,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:28:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 271 transitions. [2022-07-21 17:28:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:28:34,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:34,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:34,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:34,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:34,319 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1238063083, now seen corresponding path program 1 times [2022-07-21 17:28:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:34,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225884829] [2022-07-21 17:28:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:34,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:34,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:34,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:34,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:28:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:28:34,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:34,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:34,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:34,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225884829] [2022-07-21 17:28:34,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225884829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:34,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:34,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:28:34,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400712128] [2022-07-21 17:28:34,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:34,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:28:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:28:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:28:34,777 INFO L87 Difference]: Start difference. First operand 233 states and 271 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:28:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:34,800 INFO L93 Difference]: Finished difference Result 317 states and 359 transitions. [2022-07-21 17:28:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:28:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-21 17:28:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:34,801 INFO L225 Difference]: With dead ends: 317 [2022-07-21 17:28:34,802 INFO L226 Difference]: Without dead ends: 317 [2022-07-21 17:28:34,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:28:34,802 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 118 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:34,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 1224 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 152 Unchecked, 0.0s Time] [2022-07-21 17:28:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-21 17:28:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 250. [2022-07-21 17:28:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 168 states have (on average 1.5952380952380953) internal successors, (268), 232 states have internal predecessors, (268), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 289 transitions. [2022-07-21 17:28:34,807 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 289 transitions. Word has length 36 [2022-07-21 17:28:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:34,807 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 289 transitions. [2022-07-21 17:28:34,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:28:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 289 transitions. [2022-07-21 17:28:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:28:34,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:34,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:34,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-21 17:28:35,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:35,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONARRAY_INDEX === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1238063271, now seen corresponding path program 1 times [2022-07-21 17:28:35,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:35,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132597736] [2022-07-21 17:28:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:35,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:35,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:35,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:35,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 17:28:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:28:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:35,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:35,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:35,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132597736] [2022-07-21 17:28:35,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132597736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:35,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:35,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:28:35,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84051234] [2022-07-21 17:28:35,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:35,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:28:35,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:28:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:28:35,160 INFO L87 Difference]: Start difference. First operand 250 states and 289 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:35,189 INFO L93 Difference]: Finished difference Result 296 states and 339 transitions. [2022-07-21 17:28:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:28:35,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-21 17:28:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:35,192 INFO L225 Difference]: With dead ends: 296 [2022-07-21 17:28:35,192 INFO L226 Difference]: Without dead ends: 296 [2022-07-21 17:28:35,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:35,193 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 36 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:35,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 589 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:28:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-21 17:28:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 256. [2022-07-21 17:28:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 174 states have (on average 1.5747126436781609) internal successors, (274), 238 states have internal predecessors, (274), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 295 transitions. [2022-07-21 17:28:35,200 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 295 transitions. Word has length 36 [2022-07-21 17:28:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:35,200 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 295 transitions. [2022-07-21 17:28:35,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 295 transitions. [2022-07-21 17:28:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 17:28:35,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:35,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:35,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:35,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:35,402 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:35,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1119933624, now seen corresponding path program 1 times [2022-07-21 17:28:35,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:35,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641761942] [2022-07-21 17:28:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:35,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:35,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:35,404 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:35,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:28:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:28:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:35,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:35,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:35,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641761942] [2022-07-21 17:28:35,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641761942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:35,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:35,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:28:35,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382374318] [2022-07-21 17:28:35,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:35,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:28:35,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:28:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:28:35,551 INFO L87 Difference]: Start difference. First operand 256 states and 295 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:35,577 INFO L93 Difference]: Finished difference Result 279 states and 320 transitions. [2022-07-21 17:28:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:28:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-21 17:28:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:35,578 INFO L225 Difference]: With dead ends: 279 [2022-07-21 17:28:35,578 INFO L226 Difference]: Without dead ends: 279 [2022-07-21 17:28:35,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:35,579 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 43 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:35,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 587 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:28:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-21 17:28:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 258. [2022-07-21 17:28:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 176 states have (on average 1.5681818181818181) internal successors, (276), 240 states have internal predecessors, (276), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 297 transitions. [2022-07-21 17:28:35,583 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 297 transitions. Word has length 40 [2022-07-21 17:28:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:35,583 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 297 transitions. [2022-07-21 17:28:35,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 297 transitions. [2022-07-21 17:28:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:28:35,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:35,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:35,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:35,784 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1780653040, now seen corresponding path program 1 times [2022-07-21 17:28:35,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42822097] [2022-07-21 17:28:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:35,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:35,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:35,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:35,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 17:28:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 17:28:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:36,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:36,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:36,063 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:28:36,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:28:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:36,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:36,411 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:28:36,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:36,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:36,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:36,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42822097] [2022-07-21 17:28:36,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42822097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:36,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:36,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:28:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072203392] [2022-07-21 17:28:36,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:36,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:28:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:28:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:28:36,539 INFO L87 Difference]: Start difference. First operand 258 states and 297 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:37,540 INFO L93 Difference]: Finished difference Result 266 states and 305 transitions. [2022-07-21 17:28:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:28:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-21 17:28:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:37,542 INFO L225 Difference]: With dead ends: 266 [2022-07-21 17:28:37,542 INFO L226 Difference]: Without dead ends: 266 [2022-07-21 17:28:37,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:28:37,543 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 246 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:37,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 815 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 734 Invalid, 0 Unknown, 282 Unchecked, 0.9s Time] [2022-07-21 17:28:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-21 17:28:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2022-07-21 17:28:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 176 states have (on average 1.5568181818181819) internal successors, (274), 238 states have internal predecessors, (274), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 17:28:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 295 transitions. [2022-07-21 17:28:37,546 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 295 transitions. Word has length 42 [2022-07-21 17:28:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:37,547 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 295 transitions. [2022-07-21 17:28:37,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 295 transitions. [2022-07-21 17:28:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:28:37,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:37,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:37,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:37,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:37,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1780653039, now seen corresponding path program 1 times [2022-07-21 17:28:37,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:37,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981864924] [2022-07-21 17:28:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:37,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:37,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:37,762 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:37,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 17:28:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:37,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:28:37,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:38,005 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:38,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:28:38,141 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:28:38,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-21 17:28:38,193 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 [2022-07-21 17:28:40,266 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:28:40,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2022-07-21 17:28:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:40,596 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:28:40,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 28 [2022-07-21 17:28:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:40,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:40,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:40,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981864924] [2022-07-21 17:28:40,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981864924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:40,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:40,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 17:28:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085403238] [2022-07-21 17:28:40,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:40,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:28:40,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:28:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2022-07-21 17:28:40,820 INFO L87 Difference]: Start difference. First operand 256 states and 295 transitions. Second operand has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:41,304 INFO L93 Difference]: Finished difference Result 312 states and 353 transitions. [2022-07-21 17:28:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:28:41,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-21 17:28:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:41,307 INFO L225 Difference]: With dead ends: 312 [2022-07-21 17:28:41,307 INFO L226 Difference]: Without dead ends: 312 [2022-07-21 17:28:41,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=69, Invalid=392, Unknown=1, NotChecked=0, Total=462 [2022-07-21 17:28:41,308 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 114 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:41,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1253 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 382 Invalid, 0 Unknown, 491 Unchecked, 0.4s Time] [2022-07-21 17:28:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-21 17:28:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 275. [2022-07-21 17:28:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 193 states have (on average 1.538860103626943) internal successors, (297), 255 states have internal predecessors, (297), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 321 transitions. [2022-07-21 17:28:41,312 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 321 transitions. Word has length 42 [2022-07-21 17:28:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:41,312 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 321 transitions. [2022-07-21 17:28:41,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 321 transitions. [2022-07-21 17:28:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 17:28:41,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:41,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:41,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:41,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:41,522 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONARRAY_INDEX === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1855865600, now seen corresponding path program 1 times [2022-07-21 17:28:41,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:41,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955231019] [2022-07-21 17:28:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:41,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:41,530 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:41,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 17:28:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:28:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2022-07-21 17:28:41,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 50 [2022-07-21 17:28:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:41,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 50 [2022-07-21 17:28:41,945 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-21 17:28:41,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 50 [2022-07-21 17:28:41,961 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-21 17:28:41,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 14 [2022-07-21 17:28:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:41,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:41,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:41,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955231019] [2022-07-21 17:28:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955231019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:41,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:28:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753981048] [2022-07-21 17:28:41,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:41,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:28:41,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:41,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:28:41,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:28:41,995 INFO L87 Difference]: Start difference. First operand 275 states and 321 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:42,178 INFO L93 Difference]: Finished difference Result 283 states and 329 transitions. [2022-07-21 17:28:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:28:42,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-21 17:28:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:42,180 INFO L225 Difference]: With dead ends: 283 [2022-07-21 17:28:42,180 INFO L226 Difference]: Without dead ends: 283 [2022-07-21 17:28:42,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:42,181 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 28 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:42,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 873 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-07-21 17:28:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-21 17:28:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 274. [2022-07-21 17:28:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 193 states have (on average 1.528497409326425) internal successors, (295), 254 states have internal predecessors, (295), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 319 transitions. [2022-07-21 17:28:42,185 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 319 transitions. Word has length 43 [2022-07-21 17:28:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:42,185 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 319 transitions. [2022-07-21 17:28:42,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 319 transitions. [2022-07-21 17:28:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 17:28:42,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:42,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:42,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:42,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:42,386 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:42,386 INFO L85 PathProgramCache]: Analyzing trace with hash -634310522, now seen corresponding path program 1 times [2022-07-21 17:28:42,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:42,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675903814] [2022-07-21 17:28:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:42,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:42,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:42,396 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:42,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 17:28:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:28:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:42,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:42,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675903814] [2022-07-21 17:28:42,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675903814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:42,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:42,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:28:42,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87475295] [2022-07-21 17:28:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:42,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:28:42,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:28:42,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:28:42,529 INFO L87 Difference]: Start difference. First operand 274 states and 319 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:42,548 INFO L93 Difference]: Finished difference Result 296 states and 340 transitions. [2022-07-21 17:28:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:28:42,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-21 17:28:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:42,550 INFO L225 Difference]: With dead ends: 296 [2022-07-21 17:28:42,550 INFO L226 Difference]: Without dead ends: 296 [2022-07-21 17:28:42,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:28:42,550 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 48 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:42,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 567 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:28:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-21 17:28:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 276. [2022-07-21 17:28:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 195 states have (on average 1.5179487179487179) internal successors, (296), 256 states have internal predecessors, (296), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2022-07-21 17:28:42,556 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 43 [2022-07-21 17:28:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:42,556 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2022-07-21 17:28:42,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2022-07-21 17:28:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 17:28:42,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:42,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:42,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:42,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:42,758 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1697258563, now seen corresponding path program 1 times [2022-07-21 17:28:42,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:42,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417255886] [2022-07-21 17:28:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:42,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:42,760 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:42,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 17:28:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:28:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:42,953 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:43,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:43,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417255886] [2022-07-21 17:28:43,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417255886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:43,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:43,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:28:43,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695425187] [2022-07-21 17:28:43,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:43,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:28:43,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:28:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:43,006 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:43,686 INFO L93 Difference]: Finished difference Result 324 states and 361 transitions. [2022-07-21 17:28:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:28:43,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-21 17:28:43,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:43,687 INFO L225 Difference]: With dead ends: 324 [2022-07-21 17:28:43,687 INFO L226 Difference]: Without dead ends: 324 [2022-07-21 17:28:43,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:28:43,688 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 132 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:43,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 828 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:28:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-21 17:28:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 275. [2022-07-21 17:28:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 195 states have (on average 1.5025641025641026) internal successors, (293), 255 states have internal predecessors, (293), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 317 transitions. [2022-07-21 17:28:43,707 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 317 transitions. Word has length 44 [2022-07-21 17:28:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:43,707 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 317 transitions. [2022-07-21 17:28:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 317 transitions. [2022-07-21 17:28:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 17:28:43,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:43,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:43,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:43,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:43,908 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1697258562, now seen corresponding path program 1 times [2022-07-21 17:28:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:43,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725076664] [2022-07-21 17:28:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:43,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:43,924 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:43,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 17:28:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:44,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:28:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:44,161 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:44,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:44,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:44,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725076664] [2022-07-21 17:28:44,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725076664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:44,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:44,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:28:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329282447] [2022-07-21 17:28:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:44,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:28:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:28:44,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:28:44,275 INFO L87 Difference]: Start difference. First operand 275 states and 317 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:45,020 INFO L93 Difference]: Finished difference Result 344 states and 380 transitions. [2022-07-21 17:28:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:28:45,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-21 17:28:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:45,021 INFO L225 Difference]: With dead ends: 344 [2022-07-21 17:28:45,021 INFO L226 Difference]: Without dead ends: 344 [2022-07-21 17:28:45,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:28:45,022 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 146 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:45,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 852 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:28:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-21 17:28:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 275. [2022-07-21 17:28:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 195 states have (on average 1.4923076923076923) internal successors, (291), 255 states have internal predecessors, (291), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 315 transitions. [2022-07-21 17:28:45,027 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 315 transitions. Word has length 44 [2022-07-21 17:28:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:45,027 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 315 transitions. [2022-07-21 17:28:45,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:28:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 315 transitions. [2022-07-21 17:28:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:28:45,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:45,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:45,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-21 17:28:45,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:45,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 293864698, now seen corresponding path program 1 times [2022-07-21 17:28:45,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:45,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541648496] [2022-07-21 17:28:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:45,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:45,230 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:45,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:28:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:28:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:45,440 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:45,561 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 11 treesize of output 7 [2022-07-21 17:28:45,610 INFO L356 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-07-21 17:28:45,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 47 [2022-07-21 17:28:45,649 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:28:45,650 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 19 treesize of output 11 [2022-07-21 17:28:45,912 INFO L356 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-07-21 17:28:45,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 51 [2022-07-21 17:28:46,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-07-21 17:28:46,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-07-21 17:28:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:46,690 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:28:46,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 35 [2022-07-21 17:28:46,816 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 17 treesize of output 9 [2022-07-21 17:28:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:46,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:46,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:46,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541648496] [2022-07-21 17:28:46,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541648496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:46,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:46,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-21 17:28:46,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057856757] [2022-07-21 17:28:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:46,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:28:46,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:28:46,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:28:46,880 INFO L87 Difference]: Start difference. First operand 275 states and 315 transitions. Second operand has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:47,601 INFO L93 Difference]: Finished difference Result 302 states and 339 transitions. [2022-07-21 17:28:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:28:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-21 17:28:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:47,621 INFO L225 Difference]: With dead ends: 302 [2022-07-21 17:28:47,621 INFO L226 Difference]: Without dead ends: 302 [2022-07-21 17:28:47,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:28:47,622 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 85 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:47,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1433 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 504 Unchecked, 0.5s Time] [2022-07-21 17:28:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-21 17:28:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 275. [2022-07-21 17:28:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 195 states have (on average 1.4871794871794872) internal successors, (290), 255 states have internal predecessors, (290), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 314 transitions. [2022-07-21 17:28:47,626 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 314 transitions. Word has length 45 [2022-07-21 17:28:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:47,626 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 314 transitions. [2022-07-21 17:28:47,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 314 transitions. [2022-07-21 17:28:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:28:47,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:47,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:47,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-21 17:28:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:47,838 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash 293864699, now seen corresponding path program 1 times [2022-07-21 17:28:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:47,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009348239] [2022-07-21 17:28:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:47,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:47,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:28:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:48,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 17:28:48,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:48,044 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:48,053 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:48,273 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 11 treesize of output 7 [2022-07-21 17:28:48,281 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 11 treesize of output 7 [2022-07-21 17:28:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:48,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:28:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:48,353 INFO L356 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-07-21 17:28:48,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2022-07-21 17:28:48,440 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:28:48,440 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 17 treesize of output 9 [2022-07-21 17:28:48,446 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 9 treesize of output 3 [2022-07-21 17:28:48,702 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-21 17:28:48,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-21 17:28:48,729 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-21 17:28:48,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-07-21 17:28:49,324 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 23 treesize of output 23 [2022-07-21 17:28:49,336 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 14 treesize of output 16 [2022-07-21 17:28:49,401 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 14 treesize of output 16 [2022-07-21 17:28:49,411 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 23 treesize of output 23 [2022-07-21 17:28:49,739 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 24 treesize of output 12 [2022-07-21 17:28:49,743 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 [2022-07-21 17:28:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:49,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:49,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:49,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009348239] [2022-07-21 17:28:49,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009348239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:49,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:49,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 17:28:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745690899] [2022-07-21 17:28:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:49,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:28:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:49,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:28:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:28:49,917 INFO L87 Difference]: Start difference. First operand 275 states and 314 transitions. Second operand has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:50,338 INFO L93 Difference]: Finished difference Result 276 states and 314 transitions. [2022-07-21 17:28:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:28:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-21 17:28:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:50,340 INFO L225 Difference]: With dead ends: 276 [2022-07-21 17:28:50,340 INFO L226 Difference]: Without dead ends: 276 [2022-07-21 17:28:50,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:28:50,341 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 25 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:50,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1343 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 570 Unchecked, 0.3s Time] [2022-07-21 17:28:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-21 17:28:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-07-21 17:28:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 195 states have (on average 1.4820512820512821) internal successors, (289), 255 states have internal predecessors, (289), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 313 transitions. [2022-07-21 17:28:50,345 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 313 transitions. Word has length 45 [2022-07-21 17:28:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:50,345 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 313 transitions. [2022-07-21 17:28:50,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 313 transitions. [2022-07-21 17:28:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:28:50,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:50,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:50,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-21 17:28:50,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:50,554 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1063867589, now seen corresponding path program 1 times [2022-07-21 17:28:50,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:50,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650654224] [2022-07-21 17:28:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:50,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:50,556 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:50,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:28:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 17:28:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:50,874 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 17:28:50,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 42 [2022-07-21 17:28:51,192 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 11 treesize of output 7 [2022-07-21 17:28:51,326 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-21 17:28:51,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-21 17:28:51,550 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 18 [2022-07-21 17:28:51,563 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 11 treesize of output 7 [2022-07-21 17:28:51,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:51,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:51,665 INFO L356 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-07-21 17:28:51,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 58 [2022-07-21 17:28:51,783 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:28:51,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-07-21 17:28:52,088 INFO L356 Elim1Store]: treesize reduction 13, result has 68.3 percent of original size [2022-07-21 17:28:52,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 54 [2022-07-21 17:28:52,317 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:28:52,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 17:28:52,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:28:52,411 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:28:52,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 17:28:52,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:28:52,855 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 [2022-07-21 17:28:53,175 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:28:53,176 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 26 [2022-07-21 17:28:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:53,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:53,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:53,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650654224] [2022-07-21 17:28:53,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650654224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:53,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:53,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-21 17:28:53,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525726228] [2022-07-21 17:28:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:53,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 17:28:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 17:28:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:28:53,343 INFO L87 Difference]: Start difference. First operand 275 states and 313 transitions. Second operand has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:53,970 INFO L93 Difference]: Finished difference Result 275 states and 312 transitions. [2022-07-21 17:28:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:28:53,971 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-07-21 17:28:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:53,972 INFO L225 Difference]: With dead ends: 275 [2022-07-21 17:28:53,972 INFO L226 Difference]: Without dead ends: 275 [2022-07-21 17:28:53,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:28:53,973 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 15 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:53,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1737 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 447 Unchecked, 0.3s Time] [2022-07-21 17:28:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-21 17:28:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-07-21 17:28:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 195 states have (on average 1.476923076923077) internal successors, (288), 255 states have internal predecessors, (288), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 312 transitions. [2022-07-21 17:28:53,977 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 312 transitions. Word has length 47 [2022-07-21 17:28:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:53,977 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 312 transitions. [2022-07-21 17:28:53,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 312 transitions. [2022-07-21 17:28:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:28:53,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:53,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:53,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-21 17:28:54,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:54,179 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting free_reportsErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1063867588, now seen corresponding path program 1 times [2022-07-21 17:28:54,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:54,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974926141] [2022-07-21 17:28:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:54,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:54,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:54,180 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:54,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:28:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-21 17:28:54,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:54,470 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:54,542 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:28:54,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2022-07-21 17:28:54,764 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 11 treesize of output 7 [2022-07-21 17:28:54,768 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 11 treesize of output 7 [2022-07-21 17:28:54,840 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-21 17:28:54,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-21 17:28:54,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:54,857 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 21 treesize of output 20 [2022-07-21 17:28:55,054 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 18 [2022-07-21 17:28:55,058 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 23 treesize of output 22 [2022-07-21 17:28:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:55,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:28:55,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:55,195 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:28:55,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-21 17:28:55,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-21 17:28:55,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-21 17:28:55,667 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-21 17:28:55,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-21 17:28:55,713 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-21 17:28:55,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2022-07-21 17:28:56,441 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:28:56,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 61 [2022-07-21 17:28:56,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:28:57,330 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:28:57,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 61 [2022-07-21 17:28:57,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:28:58,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:28:58,167 INFO L356 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2022-07-21 17:28:58,167 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 49 [2022-07-21 17:28:58,176 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:28:58,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 17:28:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:28:58,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:28:58,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974926141] [2022-07-21 17:28:58,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974926141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:28:58,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:28:58,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-21 17:28:58,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361542283] [2022-07-21 17:28:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:28:58,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 17:28:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 17:28:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:28:58,363 INFO L87 Difference]: Start difference. First operand 275 states and 312 transitions. Second operand has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:58,741 INFO L93 Difference]: Finished difference Result 275 states and 311 transitions. [2022-07-21 17:28:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 17:28:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-07-21 17:28:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:58,743 INFO L225 Difference]: With dead ends: 275 [2022-07-21 17:28:58,743 INFO L226 Difference]: Without dead ends: 275 [2022-07-21 17:28:58,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:28:58,744 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 9 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1071 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:58,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1920 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 1071 Unchecked, 0.3s Time] [2022-07-21 17:28:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-21 17:28:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-07-21 17:28:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 195 states have (on average 1.471794871794872) internal successors, (287), 255 states have internal predecessors, (287), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:28:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 311 transitions. [2022-07-21 17:28:58,748 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 311 transitions. Word has length 47 [2022-07-21 17:28:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:58,748 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 311 transitions. [2022-07-21 17:28:58,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:28:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 311 transitions. [2022-07-21 17:28:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:28:58,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:58,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:58,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:58,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:58,950 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:28:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:58,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1620254662, now seen corresponding path program 1 times [2022-07-21 17:28:58,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:58,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089822889] [2022-07-21 17:28:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:58,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:58,952 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:28:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 17:28:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:59,470 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:28:59,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2022-07-21 17:28:59,661 INFO L356 Elim1Store]: treesize reduction 29, result has 50.0 percent of original size [2022-07-21 17:28:59,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 45 [2022-07-21 17:28:59,796 INFO L356 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2022-07-21 17:28:59,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 39 treesize of output 76 [2022-07-21 17:28:59,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:29:00,274 INFO L356 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2022-07-21 17:29:00,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-21 17:29:00,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:29:00,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:29:00,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:29:00,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:29:01,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:29:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:01,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:01,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:01,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089822889] [2022-07-21 17:29:01,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089822889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:01,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:01,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 17:29:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391194258] [2022-07-21 17:29:01,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:01,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 17:29:01,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:01,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 17:29:01,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:29:01,574 INFO L87 Difference]: Start difference. First operand 275 states and 311 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:02,012 INFO L93 Difference]: Finished difference Result 288 states and 326 transitions. [2022-07-21 17:29:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:29:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-07-21 17:29:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:02,035 INFO L225 Difference]: With dead ends: 288 [2022-07-21 17:29:02,035 INFO L226 Difference]: Without dead ends: 288 [2022-07-21 17:29:02,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:29:02,036 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 69 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 874 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:02,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1467 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 874 Unchecked, 0.3s Time] [2022-07-21 17:29:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-21 17:29:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 281. [2022-07-21 17:29:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 201 states have (on average 1.462686567164179) internal successors, (294), 261 states have internal predecessors, (294), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:29:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2022-07-21 17:29:02,042 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 47 [2022-07-21 17:29:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:02,042 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2022-07-21 17:29:02,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2022-07-21 17:29:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:29:02,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:02,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:02,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:02,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:02,244 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1620254663, now seen corresponding path program 1 times [2022-07-21 17:29:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:02,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726853475] [2022-07-21 17:29:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:02,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:02,245 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:02,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 17:29:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 17:29:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:02,696 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:29:02,715 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:29:02,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:29:02,819 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:02,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:02,843 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:29:02,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:29:02,892 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:02,892 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 13 treesize of output 9 [2022-07-21 17:29:03,020 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:03,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-07-21 17:29:03,052 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-21 17:29:03,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:29:03,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:29:03,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:29:03,456 INFO L356 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2022-07-21 17:29:03,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-21 17:29:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:03,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-21 17:29:03,604 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:03,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:03,610 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 [2022-07-21 17:29:03,637 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:03,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:03,645 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 [2022-07-21 17:29:03,751 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:03,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:03,755 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 [2022-07-21 17:29:03,777 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:03,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:03,781 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 [2022-07-21 17:29:03,904 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:03,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:03,910 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 [2022-07-21 17:29:03,941 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:03,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:03,944 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 [2022-07-21 17:29:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:04,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:29:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:04,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:29:04,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:29:04,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:29:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:04,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:04,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726853475] [2022-07-21 17:29:04,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726853475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:04,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:04,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 17:29:04,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593695432] [2022-07-21 17:29:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:04,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:29:04,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:29:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:29:04,418 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:05,802 INFO L93 Difference]: Finished difference Result 288 states and 325 transitions. [2022-07-21 17:29:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:29:05,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-07-21 17:29:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:05,803 INFO L225 Difference]: With dead ends: 288 [2022-07-21 17:29:05,803 INFO L226 Difference]: Without dead ends: 288 [2022-07-21 17:29:05,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:29:05,804 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 85 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:05,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1355 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 711 Invalid, 0 Unknown, 626 Unchecked, 0.8s Time] [2022-07-21 17:29:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-21 17:29:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 281. [2022-07-21 17:29:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 201 states have (on average 1.4577114427860696) internal successors, (293), 261 states have internal predecessors, (293), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:29:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 317 transitions. [2022-07-21 17:29:05,808 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 317 transitions. Word has length 47 [2022-07-21 17:29:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:05,808 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 317 transitions. [2022-07-21 17:29:05,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 317 transitions. [2022-07-21 17:29:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:29:05,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:05,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:05,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:06,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:06,009 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:06,009 INFO L85 PathProgramCache]: Analyzing trace with hash -727934890, now seen corresponding path program 1 times [2022-07-21 17:29:06,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:06,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403298433] [2022-07-21 17:29:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:06,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:06,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:06,012 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:06,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:29:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:06,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:29:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:06,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:06,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:06,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403298433] [2022-07-21 17:29:06,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403298433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:06,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:06,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:29:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946925138] [2022-07-21 17:29:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:29:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:06,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:29:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:29:06,272 INFO L87 Difference]: Start difference. First operand 281 states and 317 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:06,287 INFO L93 Difference]: Finished difference Result 298 states and 332 transitions. [2022-07-21 17:29:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:29:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-21 17:29:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:06,291 INFO L225 Difference]: With dead ends: 298 [2022-07-21 17:29:06,291 INFO L226 Difference]: Without dead ends: 298 [2022-07-21 17:29:06,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:29:06,292 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 79 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:06,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 558 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:29:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-21 17:29:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 279. [2022-07-21 17:29:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 199 states have (on average 1.4472361809045227) internal successors, (288), 259 states have internal predecessors, (288), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:29:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 312 transitions. [2022-07-21 17:29:06,310 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 312 transitions. Word has length 49 [2022-07-21 17:29:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:06,311 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 312 transitions. [2022-07-21 17:29:06,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 312 transitions. [2022-07-21 17:29:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:29:06,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:06,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:06,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-21 17:29:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:06,521 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2130667900, now seen corresponding path program 1 times [2022-07-21 17:29:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:06,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929537473] [2022-07-21 17:29:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:06,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:06,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:06,523 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:06,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 17:29:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:07,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-21 17:29:07,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:07,293 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:29:07,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2022-07-21 17:29:07,467 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 11 treesize of output 7 [2022-07-21 17:29:07,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:07,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:07,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:07,520 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:29:07,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 39 [2022-07-21 17:29:07,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:07,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:07,597 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:29:07,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-07-21 17:29:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:07,817 INFO L356 Elim1Store]: treesize reduction 100, result has 36.3 percent of original size [2022-07-21 17:29:07,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 38 treesize of output 79 [2022-07-21 17:29:08,176 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-21 17:29:08,176 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 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-21 17:29:08,282 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 11 treesize of output 7 [2022-07-21 17:29:08,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-21 17:29:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:08,843 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:08,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 61 [2022-07-21 17:29:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:09,456 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:09,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:29:09,547 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:09,547 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:09,553 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 [2022-07-21 17:29:09,643 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:09,643 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:09,646 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 [2022-07-21 17:29:09,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:09,667 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:09,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:29:10,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:10,061 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:10,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:29:10,175 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:10,175 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-21 17:29:10,181 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 [2022-07-21 17:29:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:10,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:10,410 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:10,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:29:10,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:10,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:29:11,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:29:12,815 INFO L356 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-07-21 17:29:12,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2022-07-21 17:29:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:14,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:14,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:14,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929537473] [2022-07-21 17:29:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929537473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:14,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:14,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 17:29:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610701552] [2022-07-21 17:29:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:29:14,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:29:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:29:14,551 INFO L87 Difference]: Start difference. First operand 279 states and 312 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:15,588 INFO L93 Difference]: Finished difference Result 304 states and 343 transitions. [2022-07-21 17:29:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:29:15,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2022-07-21 17:29:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:15,589 INFO L225 Difference]: With dead ends: 304 [2022-07-21 17:29:15,589 INFO L226 Difference]: Without dead ends: 304 [2022-07-21 17:29:15,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:29:15,591 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 84 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1049 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:15,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1792 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 640 Invalid, 0 Unknown, 1049 Unchecked, 0.6s Time] [2022-07-21 17:29:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-21 17:29:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 282. [2022-07-21 17:29:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 202 states have (on average 1.4504950495049505) internal successors, (293), 262 states have internal predecessors, (293), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:29:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 317 transitions. [2022-07-21 17:29:15,596 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 317 transitions. Word has length 50 [2022-07-21 17:29:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:15,596 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 317 transitions. [2022-07-21 17:29:15,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 317 transitions. [2022-07-21 17:29:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:29:15,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:15,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:15,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:15,811 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2130667899, now seen corresponding path program 1 times [2022-07-21 17:29:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920026235] [2022-07-21 17:29:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:15,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:15,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:15,813 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:15,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:29:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-21 17:29:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:16,357 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:29:16,405 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-21 17:29:16,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 33 [2022-07-21 17:29:16,586 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 11 treesize of output 7 [2022-07-21 17:29:16,596 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 11 treesize of output 7 [2022-07-21 17:29:16,636 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-21 17:29:16,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-21 17:29:16,684 INFO L356 Elim1Store]: treesize reduction 81, result has 35.7 percent of original size [2022-07-21 17:29:16,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 67 [2022-07-21 17:29:16,770 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-21 17:29:16,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2022-07-21 17:29:16,793 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 9 treesize of output 3 [2022-07-21 17:29:17,032 INFO L356 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2022-07-21 17:29:17,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 48 [2022-07-21 17:29:17,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:29:17,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2022-07-21 17:29:17,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 17:29:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,875 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:17,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 71 [2022-07-21 17:29:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-07-21 17:29:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:17,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2022-07-21 17:29:18,437 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-21 17:29:18,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-07-21 17:29:18,459 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 [2022-07-21 17:29:18,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,477 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:18,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-07-21 17:29:18,520 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:18,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-07-21 17:29:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-21 17:29:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,715 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:18,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-07-21 17:29:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,763 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-21 17:29:18,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 34 [2022-07-21 17:29:18,767 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 [2022-07-21 17:29:18,802 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:18,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-07-21 17:29:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:18,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-21 17:29:19,026 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:29:19,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-07-21 17:29:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-21 17:29:19,085 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-21 17:29:19,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-07-21 17:29:19,116 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 [2022-07-21 17:29:19,137 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 [2022-07-21 17:29:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,179 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:19,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-07-21 17:29:19,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,413 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:19,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-07-21 17:29:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-07-21 17:29:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:19,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-21 17:29:24,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2022-07-21 17:29:25,048 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-21 17:29:25,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 45 [2022-07-21 17:29:25,060 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:29:25,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-21 17:29:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:25,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:25,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920026235] [2022-07-21 17:29:25,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920026235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:25,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:25,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-21 17:29:25,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590117251] [2022-07-21 17:29:25,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:25,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 17:29:25,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:25,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 17:29:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:29:25,297 INFO L87 Difference]: Start difference. First operand 282 states and 317 transitions. Second operand has 29 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:26,228 INFO L93 Difference]: Finished difference Result 364 states and 409 transitions. [2022-07-21 17:29:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 17:29:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2022-07-21 17:29:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:26,230 INFO L225 Difference]: With dead ends: 364 [2022-07-21 17:29:26,230 INFO L226 Difference]: Without dead ends: 364 [2022-07-21 17:29:26,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 17:29:26,231 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 113 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1543 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:26,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 2666 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 657 Invalid, 0 Unknown, 1543 Unchecked, 0.6s Time] [2022-07-21 17:29:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-21 17:29:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 307. [2022-07-21 17:29:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 227 states have (on average 1.4140969162995596) internal successors, (321), 287 states have internal predecessors, (321), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 17:29:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 345 transitions. [2022-07-21 17:29:26,255 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 345 transitions. Word has length 50 [2022-07-21 17:29:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:26,255 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 345 transitions. [2022-07-21 17:29:26,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 345 transitions. [2022-07-21 17:29:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:29:26,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:26,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:26,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:26,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:26,460 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1565616984, now seen corresponding path program 1 times [2022-07-21 17:29:26,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:26,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682412280] [2022-07-21 17:29:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:26,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:26,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:26,463 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:26,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:29:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:29:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:26,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:26,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:26,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682412280] [2022-07-21 17:29:26,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682412280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:26,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:26,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:29:26,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588663914] [2022-07-21 17:29:26,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:26,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:29:26,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:26,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:29:26,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:29:26,672 INFO L87 Difference]: Start difference. First operand 307 states and 345 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:26,960 INFO L93 Difference]: Finished difference Result 327 states and 365 transitions. [2022-07-21 17:29:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:29:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-21 17:29:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:26,962 INFO L225 Difference]: With dead ends: 327 [2022-07-21 17:29:26,962 INFO L226 Difference]: Without dead ends: 327 [2022-07-21 17:29:26,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:29:26,963 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 44 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:26,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 522 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:29:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-21 17:29:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 319. [2022-07-21 17:29:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 238 states have (on average 1.4243697478991597) internal successors, (339), 297 states have internal predecessors, (339), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-21 17:29:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 365 transitions. [2022-07-21 17:29:26,987 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 365 transitions. Word has length 52 [2022-07-21 17:29:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:26,987 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 365 transitions. [2022-07-21 17:29:26,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 365 transitions. [2022-07-21 17:29:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:29:26,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:26,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:27,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:27,196 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1565616985, now seen corresponding path program 1 times [2022-07-21 17:29:27,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:27,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213617407] [2022-07-21 17:29:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:27,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:27,198 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:27,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 17:29:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:27,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 17:29:27,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:27,637 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 17:29:27,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 44 [2022-07-21 17:29:27,816 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 11 treesize of output 7 [2022-07-21 17:29:27,821 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 11 treesize of output 7 [2022-07-21 17:29:27,892 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-21 17:29:27,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-21 17:29:27,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:27,900 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 21 treesize of output 20 [2022-07-21 17:29:28,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 17:29:28,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-21 17:29:28,219 INFO L356 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2022-07-21 17:29:28,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 70 [2022-07-21 17:29:28,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 17:29:28,657 INFO L356 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2022-07-21 17:29:28,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-07-21 17:29:29,940 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:29:29,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 67 [2022-07-21 17:29:29,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:29:30,204 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:29:30,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 67 [2022-07-21 17:29:30,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:29:30,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:29:30,832 INFO L356 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-07-21 17:29:30,832 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 31 [2022-07-21 17:29:30,840 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-07-21 17:29:30,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-07-21 17:29:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:30,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:30,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:30,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213617407] [2022-07-21 17:29:30,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213617407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:30,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:30,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-21 17:29:30,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301766134] [2022-07-21 17:29:30,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:30,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 17:29:30,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 17:29:30,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:29:30,987 INFO L87 Difference]: Start difference. First operand 319 states and 365 transitions. Second operand has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:31,613 INFO L93 Difference]: Finished difference Result 319 states and 363 transitions. [2022-07-21 17:29:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:29:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-07-21 17:29:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:31,614 INFO L225 Difference]: With dead ends: 319 [2022-07-21 17:29:31,614 INFO L226 Difference]: Without dead ends: 319 [2022-07-21 17:29:31,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-07-21 17:29:31,615 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 16 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:31,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1957 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 305 Invalid, 0 Unknown, 468 Unchecked, 0.5s Time] [2022-07-21 17:29:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-21 17:29:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-07-21 17:29:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 238 states have (on average 1.4201680672268908) internal successors, (338), 297 states have internal predecessors, (338), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 363 transitions. [2022-07-21 17:29:31,619 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 363 transitions. Word has length 52 [2022-07-21 17:29:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:31,619 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 363 transitions. [2022-07-21 17:29:31,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 363 transitions. [2022-07-21 17:29:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:29:31,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:31,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:31,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:31,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:31,830 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:31,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1996654393, now seen corresponding path program 1 times [2022-07-21 17:29:31,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:31,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298431723] [2022-07-21 17:29:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:31,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:31,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:31,832 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:31,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-21 17:29:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-21 17:29:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:32,409 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 6 treesize of output 5 [2022-07-21 17:29:32,488 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 17:29:32,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-21 17:29:32,759 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 11 treesize of output 7 [2022-07-21 17:29:32,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:29:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:32,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:29:32,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:32,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-07-21 17:29:32,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-21 17:29:32,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:32,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:32,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-21 17:29:33,145 INFO L356 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2022-07-21 17:29:33,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 32 treesize of output 38 [2022-07-21 17:29:33,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:29:33,526 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:33,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-07-21 17:29:33,535 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:29:33,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 65 [2022-07-21 17:29:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,840 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:33,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 115 [2022-07-21 17:29:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,890 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:29:33,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 104 [2022-07-21 17:29:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 88 [2022-07-21 17:29:34,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,210 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:29:34,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 104 [2022-07-21 17:29:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 88 [2022-07-21 17:29:34,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,287 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:29:34,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 104 [2022-07-21 17:29:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 88 [2022-07-21 17:29:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,406 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:29:34,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 104 [2022-07-21 17:29:34,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 88 [2022-07-21 17:29:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:34,552 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:29:34,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 104 [2022-07-21 17:29:35,523 INFO L356 Elim1Store]: treesize reduction 37, result has 30.2 percent of original size [2022-07-21 17:29:35,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 141 treesize of output 75 [2022-07-21 17:29:35,533 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:35,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 21 [2022-07-21 17:29:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:36,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:36,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:36,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298431723] [2022-07-21 17:29:36,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298431723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:36,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:36,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-21 17:29:36,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318607507] [2022-07-21 17:29:36,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:36,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:29:36,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:29:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:29:36,065 INFO L87 Difference]: Start difference. First operand 319 states and 363 transitions. Second operand has 26 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:37,195 INFO L93 Difference]: Finished difference Result 357 states and 402 transitions. [2022-07-21 17:29:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 17:29:37,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2022-07-21 17:29:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:37,199 INFO L225 Difference]: With dead ends: 357 [2022-07-21 17:29:37,200 INFO L226 Difference]: Without dead ends: 357 [2022-07-21 17:29:37,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 17:29:37,200 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 104 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1249 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:37,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 2117 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 491 Invalid, 0 Unknown, 1249 Unchecked, 0.7s Time] [2022-07-21 17:29:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-21 17:29:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 319. [2022-07-21 17:29:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 238 states have (on average 1.415966386554622) internal successors, (337), 297 states have internal predecessors, (337), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 362 transitions. [2022-07-21 17:29:37,204 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 362 transitions. Word has length 50 [2022-07-21 17:29:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:37,204 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 362 transitions. [2022-07-21 17:29:37,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 362 transitions. [2022-07-21 17:29:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:29:37,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:37,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:37,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:37,405 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1127553029, now seen corresponding path program 1 times [2022-07-21 17:29:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769395096] [2022-07-21 17:29:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:37,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:37,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:37,407 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:37,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 17:29:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 17:29:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:37,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:37,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769395096] [2022-07-21 17:29:37,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769395096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:37,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:37,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:29:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487624183] [2022-07-21 17:29:37,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:29:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:29:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:29:37,661 INFO L87 Difference]: Start difference. First operand 319 states and 362 transitions. Second operand has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:37,845 INFO L93 Difference]: Finished difference Result 385 states and 437 transitions. [2022-07-21 17:29:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:29:37,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-21 17:29:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:37,846 INFO L225 Difference]: With dead ends: 385 [2022-07-21 17:29:37,846 INFO L226 Difference]: Without dead ends: 385 [2022-07-21 17:29:37,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:29:37,847 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 48 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:37,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 330 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:29:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-07-21 17:29:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 318. [2022-07-21 17:29:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 238 states have (on average 1.403361344537815) internal successors, (334), 296 states have internal predecessors, (334), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 359 transitions. [2022-07-21 17:29:37,851 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 359 transitions. Word has length 52 [2022-07-21 17:29:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:37,851 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 359 transitions. [2022-07-21 17:29:37,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 359 transitions. [2022-07-21 17:29:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:29:37,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:37,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:37,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:38,060 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1065513416, now seen corresponding path program 1 times [2022-07-21 17:29:38,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396121734] [2022-07-21 17:29:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:38,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:38,062 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:38,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 17:29:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:38,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:29:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:38,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:38,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396121734] [2022-07-21 17:29:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396121734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:38,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:38,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:29:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67923352] [2022-07-21 17:29:38,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:38,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:29:38,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:29:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:29:38,368 INFO L87 Difference]: Start difference. First operand 318 states and 359 transitions. Second operand has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:39,006 INFO L93 Difference]: Finished difference Result 424 states and 478 transitions. [2022-07-21 17:29:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:29:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-21 17:29:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:39,008 INFO L225 Difference]: With dead ends: 424 [2022-07-21 17:29:39,008 INFO L226 Difference]: Without dead ends: 424 [2022-07-21 17:29:39,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:29:39,009 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 82 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:39,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 364 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:29:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-07-21 17:29:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 314. [2022-07-21 17:29:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 235 states have (on average 1.3957446808510638) internal successors, (328), 292 states have internal predecessors, (328), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 353 transitions. [2022-07-21 17:29:39,013 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 353 transitions. Word has length 52 [2022-07-21 17:29:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:39,013 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 353 transitions. [2022-07-21 17:29:39,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 353 transitions. [2022-07-21 17:29:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:29:39,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:39,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:39,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:39,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:39,214 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:39,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1041751103, now seen corresponding path program 1 times [2022-07-21 17:29:39,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:39,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561787806] [2022-07-21 17:29:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:39,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:39,217 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:39,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-21 17:29:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 17:29:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:39,535 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 11 treesize of output 7 [2022-07-21 17:29:39,687 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-21 17:29:39,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 17:29:39,740 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:39,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 49 [2022-07-21 17:29:39,844 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 [2022-07-21 17:29:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:39,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:39,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561787806] [2022-07-21 17:29:39,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561787806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:39,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:39,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 17:29:39,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783810506] [2022-07-21 17:29:39,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:39,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:29:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:29:39,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:29:39,859 INFO L87 Difference]: Start difference. First operand 314 states and 353 transitions. Second operand has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:29:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:41,133 INFO L93 Difference]: Finished difference Result 323 states and 361 transitions. [2022-07-21 17:29:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:29:41,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2022-07-21 17:29:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:41,135 INFO L225 Difference]: With dead ends: 323 [2022-07-21 17:29:41,135 INFO L226 Difference]: Without dead ends: 323 [2022-07-21 17:29:41,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:29:41,135 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 495 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:41,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1541 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 17:29:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-21 17:29:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 314. [2022-07-21 17:29:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 236 states have (on average 1.3898305084745763) internal successors, (328), 292 states have internal predecessors, (328), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 353 transitions. [2022-07-21 17:29:41,139 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 353 transitions. Word has length 54 [2022-07-21 17:29:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:41,139 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 353 transitions. [2022-07-21 17:29:41,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:29:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 353 transitions. [2022-07-21 17:29:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:29:41,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:41,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:41,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-21 17:29:41,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:41,340 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2065453880, now seen corresponding path program 1 times [2022-07-21 17:29:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329316444] [2022-07-21 17:29:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:41,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:41,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:41,342 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:41,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 17:29:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:41,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 17:29:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:41,701 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:29:41,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-21 17:29:41,883 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 11 treesize of output 7 [2022-07-21 17:29:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:41,933 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:29:41,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2022-07-21 17:29:41,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-07-21 17:29:42,184 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:29:42,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2022-07-21 17:29:42,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-07-21 17:29:42,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 53 [2022-07-21 17:29:42,902 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:42,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 18 [2022-07-21 17:29:43,163 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:29:43,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2022-07-21 17:29:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:43,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:43,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329316444] [2022-07-21 17:29:43,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329316444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:43,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:43,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 17:29:43,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823359403] [2022-07-21 17:29:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:43,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:29:43,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:29:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:29:43,240 INFO L87 Difference]: Start difference. First operand 314 states and 353 transitions. Second operand has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:29:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:45,092 INFO L93 Difference]: Finished difference Result 349 states and 384 transitions. [2022-07-21 17:29:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:29:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2022-07-21 17:29:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:45,094 INFO L225 Difference]: With dead ends: 349 [2022-07-21 17:29:45,094 INFO L226 Difference]: Without dead ends: 349 [2022-07-21 17:29:45,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 17:29:45,095 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 307 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:45,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1445 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 933 Invalid, 0 Unknown, 629 Unchecked, 1.2s Time] [2022-07-21 17:29:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-21 17:29:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 315. [2022-07-21 17:29:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 237 states have (on average 1.3881856540084387) internal successors, (329), 293 states have internal predecessors, (329), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 354 transitions. [2022-07-21 17:29:45,102 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 354 transitions. Word has length 55 [2022-07-21 17:29:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:45,103 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 354 transitions. [2022-07-21 17:29:45,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:29:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 354 transitions. [2022-07-21 17:29:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:29:45,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:45,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:45,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-07-21 17:29:45,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:45,313 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:45,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1728414038, now seen corresponding path program 1 times [2022-07-21 17:29:45,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:45,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913798128] [2022-07-21 17:29:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:45,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:45,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:45,316 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:45,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-21 17:29:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:45,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:29:45,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:45,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:45,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:45,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913798128] [2022-07-21 17:29:45,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913798128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:45,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:45,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:29:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136083469] [2022-07-21 17:29:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:29:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:29:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:29:45,614 INFO L87 Difference]: Start difference. First operand 315 states and 354 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:45,666 INFO L93 Difference]: Finished difference Result 397 states and 440 transitions. [2022-07-21 17:29:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:29:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-07-21 17:29:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:45,668 INFO L225 Difference]: With dead ends: 397 [2022-07-21 17:29:45,668 INFO L226 Difference]: Without dead ends: 397 [2022-07-21 17:29:45,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:29:45,668 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 144 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:45,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1017 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:29:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-21 17:29:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 323. [2022-07-21 17:29:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 245 states have (on average 1.3755102040816327) internal successors, (337), 301 states have internal predecessors, (337), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 362 transitions. [2022-07-21 17:29:45,685 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 362 transitions. Word has length 54 [2022-07-21 17:29:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:45,685 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 362 transitions. [2022-07-21 17:29:45,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:29:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 362 transitions. [2022-07-21 17:29:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:29:45,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:45,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:45,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:45,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:45,886 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash 395439457, now seen corresponding path program 1 times [2022-07-21 17:29:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:45,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592680521] [2022-07-21 17:29:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:45,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:45,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:45,904 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:45,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-21 17:29:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:46,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:29:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:46,200 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 17 treesize of output 9 [2022-07-21 17:29:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:46,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:46,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:46,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592680521] [2022-07-21 17:29:46,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592680521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:46,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:46,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:29:46,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971648948] [2022-07-21 17:29:46,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:46,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:29:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:29:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:29:46,214 INFO L87 Difference]: Start difference. First operand 323 states and 362 transitions. Second operand has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:29:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:46,716 INFO L93 Difference]: Finished difference Result 331 states and 370 transitions. [2022-07-21 17:29:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:29:46,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-07-21 17:29:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:46,717 INFO L225 Difference]: With dead ends: 331 [2022-07-21 17:29:46,717 INFO L226 Difference]: Without dead ends: 331 [2022-07-21 17:29:46,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:29:46,717 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 50 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:46,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 763 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:29:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-21 17:29:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2022-07-21 17:29:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 250 states have (on average 1.38) internal successors, (345), 305 states have internal predecessors, (345), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 370 transitions. [2022-07-21 17:29:46,721 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 370 transitions. Word has length 56 [2022-07-21 17:29:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:46,721 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 370 transitions. [2022-07-21 17:29:46,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:29:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 370 transitions. [2022-07-21 17:29:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 17:29:46,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:46,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-21 17:29:46,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:46,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:46,938 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:46,939 INFO L85 PathProgramCache]: Analyzing trace with hash -221672310, now seen corresponding path program 1 times [2022-07-21 17:29:46,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:46,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868869720] [2022-07-21 17:29:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:46,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:46,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:46,941 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:46,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-21 17:29:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:29:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:47,397 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:29:47,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:29:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:47,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:29:47,567 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:29:47,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:29:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:47,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:47,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:47,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868869720] [2022-07-21 17:29:47,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868869720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:47,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:47,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:29:47,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771184963] [2022-07-21 17:29:47,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:47,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:29:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:29:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:29:47,685 INFO L87 Difference]: Start difference. First operand 328 states and 370 transitions. Second operand has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:48,349 INFO L93 Difference]: Finished difference Result 338 states and 377 transitions. [2022-07-21 17:29:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:29:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2022-07-21 17:29:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:48,350 INFO L225 Difference]: With dead ends: 338 [2022-07-21 17:29:48,350 INFO L226 Difference]: Without dead ends: 338 [2022-07-21 17:29:48,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:29:48,351 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 95 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:48,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 931 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 613 Invalid, 0 Unknown, 212 Unchecked, 0.6s Time] [2022-07-21 17:29:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-21 17:29:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 327. [2022-07-21 17:29:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 250 states have (on average 1.372) internal successors, (343), 304 states have internal predecessors, (343), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 368 transitions. [2022-07-21 17:29:48,355 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 368 transitions. Word has length 58 [2022-07-21 17:29:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:48,356 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 368 transitions. [2022-07-21 17:29:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 368 transitions. [2022-07-21 17:29:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 17:29:48,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:48,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-21 17:29:48,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-21 17:29:48,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:48,567 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash -221672309, now seen corresponding path program 1 times [2022-07-21 17:29:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:48,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316921344] [2022-07-21 17:29:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:48,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:48,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:48,569 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:48,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-21 17:29:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:48,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:29:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:49,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:29:49,075 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:29:49,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:29:49,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:49,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:29:49,401 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:29:49,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:29:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:49,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:49,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:49,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316921344] [2022-07-21 17:29:49,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316921344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:49,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:49,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:29:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702934539] [2022-07-21 17:29:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:29:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:29:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:29:49,606 INFO L87 Difference]: Start difference. First operand 327 states and 368 transitions. Second operand has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:50,645 INFO L93 Difference]: Finished difference Result 328 states and 366 transitions. [2022-07-21 17:29:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:29:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2022-07-21 17:29:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:50,647 INFO L225 Difference]: With dead ends: 328 [2022-07-21 17:29:50,647 INFO L226 Difference]: Without dead ends: 328 [2022-07-21 17:29:50,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:29:50,648 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 137 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:50,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 782 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 771 Invalid, 0 Unknown, 259 Unchecked, 0.9s Time] [2022-07-21 17:29:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-21 17:29:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2022-07-21 17:29:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 250 states have (on average 1.364) internal successors, (341), 303 states have internal predecessors, (341), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 366 transitions. [2022-07-21 17:29:50,679 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 366 transitions. Word has length 58 [2022-07-21 17:29:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:50,680 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 366 transitions. [2022-07-21 17:29:50,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:29:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 366 transitions. [2022-07-21 17:29:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:29:50,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:50,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:50,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:50,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:50,882 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash -106046336, now seen corresponding path program 1 times [2022-07-21 17:29:50,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:50,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431783184] [2022-07-21 17:29:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:50,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:50,884 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:50,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-21 17:29:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:29:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:51,418 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:29:51,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-21 17:29:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:51,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:51,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:51,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431783184] [2022-07-21 17:29:51,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431783184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:51,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:51,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:29:51,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640269012] [2022-07-21 17:29:51,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:51,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:29:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:29:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:29:51,428 INFO L87 Difference]: Start difference. First operand 326 states and 366 transitions. Second operand has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:29:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:51,825 INFO L93 Difference]: Finished difference Result 393 states and 434 transitions. [2022-07-21 17:29:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:29:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-07-21 17:29:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:51,827 INFO L225 Difference]: With dead ends: 393 [2022-07-21 17:29:51,827 INFO L226 Difference]: Without dead ends: 393 [2022-07-21 17:29:51,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:29:51,827 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 104 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:51,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 465 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 190 Invalid, 0 Unknown, 112 Unchecked, 0.4s Time] [2022-07-21 17:29:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-21 17:29:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 325. [2022-07-21 17:29:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 250 states have (on average 1.36) internal successors, (340), 302 states have internal predecessors, (340), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 365 transitions. [2022-07-21 17:29:51,832 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 365 transitions. Word has length 59 [2022-07-21 17:29:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:51,832 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 365 transitions. [2022-07-21 17:29:51,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:29:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 365 transitions. [2022-07-21 17:29:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:29:51,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:51,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:51,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:52,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:52,033 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash -106046335, now seen corresponding path program 1 times [2022-07-21 17:29:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:52,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722976467] [2022-07-21 17:29:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:52,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:52,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:52,036 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:52,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-21 17:29:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:52,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:29:52,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:52,631 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:29:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:54,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 17:29:54,840 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:29:54,840 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 11 treesize of output 11 [2022-07-21 17:29:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:29:54,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:29:54,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:54,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722976467] [2022-07-21 17:29:54,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722976467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:29:54,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:29:54,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:29:54,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22995075] [2022-07-21 17:29:54,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:29:54,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:29:54,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:54,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:29:54,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-07-21 17:29:54,930 INFO L87 Difference]: Start difference. First operand 325 states and 365 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:29:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:55,976 INFO L93 Difference]: Finished difference Result 450 states and 496 transitions. [2022-07-21 17:29:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:29:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-07-21 17:29:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:55,978 INFO L225 Difference]: With dead ends: 450 [2022-07-21 17:29:55,978 INFO L226 Difference]: Without dead ends: 450 [2022-07-21 17:29:55,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-07-21 17:29:55,979 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 213 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:55,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 486 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 131 Unchecked, 1.0s Time] [2022-07-21 17:29:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-07-21 17:29:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 324. [2022-07-21 17:29:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 250 states have (on average 1.356) internal successors, (339), 301 states have internal predecessors, (339), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 17:29:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 364 transitions. [2022-07-21 17:29:55,982 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 364 transitions. Word has length 59 [2022-07-21 17:29:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:55,983 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 364 transitions. [2022-07-21 17:29:55,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:29:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 364 transitions. [2022-07-21 17:29:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 17:29:55,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:55,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:56,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:56,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:56,193 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:29:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:56,194 INFO L85 PathProgramCache]: Analyzing trace with hash -122236954, now seen corresponding path program 1 times [2022-07-21 17:29:56,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:56,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53858959] [2022-07-21 17:29:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:29:56,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:56,195 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:56,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-21 17:29:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:29:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 17:29:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:56,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-21 17:29:56,828 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 11 treesize of output 7 [2022-07-21 17:29:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:56,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:56,981 INFO L356 Elim1Store]: treesize reduction 1, result has 95.2 percent of original size [2022-07-21 17:29:56,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 46 [2022-07-21 17:29:57,578 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:29:57,580 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 1 case distinctions, treesize of input 78 treesize of output 70 [2022-07-21 17:29:57,738 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:29:57,738 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 1 case distinctions, treesize of input 78 treesize of output 70 [2022-07-21 17:30:08,220 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 82 treesize of output 54 [2022-07-21 17:30:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:10,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:30:10,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:30:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53858959] [2022-07-21 17:30:10,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53858959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:10,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:10,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 17:30:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463938872] [2022-07-21 17:30:10,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:10,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:30:10,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:30:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:30:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=395, Unknown=5, NotChecked=0, Total=462 [2022-07-21 17:30:10,584 INFO L87 Difference]: Start difference. First operand 324 states and 364 transitions. Second operand has 22 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:30:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:25,756 INFO L93 Difference]: Finished difference Result 329 states and 368 transitions. [2022-07-21 17:30:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:30:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 60 [2022-07-21 17:30:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:25,757 INFO L225 Difference]: With dead ends: 329 [2022-07-21 17:30:25,757 INFO L226 Difference]: Without dead ends: 301 [2022-07-21 17:30:25,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=85, Invalid=555, Unknown=10, NotChecked=0, Total=650 [2022-07-21 17:30:25,757 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 36 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 930 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:25,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1837 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 470 Invalid, 0 Unknown, 930 Unchecked, 0.7s Time] [2022-07-21 17:30:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-07-21 17:30:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-07-21 17:30:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 229 states have (on average 1.3799126637554586) internal successors, (316), 280 states have internal predecessors, (316), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-21 17:30:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 339 transitions. [2022-07-21 17:30:25,761 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 339 transitions. Word has length 60 [2022-07-21 17:30:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:25,761 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 339 transitions. [2022-07-21 17:30:25,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:30:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 339 transitions. [2022-07-21 17:30:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:30:25,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:25,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:25,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-21 17:30:25,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:30:25,979 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:30:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1397148172, now seen corresponding path program 1 times [2022-07-21 17:30:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:30:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764373872] [2022-07-21 17:30:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:25,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:30:25,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:30:25,981 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:30:25,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-21 17:30:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:30:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:30:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:30:26,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:30:26,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:30:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764373872] [2022-07-21 17:30:26,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764373872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:26,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:26,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:30:26,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558133824] [2022-07-21 17:30:26,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:26,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:30:26,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:30:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:30:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:30:26,779 INFO L87 Difference]: Start difference. First operand 301 states and 339 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:30:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:26,784 INFO L93 Difference]: Finished difference Result 300 states and 337 transitions. [2022-07-21 17:30:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:30:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-07-21 17:30:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:26,785 INFO L225 Difference]: With dead ends: 300 [2022-07-21 17:30:26,786 INFO L226 Difference]: Without dead ends: 300 [2022-07-21 17:30:26,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:30:26,786 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 103 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:26,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 727 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 75 Unchecked, 0.0s Time] [2022-07-21 17:30:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-21 17:30:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-07-21 17:30:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 229 states have (on average 1.3711790393013101) internal successors, (314), 279 states have internal predecessors, (314), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-21 17:30:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 337 transitions. [2022-07-21 17:30:26,803 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 337 transitions. Word has length 59 [2022-07-21 17:30:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:26,804 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 337 transitions. [2022-07-21 17:30:26,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:30:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 337 transitions. [2022-07-21 17:30:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 17:30:26,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:26,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:26,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-21 17:30:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:30:27,015 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2022-07-21 17:30:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1820164861, now seen corresponding path program 1 times [2022-07-21 17:30:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:30:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776486855] [2022-07-21 17:30:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:27,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:30:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:30:27,018 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:30:27,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-21 17:30:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 17:30:27,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:30:27,622 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:30:27,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-21 17:30:27,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:30:27,889 INFO L356 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2022-07-21 17:30:27,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 49 [2022-07-21 17:30:27,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-21 17:30:28,137 INFO L356 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-07-21 17:30:28,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 37 [2022-07-21 17:30:28,425 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:30:28,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-21 17:30:28,457 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 30 treesize of output 22 [2022-07-21 17:30:29,462 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:30:29,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 71 [2022-07-21 17:30:29,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:30:29,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776486855] [2022-07-21 17:30:29,468 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-21 17:30:29,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-21 17:30:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:30:29,680 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-21 17:30:29,684 INFO L158 Benchmark]: Toolchain (without parser) took 130899.35ms. Allocated memory was 56.6MB in the beginning and 174.1MB in the end (delta: 117.4MB). Free memory was 33.8MB in the beginning and 100.4MB in the end (delta: -66.6MB). Peak memory consumption was 52.7MB. Max. memory is 16.1GB. [2022-07-21 17:30:29,684 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory was 38.6MB in the beginning and 38.5MB in the end (delta: 81.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:30:29,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 616.42ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 33.5MB in the beginning and 57.1MB in the end (delta: -23.6MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2022-07-21 17:30:29,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.71ms. Allocated memory is still 77.6MB. Free memory was 57.1MB in the beginning and 53.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 17:30:29,684 INFO L158 Benchmark]: Boogie Preprocessor took 26.78ms. Allocated memory is still 77.6MB. Free memory was 53.9MB in the beginning and 51.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:30:29,684 INFO L158 Benchmark]: RCFGBuilder took 733.59ms. Allocated memory is still 77.6MB. Free memory was 51.2MB in the beginning and 35.3MB in the end (delta: 15.9MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2022-07-21 17:30:29,684 INFO L158 Benchmark]: TraceAbstraction took 129471.84ms. Allocated memory was 77.6MB in the beginning and 174.1MB in the end (delta: 96.5MB). Free memory was 35.0MB in the beginning and 100.4MB in the end (delta: -65.4MB). Peak memory consumption was 32.7MB. Max. memory is 16.1GB. [2022-07-21 17:30:29,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory was 38.6MB in the beginning and 38.5MB in the end (delta: 81.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 616.42ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 33.5MB in the beginning and 57.1MB in the end (delta: -23.6MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.71ms. Allocated memory is still 77.6MB. Free memory was 57.1MB in the beginning and 53.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.78ms. Allocated memory is still 77.6MB. Free memory was 53.9MB in the beginning and 51.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 733.59ms. Allocated memory is still 77.6MB. Free memory was 51.2MB in the beginning and 35.3MB in the end (delta: 15.9MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * TraceAbstraction took 129471.84ms. Allocated memory was 77.6MB in the beginning and 174.1MB in the end (delta: 96.5MB). Free memory was 35.0MB in the beginning and 100.4MB in the end (delta: -65.4MB). Peak memory consumption was 32.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 17:30:29,733 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: ERROR: ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER