./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 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/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-?-6c24879 [2022-07-12 18:57:09,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:57:09,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:57:09,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:57:09,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:57:09,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:57:09,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:57:09,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:57:09,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:57:09,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:57:09,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:57:09,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:57:09,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:57:09,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:57:09,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:57:09,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:57:09,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:57:09,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:57:09,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:57:09,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:57:09,884 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:57:09,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:57:09,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:57:09,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:57:09,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:57:09,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:57:09,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:57:09,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:57:09,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:57:09,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:57:09,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:57:09,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:57:09,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:57:09,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:57:09,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:57:09,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:57:09,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:57:09,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:57:09,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:57:09,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:57:09,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:57:09,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:57:09,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:57:09,923 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:57:09,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:57:09,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:57:09,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:57:09,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:57:09,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:57:09,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:57:09,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:57:09,925 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:57:09,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:57:09,926 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:57:09,926 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:57:09,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:57:09,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:57:09,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:57:09,927 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:57:09,927 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:57:09,927 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:57:09,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:57:09,927 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:57:09,928 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:57:09,928 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:57:09,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:57:09,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:57:09,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:57:09,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:57:09,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:57:09,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:57:09,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:57:09,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:57:09,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03499c01c9320e6c56c78c984f54a0b0b3f62caee089ccaa631f137e86019454 [2022-07-12 18:57:10,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:57:10,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:57:10,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:57:10,163 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:57:10,163 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:57:10,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-12 18:57:10,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df636fa6/1c3ddc358b944b77a7a178ab8c311cc5/FLAGf69c7b0de [2022-07-12 18:57:10,658 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:57:10,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-12 18:57:10,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df636fa6/1c3ddc358b944b77a7a178ab8c311cc5/FLAGf69c7b0de [2022-07-12 18:57:10,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df636fa6/1c3ddc358b944b77a7a178ab8c311cc5 [2022-07-12 18:57:10,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:57:10,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:57:10,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:57:10,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:57:10,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:57:10,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:57:10" (1/1) ... [2022-07-12 18:57:10,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b516fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:10, skipping insertion in model container [2022-07-12 18:57:10,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:57:10" (1/1) ... [2022-07-12 18:57:10,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:57:10,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:57:11,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:57:11,084 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) [2022-07-12 18:57:11,088 INFO L158 Benchmark]: Toolchain (without parser) took 394.37ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 86.3MB in the end (delta: -5.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:57:11,089 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 38.7MB in the beginning and 38.6MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:57:11,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 392.75ms. Allocated memory is still 115.3MB. Free memory was 81.0MB in the beginning and 86.3MB in the end (delta: -5.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:57:11,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 38.7MB in the beginning and 38.6MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 392.75ms. Allocated memory is still 115.3MB. Free memory was 81.0MB in the beginning and 86.3MB in the end (delta: -5.2MB). 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-?-6c24879 [2022-07-12 18:57:12,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:57:12,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:57:12,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:57:12,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:57:12,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:57:12,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:57:12,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:57:12,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:57:12,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:57:12,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:57:12,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:57:12,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:57:12,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:57:12,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:57:12,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:57:12,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:57:12,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:57:12,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:57:12,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:57:12,612 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:57:12,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:57:12,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:57:12,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:57:12,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:57:12,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:57:12,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:57:12,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:57:12,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:57:12,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:57:12,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:57:12,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:57:12,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:57:12,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:57:12,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:57:12,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:57:12,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:57:12,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:57:12,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:57:12,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:57:12,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:57:12,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:57:12,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:57:12,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:57:12,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:57:12,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:57:12,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:57:12,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:57:12,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:57:12,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:57:12,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:57:12,663 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:57:12,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:57:12,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:57:12,664 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:57:12,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:57:12,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:57:12,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:57:12,665 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:57:12,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:57:12,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:57:12,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:57:12,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:57:12,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:57:12,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:57:12,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:57:12,667 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:57:12,667 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:57:12,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:57:12,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03499c01c9320e6c56c78c984f54a0b0b3f62caee089ccaa631f137e86019454 [2022-07-12 18:57:12,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:57:12,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:57:12,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:57:12,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:57:12,937 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:57:12,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-12 18:57:12,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3a60ff1/cb80d05c9aca40c796b95fc9066a5987/FLAGdb17f88cc [2022-07-12 18:57:13,449 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:57:13,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_1.i [2022-07-12 18:57:13,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3a60ff1/cb80d05c9aca40c796b95fc9066a5987/FLAGdb17f88cc [2022-07-12 18:57:13,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3a60ff1/cb80d05c9aca40c796b95fc9066a5987 [2022-07-12 18:57:13,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:57:13,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:57:13,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:57:13,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:57:13,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:57:13,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:57:13" (1/1) ... [2022-07-12 18:57:13,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ebdf2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:13, skipping insertion in model container [2022-07-12 18:57:13,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:57:13" (1/1) ... [2022-07-12 18:57:13,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:57:13,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:57:14,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:57:14,099 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:57:14,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:57:14,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:57:14,191 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:57:14,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:57:14,274 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:57:14,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14 WrapperNode [2022-07-12 18:57:14,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:57:14,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:57:14,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:57:14,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:57:14,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,332 INFO L137 Inliner]: procedures = 175, calls = 119, calls flagged for inlining = 30, calls inlined = 15, statements flattened = 198 [2022-07-12 18:57:14,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:57:14,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:57:14,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:57:14,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:57:14,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:57:14,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:57:14,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:57:14,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:57:14,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (1/1) ... [2022-07-12 18:57:14,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:57:14,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:57:14,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:57:14,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:57:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 18:57:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-07-12 18:57:14,444 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-07-12 18:57:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-12 18:57:14,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-12 18:57:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 18:57:14,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 18:57:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:57:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:57:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure free_reports [2022-07-12 18:57:14,446 INFO L138 BoogieDeclarations]: Found implementation of procedure free_reports [2022-07-12 18:57:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:57:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:57:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:57:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 18:57:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:57:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:57:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-07-12 18:57:14,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-07-12 18:57:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-12 18:57:14,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-12 18:57:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:57:14,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:57:14,596 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:57:14,598 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:57:15,200 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:57:15,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:57:15,206 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:57:15,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:57:15 BoogieIcfgContainer [2022-07-12 18:57:15,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:57:15,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:57:15,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:57:15,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:57:15,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:57:13" (1/3) ... [2022-07-12 18:57:15,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520c3bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:57:15, skipping insertion in model container [2022-07-12 18:57:15,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:57:14" (2/3) ... [2022-07-12 18:57:15,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520c3bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:57:15, skipping insertion in model container [2022-07-12 18:57:15,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:57:15" (3/3) ... [2022-07-12 18:57:15,213 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test23_1.i [2022-07-12 18:57:15,223 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:57:15,223 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 79 error locations. [2022-07-12 18:57:15,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:57:15,258 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@53c62c61, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@75b7849a [2022-07-12 18:57:15,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2022-07-12 18:57:15,261 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) [2022-07-12 18:57:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:57:15,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:15,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:15,267 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)] === [2022-07-12 18:57:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:15,271 INFO L85 PathProgramCache]: Analyzing trace with hash 441980658, now seen corresponding path program 1 times [2022-07-12 18:57:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924082745] [2022-07-12 18:57:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:15,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:15,281 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) [2022-07-12 18:57:15,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:57:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:15,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:57:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:15,437 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 [2022-07-12 18:57:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:15,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:15,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:15,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924082745] [2022-07-12 18:57:15,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924082745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:15,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:15,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:15,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432033188] [2022-07-12 18:57:15,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:15,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:57:15,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:57:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:57:15,499 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) [2022-07-12 18:57:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:16,024 INFO L93 Difference]: Finished difference Result 232 states and 249 transitions. [2022-07-12 18:57:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:57:16,026 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 [2022-07-12 18:57:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:16,036 INFO L225 Difference]: With dead ends: 232 [2022-07-12 18:57:16,038 INFO L226 Difference]: Without dead ends: 228 [2022-07-12 18:57:16,040 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 [2022-07-12 18:57:16,044 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 [2022-07-12 18:57:16,045 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] [2022-07-12 18:57:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-12 18:57:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2022-07-12 18:57:16,106 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) [2022-07-12 18:57:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 229 transitions. [2022-07-12 18:57:16,110 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 229 transitions. Word has length 12 [2022-07-12 18:57:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:16,110 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 229 transitions. [2022-07-12 18:57:16,111 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) [2022-07-12 18:57:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 229 transitions. [2022-07-12 18:57:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:57:16,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:16,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:16,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:16,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:16,318 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)] === [2022-07-12 18:57:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 441980659, now seen corresponding path program 1 times [2022-07-12 18:57:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:16,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921210969] [2022-07-12 18:57:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:16,321 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) [2022-07-12 18:57:16,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:57:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:57:16,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:16,406 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 [2022-07-12 18:57:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:16,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:16,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921210969] [2022-07-12 18:57:16,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921210969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:16,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:16,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:57:16,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493024796] [2022-07-12 18:57:16,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:16,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:57:16,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:57:16,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:57:16,484 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) [2022-07-12 18:57:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:17,155 INFO L93 Difference]: Finished difference Result 237 states and 253 transitions. [2022-07-12 18:57:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:57:17,156 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 [2022-07-12 18:57:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:17,157 INFO L225 Difference]: With dead ends: 237 [2022-07-12 18:57:17,157 INFO L226 Difference]: Without dead ends: 237 [2022-07-12 18:57:17,157 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 [2022-07-12 18:57:17,158 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 35 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:17,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1102 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:57:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-12 18:57:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 212. [2022-07-12 18:57:17,166 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) [2022-07-12 18:57:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 227 transitions. [2022-07-12 18:57:17,168 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 227 transitions. Word has length 12 [2022-07-12 18:57:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:17,169 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 227 transitions. [2022-07-12 18:57:17,169 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) [2022-07-12 18:57:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 227 transitions. [2022-07-12 18:57:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:57:17,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:17,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:17,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:17,376 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)] === [2022-07-12 18:57:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:17,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2110176303, now seen corresponding path program 1 times [2022-07-12 18:57:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:17,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000563569] [2022-07-12 18:57:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:17,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:17,378 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) [2022-07-12 18:57:17,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:57:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:57:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:17,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:17,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000563569] [2022-07-12 18:57:17,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000563569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:17,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:17,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:57:17,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895594021] [2022-07-12 18:57:17,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:17,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:57:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:17,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:57:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:57:17,469 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) [2022-07-12 18:57:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:17,496 INFO L93 Difference]: Finished difference Result 224 states and 239 transitions. [2022-07-12 18:57:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:57:17,497 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 [2022-07-12 18:57:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:17,498 INFO L225 Difference]: With dead ends: 224 [2022-07-12 18:57:17,498 INFO L226 Difference]: Without dead ends: 224 [2022-07-12 18:57:17,499 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 [2022-07-12 18:57:17,499 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 [2022-07-12 18:57:17,500 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] [2022-07-12 18:57:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-12 18:57:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 203. [2022-07-12 18:57:17,506 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) [2022-07-12 18:57:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 217 transitions. [2022-07-12 18:57:17,507 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 217 transitions. Word has length 12 [2022-07-12 18:57:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:17,507 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 217 transitions. [2022-07-12 18:57:17,507 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) [2022-07-12 18:57:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 217 transitions. [2022-07-12 18:57:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:57:17,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:17,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:17,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:17,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:17,717 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)] === [2022-07-12 18:57:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash 441895411, now seen corresponding path program 1 times [2022-07-12 18:57:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:17,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566075046] [2022-07-12 18:57:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:17,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:17,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:17,722 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) [2022-07-12 18:57:17,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:57:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:57:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:17,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:17,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566075046] [2022-07-12 18:57:17,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566075046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:17,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:17,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:57:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079340150] [2022-07-12 18:57:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:57:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:57:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:57:17,794 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) [2022-07-12 18:57:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:17,828 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2022-07-12 18:57:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:57:17,829 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 [2022-07-12 18:57:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:17,829 INFO L225 Difference]: With dead ends: 224 [2022-07-12 18:57:17,829 INFO L226 Difference]: Without dead ends: 224 [2022-07-12 18:57:17,830 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 [2022-07-12 18:57:17,830 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 [2022-07-12 18:57:17,830 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] [2022-07-12 18:57:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-12 18:57:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 203. [2022-07-12 18:57:17,851 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) [2022-07-12 18:57:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 216 transitions. [2022-07-12 18:57:17,856 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 216 transitions. Word has length 12 [2022-07-12 18:57:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:17,857 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 216 transitions. [2022-07-12 18:57:17,857 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) [2022-07-12 18:57:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 216 transitions. [2022-07-12 18:57:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:57:17,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:17,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:17,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:18,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:18,065 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)] === [2022-07-12 18:57:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:18,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2110261550, now seen corresponding path program 1 times [2022-07-12 18:57:18,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:18,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724588420] [2022-07-12 18:57:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:18,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:18,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:18,067 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) [2022-07-12 18:57:18,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:57:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:18,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:57:18,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:18,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:18,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:18,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724588420] [2022-07-12 18:57:18,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724588420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:18,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:18,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:57:18,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333684503] [2022-07-12 18:57:18,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:18,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:57:18,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:18,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:57:18,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:57:18,161 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) [2022-07-12 18:57:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:18,185 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2022-07-12 18:57:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:57:18,187 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 [2022-07-12 18:57:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:18,188 INFO L225 Difference]: With dead ends: 208 [2022-07-12 18:57:18,188 INFO L226 Difference]: Without dead ends: 208 [2022-07-12 18:57:18,189 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 [2022-07-12 18:57:18,189 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 [2022-07-12 18:57:18,190 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] [2022-07-12 18:57:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-12 18:57:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2022-07-12 18:57:18,194 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) [2022-07-12 18:57:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 218 transitions. [2022-07-12 18:57:18,194 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 218 transitions. Word has length 12 [2022-07-12 18:57:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:18,195 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 218 transitions. [2022-07-12 18:57:18,195 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) [2022-07-12 18:57:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 218 transitions. [2022-07-12 18:57:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:57:18,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:18,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:18,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:18,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:18,402 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)] === [2022-07-12 18:57:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -993578524, now seen corresponding path program 1 times [2022-07-12 18:57:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:18,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794612708] [2022-07-12 18:57:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:18,404 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) [2022-07-12 18:57:18,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:57:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:57:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:18,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:18,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794612708] [2022-07-12 18:57:18,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794612708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:18,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:18,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:57:18,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530905663] [2022-07-12 18:57:18,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:18,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:57:18,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:57:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:57:18,466 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) [2022-07-12 18:57:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:18,743 INFO L93 Difference]: Finished difference Result 217 states and 232 transitions. [2022-07-12 18:57:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:57:18,743 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 [2022-07-12 18:57:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:18,744 INFO L225 Difference]: With dead ends: 217 [2022-07-12 18:57:18,744 INFO L226 Difference]: Without dead ends: 209 [2022-07-12 18:57:18,744 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 [2022-07-12 18:57:18,745 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:18,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 402 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:57:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-12 18:57:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2022-07-12 18:57:18,748 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) [2022-07-12 18:57:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 211 transitions. [2022-07-12 18:57:18,749 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 211 transitions. Word has length 13 [2022-07-12 18:57:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:18,749 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 211 transitions. [2022-07-12 18:57:18,749 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) [2022-07-12 18:57:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 211 transitions. [2022-07-12 18:57:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:57:18,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:18,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:18,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:18,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:18,950 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)] === [2022-07-12 18:57:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1907571031, now seen corresponding path program 1 times [2022-07-12 18:57:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715610850] [2022-07-12 18:57:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:18,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:18,952 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) [2022-07-12 18:57:18,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:57:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:19,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:57:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:21,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:21,162 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 [2022-07-12 18:57:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:21,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:21,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:21,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715610850] [2022-07-12 18:57:21,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715610850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:21,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:21,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:21,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120516472] [2022-07-12 18:57:21,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:21,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:57:21,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:57:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-07-12 18:57:21,245 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) [2022-07-12 18:57:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:21,749 INFO L93 Difference]: Finished difference Result 209 states and 224 transitions. [2022-07-12 18:57:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:57:21,750 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 [2022-07-12 18:57:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:21,750 INFO L225 Difference]: With dead ends: 209 [2022-07-12 18:57:21,750 INFO L226 Difference]: Without dead ends: 209 [2022-07-12 18:57:21,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2022-07-12 18:57:21,751 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 [2022-07-12 18:57:21,751 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] [2022-07-12 18:57:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-12 18:57:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2022-07-12 18:57:21,754 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) [2022-07-12 18:57:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 210 transitions. [2022-07-12 18:57:21,755 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 210 transitions. Word has length 16 [2022-07-12 18:57:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:21,755 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 210 transitions. [2022-07-12 18:57:21,755 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) [2022-07-12 18:57:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 210 transitions. [2022-07-12 18:57:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:57:21,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:21,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:21,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:21,956 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)] === [2022-07-12 18:57:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1907571030, now seen corresponding path program 1 times [2022-07-12 18:57:21,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:21,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594501596] [2022-07-12 18:57:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:21,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:21,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:21,959 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) [2022-07-12 18:57:21,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:57:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:57:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:22,103 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:57:22,103 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 [2022-07-12 18:57:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:22,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:22,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594501596] [2022-07-12 18:57:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594501596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:22,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:22,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:57:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569713736] [2022-07-12 18:57:22,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:57:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:22,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:57:22,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:57:22,145 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) [2022-07-12 18:57:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:22,653 INFO L93 Difference]: Finished difference Result 250 states and 265 transitions. [2022-07-12 18:57:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:57:22,653 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 [2022-07-12 18:57:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:22,654 INFO L225 Difference]: With dead ends: 250 [2022-07-12 18:57:22,654 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 18:57:22,654 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 [2022-07-12 18:57:22,655 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:22,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 581 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 408 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2022-07-12 18:57:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 18:57:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 208. [2022-07-12 18:57:22,659 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) [2022-07-12 18:57:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 226 transitions. [2022-07-12 18:57:22,659 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 226 transitions. Word has length 16 [2022-07-12 18:57:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:22,659 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 226 transitions. [2022-07-12 18:57:22,660 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) [2022-07-12 18:57:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 226 transitions. [2022-07-12 18:57:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:57:22,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:22,660 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] [2022-07-12 18:57:22,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:22,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:22,864 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)] === [2022-07-12 18:57:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1544157348, now seen corresponding path program 1 times [2022-07-12 18:57:22,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:22,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024287934] [2022-07-12 18:57:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:22,865 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) [2022-07-12 18:57:22,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:57:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:57:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:22,956 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 [2022-07-12 18:57:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:22,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:22,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:22,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024287934] [2022-07-12 18:57:22,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024287934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:22,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:22,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:57:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115286219] [2022-07-12 18:57:22,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:22,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:57:22,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:22,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:57:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:57:22,982 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) [2022-07-12 18:57:23,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:23,452 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2022-07-12 18:57:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:57:23,453 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 [2022-07-12 18:57:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:23,454 INFO L225 Difference]: With dead ends: 264 [2022-07-12 18:57:23,454 INFO L226 Difference]: Without dead ends: 264 [2022-07-12 18:57:23,454 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 [2022-07-12 18:57:23,454 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 71 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-07-12 18:57:23,455 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] [2022-07-12 18:57:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-12 18:57:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 236. [2022-07-12 18:57:23,458 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) [2022-07-12 18:57:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 282 transitions. [2022-07-12 18:57:23,459 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 282 transitions. Word has length 25 [2022-07-12 18:57:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:23,459 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 282 transitions. [2022-07-12 18:57:23,459 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) [2022-07-12 18:57:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 282 transitions. [2022-07-12 18:57:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:57:23,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:23,460 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] [2022-07-12 18:57:23,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:23,667 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)] === [2022-07-12 18:57:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1544157349, now seen corresponding path program 1 times [2022-07-12 18:57:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292827226] [2022-07-12 18:57:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:23,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:23,670 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) [2022-07-12 18:57:23,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:57:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:57:23,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:23,766 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 [2022-07-12 18:57:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:23,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:23,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292827226] [2022-07-12 18:57:23,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292827226] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:23,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:23,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:57:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489076640] [2022-07-12 18:57:23,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:23,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:57:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:57:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:57:23,820 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) [2022-07-12 18:57:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:24,423 INFO L93 Difference]: Finished difference Result 296 states and 325 transitions. [2022-07-12 18:57:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:57:24,424 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 [2022-07-12 18:57:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:24,425 INFO L225 Difference]: With dead ends: 296 [2022-07-12 18:57:24,425 INFO L226 Difference]: Without dead ends: 296 [2022-07-12 18:57:24,425 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 [2022-07-12 18:57:24,426 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 [2022-07-12 18:57:24,426 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] [2022-07-12 18:57:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-12 18:57:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 238. [2022-07-12 18:57:24,433 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) [2022-07-12 18:57:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 287 transitions. [2022-07-12 18:57:24,434 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 287 transitions. Word has length 25 [2022-07-12 18:57:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:24,434 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 287 transitions. [2022-07-12 18:57:24,434 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) [2022-07-12 18:57:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 287 transitions. [2022-07-12 18:57:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:57:24,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:24,435 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] [2022-07-12 18:57:24,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:24,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:24,641 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)] === [2022-07-12 18:57:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2123399988, now seen corresponding path program 1 times [2022-07-12 18:57:24,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:24,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136948208] [2022-07-12 18:57:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:24,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:24,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:24,643 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) [2022-07-12 18:57:24,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:57:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:57:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:24,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:24,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:24,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136948208] [2022-07-12 18:57:24,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136948208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:24,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:24,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:24,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883875950] [2022-07-12 18:57:24,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:24,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:57:24,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:57:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:57:24,739 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) [2022-07-12 18:57:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:24,833 INFO L93 Difference]: Finished difference Result 238 states and 286 transitions. [2022-07-12 18:57:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:57:24,835 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 [2022-07-12 18:57:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:24,836 INFO L225 Difference]: With dead ends: 238 [2022-07-12 18:57:24,836 INFO L226 Difference]: Without dead ends: 238 [2022-07-12 18:57:24,836 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 [2022-07-12 18:57:24,836 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 120 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-12 18:57:24,836 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] [2022-07-12 18:57:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-12 18:57:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-07-12 18:57:24,840 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) [2022-07-12 18:57:24,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 286 transitions. [2022-07-12 18:57:24,841 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 286 transitions. Word has length 27 [2022-07-12 18:57:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:24,841 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 286 transitions. [2022-07-12 18:57:24,841 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) [2022-07-12 18:57:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 286 transitions. [2022-07-12 18:57:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:57:24,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:24,842 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] [2022-07-12 18:57:24,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:25,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:25,042 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)] === [2022-07-12 18:57:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash -308565232, now seen corresponding path program 1 times [2022-07-12 18:57:25,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778946833] [2022-07-12 18:57:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:25,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:25,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:25,044 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) [2022-07-12 18:57:25,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:57:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:57:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:25,180 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 [2022-07-12 18:57:25,224 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:57:25,224 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 [2022-07-12 18:57:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:25,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:25,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778946833] [2022-07-12 18:57:25,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778946833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:25,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:25,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:57:25,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900429511] [2022-07-12 18:57:25,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:25,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:57:25,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:57:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:57:25,264 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) [2022-07-12 18:57:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:25,864 INFO L93 Difference]: Finished difference Result 250 states and 294 transitions. [2022-07-12 18:57:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:57:25,864 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 [2022-07-12 18:57:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:25,865 INFO L225 Difference]: With dead ends: 250 [2022-07-12 18:57:25,866 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 18:57:25,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:57:25,866 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 [2022-07-12 18:57:25,866 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] [2022-07-12 18:57:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 18:57:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2022-07-12 18:57:25,875 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) [2022-07-12 18:57:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 276 transitions. [2022-07-12 18:57:25,876 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 276 transitions. Word has length 33 [2022-07-12 18:57:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:25,877 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 276 transitions. [2022-07-12 18:57:25,877 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) [2022-07-12 18:57:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 276 transitions. [2022-07-12 18:57:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:57:25,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:25,878 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] [2022-07-12 18:57:25,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:26,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:26,085 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)] === [2022-07-12 18:57:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash -308565231, now seen corresponding path program 1 times [2022-07-12 18:57:26,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:26,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558712580] [2022-07-12 18:57:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:26,087 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) [2022-07-12 18:57:26,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 18:57:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:57:26,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:26,222 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 [2022-07-12 18:57:26,227 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 [2022-07-12 18:57:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:28,294 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 [2022-07-12 18:57:28,301 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:28,302 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 [2022-07-12 18:57:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:28,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:28,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:28,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558712580] [2022-07-12 18:57:28,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558712580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:28,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:28,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:28,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556880416] [2022-07-12 18:57:28,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:28,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:57:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:57:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2022-07-12 18:57:28,374 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) [2022-07-12 18:57:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:29,201 INFO L93 Difference]: Finished difference Result 310 states and 341 transitions. [2022-07-12 18:57:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:57:29,202 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 [2022-07-12 18:57:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:29,203 INFO L225 Difference]: With dead ends: 310 [2022-07-12 18:57:29,203 INFO L226 Difference]: Without dead ends: 310 [2022-07-12 18:57:29,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2022-07-12 18:57:29,204 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 212 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:29,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 558 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 502 Invalid, 0 Unknown, 136 Unchecked, 0.8s Time] [2022-07-12 18:57:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-07-12 18:57:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 233. [2022-07-12 18:57:29,208 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) [2022-07-12 18:57:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 271 transitions. [2022-07-12 18:57:29,209 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 271 transitions. Word has length 33 [2022-07-12 18:57:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:29,209 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 271 transitions. [2022-07-12 18:57:29,209 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) [2022-07-12 18:57:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 271 transitions. [2022-07-12 18:57:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:57:29,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:29,210 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] [2022-07-12 18:57:29,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:29,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:29,418 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)] === [2022-07-12 18:57:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1238063083, now seen corresponding path program 1 times [2022-07-12 18:57:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455513313] [2022-07-12 18:57:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:29,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:29,420 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) [2022-07-12 18:57:29,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:57:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:29,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:57:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:29,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:29,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:29,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455513313] [2022-07-12 18:57:29,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455513313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:29,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:29,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827627361] [2022-07-12 18:57:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:29,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:57:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:57:29,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:57:29,869 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) [2022-07-12 18:57:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:29,894 INFO L93 Difference]: Finished difference Result 317 states and 359 transitions. [2022-07-12 18:57:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:57:29,894 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 [2022-07-12 18:57:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:29,895 INFO L225 Difference]: With dead ends: 317 [2022-07-12 18:57:29,895 INFO L226 Difference]: Without dead ends: 317 [2022-07-12 18:57:29,896 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 [2022-07-12 18:57:29,896 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 [2022-07-12 18:57:29,896 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] [2022-07-12 18:57:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-12 18:57:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 250. [2022-07-12 18:57:29,905 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) [2022-07-12 18:57:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 289 transitions. [2022-07-12 18:57:29,906 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 289 transitions. Word has length 36 [2022-07-12 18:57:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:29,906 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 289 transitions. [2022-07-12 18:57:29,906 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) [2022-07-12 18:57:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 289 transitions. [2022-07-12 18:57:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:57:29,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:29,906 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] [2022-07-12 18:57:29,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:30,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:30,107 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)] === [2022-07-12 18:57:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1238063271, now seen corresponding path program 1 times [2022-07-12 18:57:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:30,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941119134] [2022-07-12 18:57:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:30,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:30,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:30,109 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) [2022-07-12 18:57:30,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:57:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:57:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:30,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:30,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941119134] [2022-07-12 18:57:30,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941119134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:30,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:30,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:57:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054844105] [2022-07-12 18:57:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:30,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:57:30,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:57:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:57:30,225 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) [2022-07-12 18:57:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:30,242 INFO L93 Difference]: Finished difference Result 296 states and 339 transitions. [2022-07-12 18:57:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:57:30,243 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 [2022-07-12 18:57:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:30,244 INFO L225 Difference]: With dead ends: 296 [2022-07-12 18:57:30,244 INFO L226 Difference]: Without dead ends: 296 [2022-07-12 18:57:30,244 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 [2022-07-12 18:57:30,244 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 [2022-07-12 18:57:30,245 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] [2022-07-12 18:57:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-12 18:57:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 256. [2022-07-12 18:57:30,249 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) [2022-07-12 18:57:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 295 transitions. [2022-07-12 18:57:30,250 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 295 transitions. Word has length 36 [2022-07-12 18:57:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:30,250 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 295 transitions. [2022-07-12 18:57:30,250 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) [2022-07-12 18:57:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 295 transitions. [2022-07-12 18:57:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:57:30,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:30,251 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] [2022-07-12 18:57:30,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-12 18:57:30,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:30,458 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)] === [2022-07-12 18:57:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1119933624, now seen corresponding path program 1 times [2022-07-12 18:57:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:30,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443199495] [2022-07-12 18:57:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:30,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:30,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:30,460 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) [2022-07-12 18:57:30,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:57:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:57:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:30,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:30,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443199495] [2022-07-12 18:57:30,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443199495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:30,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:30,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:57:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312935041] [2022-07-12 18:57:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:30,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:57:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:57:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:57:30,588 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) [2022-07-12 18:57:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:30,610 INFO L93 Difference]: Finished difference Result 279 states and 320 transitions. [2022-07-12 18:57:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:57:30,611 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 [2022-07-12 18:57:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:30,612 INFO L225 Difference]: With dead ends: 279 [2022-07-12 18:57:30,612 INFO L226 Difference]: Without dead ends: 279 [2022-07-12 18:57:30,612 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 [2022-07-12 18:57:30,613 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 [2022-07-12 18:57:30,613 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] [2022-07-12 18:57:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-12 18:57:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 258. [2022-07-12 18:57:30,617 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) [2022-07-12 18:57:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 297 transitions. [2022-07-12 18:57:30,618 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 297 transitions. Word has length 40 [2022-07-12 18:57:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:30,618 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 297 transitions. [2022-07-12 18:57:30,618 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) [2022-07-12 18:57:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 297 transitions. [2022-07-12 18:57:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:57:30,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:30,619 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] [2022-07-12 18:57:30,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-12 18:57:30,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:30,826 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)] === [2022-07-12 18:57:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1780653040, now seen corresponding path program 1 times [2022-07-12 18:57:30,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:30,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914150976] [2022-07-12 18:57:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:30,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:30,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:30,828 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) [2022-07-12 18:57:30,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:57:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:30,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:57:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:31,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:31,111 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 [2022-07-12 18:57:31,129 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:57:31,129 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 [2022-07-12 18:57:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:31,324 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 [2022-07-12 18:57:31,428 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:57:31,429 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 [2022-07-12 18:57:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:31,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:31,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914150976] [2022-07-12 18:57:31,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914150976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:31,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:31,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 18:57:31,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849654478] [2022-07-12 18:57:31,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:31,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:57:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:57:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:57:31,564 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) [2022-07-12 18:57:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:32,594 INFO L93 Difference]: Finished difference Result 266 states and 305 transitions. [2022-07-12 18:57:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:57:32,594 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 [2022-07-12 18:57:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:32,595 INFO L225 Difference]: With dead ends: 266 [2022-07-12 18:57:32,595 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 18:57:32,596 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 [2022-07-12 18:57:32,596 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 246 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-07-12 18:57:32,596 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] [2022-07-12 18:57:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 18:57:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2022-07-12 18:57:32,601 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) [2022-07-12 18:57:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 295 transitions. [2022-07-12 18:57:32,602 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 295 transitions. Word has length 42 [2022-07-12 18:57:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:32,602 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 295 transitions. [2022-07-12 18:57:32,602 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) [2022-07-12 18:57:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 295 transitions. [2022-07-12 18:57:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:57:32,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:32,603 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] [2022-07-12 18:57:32,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:32,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:32,812 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)] === [2022-07-12 18:57:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1780653039, now seen corresponding path program 1 times [2022-07-12 18:57:32,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:32,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467674947] [2022-07-12 18:57:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:32,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:32,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:32,814 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) [2022-07-12 18:57:32,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:57:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:57:32,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:33,034 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:33,034 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 [2022-07-12 18:57:33,171 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 18:57:33,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-12 18:57:33,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-12 18:57:33,304 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:57:33,304 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 [2022-07-12 18:57:33,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:33,640 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 18:57:33,641 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 [2022-07-12 18:57:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:33,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:33,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:33,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467674947] [2022-07-12 18:57:33,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467674947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:33,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:33,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:57:33,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400534459] [2022-07-12 18:57:33,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:33,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:57:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:57:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:57:33,799 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) [2022-07-12 18:57:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:34,338 INFO L93 Difference]: Finished difference Result 312 states and 353 transitions. [2022-07-12 18:57:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:57:34,338 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 [2022-07-12 18:57:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:34,339 INFO L225 Difference]: With dead ends: 312 [2022-07-12 18:57:34,339 INFO L226 Difference]: Without dead ends: 312 [2022-07-12 18:57:34,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:57:34,340 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 114 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:34,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1253 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 382 Invalid, 0 Unknown, 490 Unchecked, 0.4s Time] [2022-07-12 18:57:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-12 18:57:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 275. [2022-07-12 18:57:34,343 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) [2022-07-12 18:57:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 321 transitions. [2022-07-12 18:57:34,344 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 321 transitions. Word has length 42 [2022-07-12 18:57:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:34,345 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 321 transitions. [2022-07-12 18:57:34,345 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) [2022-07-12 18:57:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 321 transitions. [2022-07-12 18:57:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:57:34,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:34,345 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] [2022-07-12 18:57:34,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:34,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:34,546 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)] === [2022-07-12 18:57:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1855865600, now seen corresponding path program 1 times [2022-07-12 18:57:34,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:34,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056501853] [2022-07-12 18:57:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:34,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:34,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:34,548 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) [2022-07-12 18:57:34,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:57:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:57:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,811 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 [2022-07-12 18:57:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,846 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 [2022-07-12 18:57:34,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:34,876 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 [2022-07-12 18:57:34,961 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-12 18:57:34,961 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 [2022-07-12 18:57:34,978 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-12 18:57:34,979 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 [2022-07-12 18:57:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:34,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:34,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:34,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056501853] [2022-07-12 18:57:34,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056501853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:34,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:34,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:57:34,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061397897] [2022-07-12 18:57:34,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:34,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:57:34,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:34,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:57:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:57:34,992 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) [2022-07-12 18:57:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:35,186 INFO L93 Difference]: Finished difference Result 283 states and 329 transitions. [2022-07-12 18:57:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:57:35,187 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 [2022-07-12 18:57:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:35,188 INFO L225 Difference]: With dead ends: 283 [2022-07-12 18:57:35,188 INFO L226 Difference]: Without dead ends: 283 [2022-07-12 18:57:35,188 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 [2022-07-12 18:57:35,188 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 28 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-12 18:57:35,189 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] [2022-07-12 18:57:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-12 18:57:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 274. [2022-07-12 18:57:35,192 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) [2022-07-12 18:57:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 319 transitions. [2022-07-12 18:57:35,193 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 319 transitions. Word has length 43 [2022-07-12 18:57:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:35,194 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 319 transitions. [2022-07-12 18:57:35,194 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) [2022-07-12 18:57:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 319 transitions. [2022-07-12 18:57:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:57:35,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:35,194 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] [2022-07-12 18:57:35,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:35,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:35,395 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)] === [2022-07-12 18:57:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -634310522, now seen corresponding path program 1 times [2022-07-12 18:57:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720847082] [2022-07-12 18:57:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:35,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:35,398 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) [2022-07-12 18:57:35,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 18:57:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:57:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:35,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:35,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:35,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720847082] [2022-07-12 18:57:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720847082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:35,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:35,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:57:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106494942] [2022-07-12 18:57:35,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:35,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:57:35,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:35,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:57:35,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:57:35,524 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) [2022-07-12 18:57:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:35,540 INFO L93 Difference]: Finished difference Result 296 states and 340 transitions. [2022-07-12 18:57:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:57:35,541 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 [2022-07-12 18:57:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:35,542 INFO L225 Difference]: With dead ends: 296 [2022-07-12 18:57:35,543 INFO L226 Difference]: Without dead ends: 296 [2022-07-12 18:57:35,543 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 [2022-07-12 18:57:35,544 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 [2022-07-12 18:57:35,544 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] [2022-07-12 18:57:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-12 18:57:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 276. [2022-07-12 18:57:35,554 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) [2022-07-12 18:57:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2022-07-12 18:57:35,555 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 43 [2022-07-12 18:57:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:35,555 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2022-07-12 18:57:35,555 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) [2022-07-12 18:57:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2022-07-12 18:57:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:57:35,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:35,556 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] [2022-07-12 18:57:35,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:35,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:35,764 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)] === [2022-07-12 18:57:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1697258563, now seen corresponding path program 1 times [2022-07-12 18:57:35,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:35,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053648585] [2022-07-12 18:57:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:35,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:35,765 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) [2022-07-12 18:57:35,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:57:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:35,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:57:35,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:35,931 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 [2022-07-12 18:57:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:35,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:35,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:35,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053648585] [2022-07-12 18:57:35,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053648585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:35,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:35,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536362364] [2022-07-12 18:57:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:35,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:57:35,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:57:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:57:35,984 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) [2022-07-12 18:57:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:36,613 INFO L93 Difference]: Finished difference Result 324 states and 361 transitions. [2022-07-12 18:57:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:57:36,614 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 [2022-07-12 18:57:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:36,615 INFO L225 Difference]: With dead ends: 324 [2022-07-12 18:57:36,615 INFO L226 Difference]: Without dead ends: 324 [2022-07-12 18:57:36,615 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 [2022-07-12 18:57:36,615 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 [2022-07-12 18:57:36,616 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] [2022-07-12 18:57:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-12 18:57:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 275. [2022-07-12 18:57:36,620 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) [2022-07-12 18:57:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 317 transitions. [2022-07-12 18:57:36,622 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 317 transitions. Word has length 44 [2022-07-12 18:57:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:36,622 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 317 transitions. [2022-07-12 18:57:36,622 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) [2022-07-12 18:57:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 317 transitions. [2022-07-12 18:57:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:57:36,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:36,624 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] [2022-07-12 18:57:36,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:36,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:36,832 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)] === [2022-07-12 18:57:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:36,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1697258562, now seen corresponding path program 1 times [2022-07-12 18:57:36,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:36,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554034053] [2022-07-12 18:57:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:36,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:36,834 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) [2022-07-12 18:57:36,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 18:57:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:57:37,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:37,024 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 [2022-07-12 18:57:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:37,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:37,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:37,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554034053] [2022-07-12 18:57:37,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554034053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:37,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:37,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613639845] [2022-07-12 18:57:37,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:37,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:57:37,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:57:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:57:37,141 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) [2022-07-12 18:57:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:37,866 INFO L93 Difference]: Finished difference Result 344 states and 380 transitions. [2022-07-12 18:57:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:57:37,880 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 [2022-07-12 18:57:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:37,882 INFO L225 Difference]: With dead ends: 344 [2022-07-12 18:57:37,883 INFO L226 Difference]: Without dead ends: 344 [2022-07-12 18:57:37,883 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 [2022-07-12 18:57:37,883 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 [2022-07-12 18:57:37,884 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] [2022-07-12 18:57:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-12 18:57:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 275. [2022-07-12 18:57:37,888 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) [2022-07-12 18:57:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 315 transitions. [2022-07-12 18:57:37,889 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 315 transitions. Word has length 44 [2022-07-12 18:57:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:37,890 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 315 transitions. [2022-07-12 18:57:37,890 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) [2022-07-12 18:57:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 315 transitions. [2022-07-12 18:57:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:57:37,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:37,891 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] [2022-07-12 18:57:37,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-12 18:57:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:38,099 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)] === [2022-07-12 18:57:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash 293864698, now seen corresponding path program 1 times [2022-07-12 18:57:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005425182] [2022-07-12 18:57:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:38,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:38,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:38,101 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) [2022-07-12 18:57:38,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 18:57:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 18:57:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:38,317 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 [2022-07-12 18:57:38,426 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 [2022-07-12 18:57:38,479 INFO L356 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-07-12 18:57:38,479 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 [2022-07-12 18:57:38,520 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:57:38,521 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 [2022-07-12 18:57:38,757 INFO L356 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-07-12 18:57:38,758 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 [2022-07-12 18:57:39,053 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 42 treesize of output 38 [2022-07-12 18:57:39,224 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 [2022-07-12 18:57:39,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:39,569 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:57:39,569 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 [2022-07-12 18:57:39,687 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 [2022-07-12 18:57:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:39,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:39,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005425182] [2022-07-12 18:57:39,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005425182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:39,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:39,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 18:57:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958812132] [2022-07-12 18:57:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:57:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:57:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:57:39,762 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) [2022-07-12 18:57:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:40,591 INFO L93 Difference]: Finished difference Result 302 states and 339 transitions. [2022-07-12 18:57:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:57:40,591 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 [2022-07-12 18:57:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:40,592 INFO L225 Difference]: With dead ends: 302 [2022-07-12 18:57:40,592 INFO L226 Difference]: Without dead ends: 302 [2022-07-12 18:57:40,592 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 [2022-07-12 18:57:40,593 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 85 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:40,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1433 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 504 Unchecked, 0.6s Time] [2022-07-12 18:57:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-12 18:57:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 275. [2022-07-12 18:57:40,596 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) [2022-07-12 18:57:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 314 transitions. [2022-07-12 18:57:40,597 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 314 transitions. Word has length 45 [2022-07-12 18:57:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:40,597 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 314 transitions. [2022-07-12 18:57:40,597 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) [2022-07-12 18:57:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 314 transitions. [2022-07-12 18:57:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:57:40,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:40,598 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] [2022-07-12 18:57:40,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:40,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:40,806 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)] === [2022-07-12 18:57:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash 293864699, now seen corresponding path program 1 times [2022-07-12 18:57:40,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:40,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376164681] [2022-07-12 18:57:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:40,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:40,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:40,808 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) [2022-07-12 18:57:40,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:57:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:40,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:57:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:41,032 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 [2022-07-12 18:57:41,041 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 [2022-07-12 18:57:41,276 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 [2022-07-12 18:57:41,283 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 [2022-07-12 18:57:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:41,327 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 [2022-07-12 18:57:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:41,351 INFO L356 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-07-12 18:57:41,351 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 [2022-07-12 18:57:41,428 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:57:41,428 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 [2022-07-12 18:57:41,435 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 [2022-07-12 18:57:41,699 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-12 18:57:41,699 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 [2022-07-12 18:57:41,726 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-12 18:57:41,727 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 [2022-07-12 18:57:42,024 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 [2022-07-12 18:57:42,042 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 [2022-07-12 18:57:42,128 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 [2022-07-12 18:57:42,133 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 [2022-07-12 18:57:42,523 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 [2022-07-12 18:57:42,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:57:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:42,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:42,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:42,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376164681] [2022-07-12 18:57:42,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376164681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:42,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:42,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 18:57:42,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790371418] [2022-07-12 18:57:42,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:42,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:57:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:57:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:57:42,715 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) [2022-07-12 18:57:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:43,127 INFO L93 Difference]: Finished difference Result 276 states and 314 transitions. [2022-07-12 18:57:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:57:43,128 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 [2022-07-12 18:57:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:43,128 INFO L225 Difference]: With dead ends: 276 [2022-07-12 18:57:43,129 INFO L226 Difference]: Without dead ends: 276 [2022-07-12 18:57:43,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:57:43,129 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 [2022-07-12 18:57:43,129 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] [2022-07-12 18:57:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-12 18:57:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-07-12 18:57:43,133 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) [2022-07-12 18:57:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 313 transitions. [2022-07-12 18:57:43,133 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 313 transitions. Word has length 45 [2022-07-12 18:57:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:43,133 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 313 transitions. [2022-07-12 18:57:43,134 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) [2022-07-12 18:57:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 313 transitions. [2022-07-12 18:57:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:57:43,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:43,134 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] [2022-07-12 18:57:43,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:43,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:43,335 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)] === [2022-07-12 18:57:43,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1063867589, now seen corresponding path program 1 times [2022-07-12 18:57:43,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:43,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645122084] [2022-07-12 18:57:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:43,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:43,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:43,337 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) [2022-07-12 18:57:43,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 18:57:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 18:57:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:43,672 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-12 18:57:43,673 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 [2022-07-12 18:57:43,941 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 [2022-07-12 18:57:44,016 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:57:44,017 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 [2022-07-12 18:57:44,212 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 [2022-07-12 18:57:44,229 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 [2022-07-12 18:57:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:44,333 INFO L356 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-07-12 18:57:44,333 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 [2022-07-12 18:57:44,460 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:57:44,461 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 [2022-07-12 18:57:44,796 INFO L356 Elim1Store]: treesize reduction 13, result has 68.3 percent of original size [2022-07-12 18:57:44,796 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 [2022-07-12 18:57:45,068 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 18:57:45,069 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 [2022-07-12 18:57:45,086 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 [2022-07-12 18:57:45,175 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 18:57:45,175 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 [2022-07-12 18:57:45,182 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 [2022-07-12 18:57:45,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:57:45,924 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:57:45,925 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 [2022-07-12 18:57:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:46,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:46,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:46,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645122084] [2022-07-12 18:57:46,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645122084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:46,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:46,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-12 18:57:46,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54008263] [2022-07-12 18:57:46,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:46,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 18:57:46,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 18:57:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:57:46,111 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) [2022-07-12 18:57:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:46,715 INFO L93 Difference]: Finished difference Result 275 states and 312 transitions. [2022-07-12 18:57:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:57:46,716 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 [2022-07-12 18:57:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:46,717 INFO L225 Difference]: With dead ends: 275 [2022-07-12 18:57:46,717 INFO L226 Difference]: Without dead ends: 275 [2022-07-12 18:57:46,717 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 [2022-07-12 18:57:46,717 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 15 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-12 18:57:46,718 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] [2022-07-12 18:57:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-12 18:57:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-07-12 18:57:46,721 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) [2022-07-12 18:57:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 312 transitions. [2022-07-12 18:57:46,722 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 312 transitions. Word has length 47 [2022-07-12 18:57:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:46,722 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 312 transitions. [2022-07-12 18:57:46,722 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) [2022-07-12 18:57:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 312 transitions. [2022-07-12 18:57:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:57:46,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:46,723 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] [2022-07-12 18:57:46,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:46,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:46,932 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)] === [2022-07-12 18:57:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1063867588, now seen corresponding path program 1 times [2022-07-12 18:57:46,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:46,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092176514] [2022-07-12 18:57:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:46,934 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) [2022-07-12 18:57:46,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:57:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 18:57:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:47,219 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 [2022-07-12 18:57:47,286 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:57:47,286 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 [2022-07-12 18:57:47,509 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 [2022-07-12 18:57:47,514 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 [2022-07-12 18:57:47,609 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:57:47,609 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 [2022-07-12 18:57:47,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:47,628 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 [2022-07-12 18:57:47,846 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 [2022-07-12 18:57:47,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-12 18:57:47,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:47,958 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 [2022-07-12 18:57:47,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:47,980 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:57:47,981 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 [2022-07-12 18:57:48,091 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 [2022-07-12 18:57:48,102 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 [2022-07-12 18:57:48,427 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-12 18:57:48,427 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 [2022-07-12 18:57:48,464 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-12 18:57:48,465 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 [2022-07-12 18:57:48,913 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 18:57:48,913 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 [2022-07-12 18:57:48,920 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 [2022-07-12 18:57:49,560 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 18:57:49,561 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 [2022-07-12 18:57:49,567 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 [2022-07-12 18:57:50,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:57:50,394 INFO L356 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2022-07-12 18:57:50,394 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 [2022-07-12 18:57:50,403 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:57:50,403 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 [2022-07-12 18:57:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:50,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:50,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092176514] [2022-07-12 18:57:50,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092176514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:50,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:50,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-12 18:57:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017983950] [2022-07-12 18:57:50,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:50,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 18:57:50,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 18:57:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:57:50,588 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) [2022-07-12 18:57:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:50,915 INFO L93 Difference]: Finished difference Result 275 states and 311 transitions. [2022-07-12 18:57:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:57:50,916 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 [2022-07-12 18:57:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:50,917 INFO L225 Difference]: With dead ends: 275 [2022-07-12 18:57:50,917 INFO L226 Difference]: Without dead ends: 275 [2022-07-12 18:57:50,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:57:50,918 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:50,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1920 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 1071 Unchecked, 0.2s Time] [2022-07-12 18:57:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-12 18:57:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-07-12 18:57:50,922 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) [2022-07-12 18:57:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 311 transitions. [2022-07-12 18:57:50,922 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 311 transitions. Word has length 47 [2022-07-12 18:57:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:50,923 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 311 transitions. [2022-07-12 18:57:50,923 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) [2022-07-12 18:57:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 311 transitions. [2022-07-12 18:57:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:57:50,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:50,923 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] [2022-07-12 18:57:50,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-12 18:57:51,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:51,132 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)] === [2022-07-12 18:57:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:51,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1620254662, now seen corresponding path program 1 times [2022-07-12 18:57:51,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:51,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157063327] [2022-07-12 18:57:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:51,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:51,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:51,134 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) [2022-07-12 18:57:51,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 18:57:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:51,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 18:57:51,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:51,600 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:57:51,600 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 [2022-07-12 18:57:51,784 INFO L356 Elim1Store]: treesize reduction 29, result has 50.0 percent of original size [2022-07-12 18:57:51,784 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 [2022-07-12 18:57:51,935 INFO L356 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2022-07-12 18:57:51,936 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 [2022-07-12 18:57:52,160 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 [2022-07-12 18:57:52,440 INFO L356 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2022-07-12 18:57:52,440 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 [2022-07-12 18:57:52,647 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 [2022-07-12 18:57:52,680 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 [2022-07-12 18:57:52,748 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 [2022-07-12 18:57:52,817 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 [2022-07-12 18:57:53,184 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 [2022-07-12 18:57:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:53,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:53,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:53,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157063327] [2022-07-12 18:57:53,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157063327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:53,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:53,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-12 18:57:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61955684] [2022-07-12 18:57:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:53,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:57:53,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:57:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:57:53,579 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) [2022-07-12 18:57:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:54,000 INFO L93 Difference]: Finished difference Result 288 states and 326 transitions. [2022-07-12 18:57:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:57:54,000 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 [2022-07-12 18:57:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:54,001 INFO L225 Difference]: With dead ends: 288 [2022-07-12 18:57:54,001 INFO L226 Difference]: Without dead ends: 288 [2022-07-12 18:57:54,002 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 [2022-07-12 18:57:54,002 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 [2022-07-12 18:57:54,002 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] [2022-07-12 18:57:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-12 18:57:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 281. [2022-07-12 18:57:54,005 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) [2022-07-12 18:57:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2022-07-12 18:57:54,006 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 47 [2022-07-12 18:57:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:54,006 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2022-07-12 18:57:54,007 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) [2022-07-12 18:57:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2022-07-12 18:57:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:57:54,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:54,007 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] [2022-07-12 18:57:54,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:54,219 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)] === [2022-07-12 18:57:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1620254663, now seen corresponding path program 1 times [2022-07-12 18:57:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:54,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437362953] [2022-07-12 18:57:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:54,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:54,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:54,221 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) [2022-07-12 18:57:54,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 18:57:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:54,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-12 18:57:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:54,638 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 [2022-07-12 18:57:54,656 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:57:54,656 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 [2022-07-12 18:57:54,756 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:54,756 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 [2022-07-12 18:57:54,775 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:57:54,776 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 [2022-07-12 18:57:54,817 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:57:54,817 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 [2022-07-12 18:57:54,942 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:54,942 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 [2022-07-12 18:57:54,973 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-12 18:57:54,974 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 [2022-07-12 18:57:55,163 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 [2022-07-12 18:57:55,168 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 [2022-07-12 18:57:55,391 INFO L356 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2022-07-12 18:57:55,391 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 [2022-07-12 18:57:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:55,407 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 [2022-07-12 18:57:55,543 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:55,543 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 [2022-07-12 18:57:55,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:57:55,566 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:55,566 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 [2022-07-12 18:57:55,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:57:55,680 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:55,680 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 [2022-07-12 18:57:55,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:57:55,704 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:55,704 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 [2022-07-12 18:57:55,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:57:55,840 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:55,841 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 [2022-07-12 18:57:55,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:57:55,877 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:57:55,878 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 [2022-07-12 18:57:55,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:57:56,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:56,002 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 [2022-07-12 18:57:56,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:56,011 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 [2022-07-12 18:57:56,240 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 [2022-07-12 18:57:56,244 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 [2022-07-12 18:57:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:56,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:56,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:56,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437362953] [2022-07-12 18:57:56,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437362953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:56,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:56,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 18:57:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734439615] [2022-07-12 18:57:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:56,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:57:56,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:57:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:57:56,405 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) [2022-07-12 18:57:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:57,602 INFO L93 Difference]: Finished difference Result 288 states and 325 transitions. [2022-07-12 18:57:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:57:57,602 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 [2022-07-12 18:57:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:57,603 INFO L225 Difference]: With dead ends: 288 [2022-07-12 18:57:57,603 INFO L226 Difference]: Without dead ends: 288 [2022-07-12 18:57:57,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:57:57,604 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 85 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:57,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1355 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 711 Invalid, 0 Unknown, 626 Unchecked, 0.7s Time] [2022-07-12 18:57:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-12 18:57:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 281. [2022-07-12 18:57:57,608 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) [2022-07-12 18:57:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 317 transitions. [2022-07-12 18:57:57,608 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 317 transitions. Word has length 47 [2022-07-12 18:57:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:57,609 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 317 transitions. [2022-07-12 18:57:57,609 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) [2022-07-12 18:57:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 317 transitions. [2022-07-12 18:57:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:57:57,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:57,609 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] [2022-07-12 18:57:57,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:57,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:57,822 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)] === [2022-07-12 18:57:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash -727934890, now seen corresponding path program 1 times [2022-07-12 18:57:57,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:57,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828982077] [2022-07-12 18:57:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:57,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:57,824 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) [2022-07-12 18:57:57,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 18:57:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:57,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:57:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:57:58,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:58,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828982077] [2022-07-12 18:57:58,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828982077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:58,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:58,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:57:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638183872] [2022-07-12 18:57:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:57:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:57:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:57:58,006 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) [2022-07-12 18:57:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:58,020 INFO L93 Difference]: Finished difference Result 298 states and 332 transitions. [2022-07-12 18:57:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:57:58,021 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 [2022-07-12 18:57:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:58,022 INFO L225 Difference]: With dead ends: 298 [2022-07-12 18:57:58,022 INFO L226 Difference]: Without dead ends: 298 [2022-07-12 18:57:58,022 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 [2022-07-12 18:57:58,023 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 [2022-07-12 18:57:58,023 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] [2022-07-12 18:57:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-12 18:57:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 279. [2022-07-12 18:57:58,026 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) [2022-07-12 18:57:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 312 transitions. [2022-07-12 18:57:58,027 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 312 transitions. Word has length 49 [2022-07-12 18:57:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:58,027 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 312 transitions. [2022-07-12 18:57:58,027 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) [2022-07-12 18:57:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 312 transitions. [2022-07-12 18:57:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:57:58,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:58,028 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] [2022-07-12 18:57:58,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:58,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:58,237 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)] === [2022-07-12 18:57:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2130667900, now seen corresponding path program 1 times [2022-07-12 18:57:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:58,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795194396] [2022-07-12 18:57:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:58,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:58,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:58,239 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) [2022-07-12 18:57:58,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 18:57:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 18:57:58,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:59,014 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:57:59,015 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 [2022-07-12 18:57:59,191 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 [2022-07-12 18:57:59,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:59,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:59,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:59,243 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:57:59,243 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 [2022-07-12 18:57:59,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:59,312 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 18:57:59,312 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 [2022-07-12 18:57:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:59,538 INFO L356 Elim1Store]: treesize reduction 100, result has 36.3 percent of original size [2022-07-12 18:57:59,538 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 [2022-07-12 18:57:59,853 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-12 18:57:59,854 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 [2022-07-12 18:57:59,919 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 [2022-07-12 18:58:00,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,274 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:58:00,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 107 [2022-07-12 18:58:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:58:00,367 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 [2022-07-12 18:58:03,084 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-07-12 18:58:03,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 82 [2022-07-12 18:58:03,177 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:58:03,177 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 [2022-07-12 18:58:03,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:58:03,312 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:58:03,312 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 [2022-07-12 18:58:03,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:58:03,372 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-07-12 18:58:03,372 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 82 [2022-07-12 18:58:03,664 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-07-12 18:58:03,665 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 82 [2022-07-12 18:58:03,745 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:58:03,745 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 [2022-07-12 18:58:03,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:58:04,339 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-07-12 18:58:04,339 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 82 [2022-07-12 18:58:04,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:58:04,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795194396] [2022-07-12 18:58:04,349 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-12 18:58:04,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:58:04,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:58:04,550 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:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:611) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:529) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:269) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$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) [2022-07-12 18:58:04,553 INFO L158 Benchmark]: Toolchain (without parser) took 50750.57ms. Allocated memory was 56.6MB in the beginning and 111.1MB in the end (delta: 54.5MB). Free memory was 33.7MB in the beginning and 33.8MB in the end (delta: -90.2kB). Peak memory consumption was 54.9MB. Max. memory is 16.1GB. [2022-07-12 18:58:04,553 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 56.6MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 46.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:58:04,553 INFO L158 Benchmark]: CACSL2BoogieTranslator took 470.75ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 33.4MB in the beginning and 45.5MB in the end (delta: -12.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 18:58:04,553 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.57ms. Allocated memory is still 69.2MB. Free memory was 45.5MB in the beginning and 42.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 18:58:04,553 INFO L158 Benchmark]: Boogie Preprocessor took 46.53ms. Allocated memory is still 69.2MB. Free memory was 42.4MB in the beginning and 39.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 18:58:04,553 INFO L158 Benchmark]: RCFGBuilder took 827.12ms. Allocated memory is still 69.2MB. Free memory was 39.5MB in the beginning and 41.3MB in the end (delta: -1.7MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. [2022-07-12 18:58:04,553 INFO L158 Benchmark]: TraceAbstraction took 49343.81ms. Allocated memory was 69.2MB in the beginning and 111.1MB in the end (delta: 41.9MB). Free memory was 41.0MB in the beginning and 33.8MB in the end (delta: 7.2MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. [2022-07-12 18:58:04,554 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 56.6MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 46.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 470.75ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 33.4MB in the beginning and 45.5MB in the end (delta: -12.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.57ms. Allocated memory is still 69.2MB. Free memory was 45.5MB in the beginning and 42.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.53ms. Allocated memory is still 69.2MB. Free memory was 42.4MB in the beginning and 39.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 827.12ms. Allocated memory is still 69.2MB. Free memory was 39.5MB in the beginning and 41.3MB in the end (delta: -1.7MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. * TraceAbstraction took 49343.81ms. Allocated memory was 69.2MB in the beginning and 111.1MB in the end (delta: 41.9MB). Free memory was 41.0MB in the beginning and 33.8MB in the end (delta: 7.2MB). Peak memory consumption was 51.1MB. 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. [2022-07-12 18:58:04,584 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