./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 01:40:52,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 01:40:52,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 01:40:52,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 01:40:52,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 01:40:52,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 01:40:52,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 01:40:52,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 01:40:52,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 01:40:52,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 01:40:52,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 01:40:52,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 01:40:52,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 01:40:52,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 01:40:52,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 01:40:52,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 01:40:52,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 01:40:52,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 01:40:52,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 01:40:52,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 01:40:52,745 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 01:40:52,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 01:40:52,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 01:40:52,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 01:40:52,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 01:40:52,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 01:40:52,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 01:40:52,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 01:40:52,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 01:40:52,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 01:40:52,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 01:40:52,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 01:40:52,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 01:40:52,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 01:40:52,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 01:40:52,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 01:40:52,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 01:40:52,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 01:40:52,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 01:40:52,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 01:40:52,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 01:40:52,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 01:40:52,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-20 01:40:52,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 01:40:52,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 01:40:52,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 01:40:52,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 01:40:52,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 01:40:52,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 01:40:52,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 01:40:52,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 01:40:52,791 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 01:40:52,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 01:40:52,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 01:40:52,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 01:40:52,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 01:40:52,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 01:40:52,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 01:40:52,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 01:40:52,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 01:40:52,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 01:40:52,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 01:40:52,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 01:40:52,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 01:40:52,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 01:40:52,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 01:40:52,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 01:40:52,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 01:40:52,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 01:40:52,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 01:40:52,795 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 01:40:52,795 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 01:40:52,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 01:40:52,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a [2022-07-20 01:40:52,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 01:40:53,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 01:40:53,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 01:40:53,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 01:40:53,017 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 01:40:53,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2022-07-20 01:40:53,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622281c35/2f6d6996be00485e9f11728b070ab09f/FLAG9dfb5560a [2022-07-20 01:40:53,621 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 01:40:53,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2022-07-20 01:40:53,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622281c35/2f6d6996be00485e9f11728b070ab09f/FLAG9dfb5560a [2022-07-20 01:40:54,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622281c35/2f6d6996be00485e9f11728b070ab09f [2022-07-20 01:40:54,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 01:40:54,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 01:40:54,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 01:40:54,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 01:40:54,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 01:40:54,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:40:54" (1/1) ... [2022-07-20 01:40:54,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45dfb482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:54, skipping insertion in model container [2022-07-20 01:40:54,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:40:54" (1/1) ... [2022-07-20 01:40:54,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 01:40:54,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 01:40:55,132 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2022-07-20 01:40:55,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 01:40:55,185 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 01:40:55,305 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.AssertionError: HeapLValues must be converted to RValue before their value can be queried. at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.result.HeapLValue.getValue(HeapLValue.java:74) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.BitabsTranslation.abstractAssign(BitabsTranslation.java:517) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.abstractAssginWithBitwiseOp(IntegerTranslation.java:973) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:737) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:372) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1397) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:326) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1081) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:334) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1627) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:332) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1650) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:332) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1081) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:334) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1627) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:332) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1081) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:334) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1081) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:334) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1470) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:289) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2361) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:601) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:270) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.performMainRun(MainTranslator.java:244) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:206) 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) [2022-07-20 01:40:55,313 INFO L158 Benchmark]: Toolchain (without parser) took 1215.11ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 54.6MB in the beginning and 71.9MB in the end (delta: -17.3MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. [2022-07-20 01:40:55,313 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 49.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 01:40:55,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1199.84ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 54.3MB in the beginning and 71.9MB in the end (delta: -17.5MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. [2022-07-20 01:40:55,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 49.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1199.84ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 54.3MB in the beginning and 71.9MB in the end (delta: -17.5MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: AssertionError: HeapLValues must be converted to RValue before their value can be queried. de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: AssertionError: HeapLValues must be converted to RValue before their value can be queried.: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.result.HeapLValue.getValue(HeapLValue.java:74) 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/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 01:40:56,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 01:40:56,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 01:40:56,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 01:40:56,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 01:40:56,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 01:40:56,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 01:40:56,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 01:40:56,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 01:40:56,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 01:40:56,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 01:40:56,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 01:40:56,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 01:40:56,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 01:40:56,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 01:40:56,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 01:40:56,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 01:40:56,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 01:40:56,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 01:40:56,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 01:40:56,901 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 01:40:56,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 01:40:56,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 01:40:56,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 01:40:56,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 01:40:56,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 01:40:56,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 01:40:56,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 01:40:56,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 01:40:56,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 01:40:56,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 01:40:56,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 01:40:56,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 01:40:56,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 01:40:56,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 01:40:56,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 01:40:56,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 01:40:56,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 01:40:56,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 01:40:56,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 01:40:56,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 01:40:56,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 01:40:56,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-07-20 01:40:56,951 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 01:40:56,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 01:40:56,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 01:40:56,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 01:40:56,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 01:40:56,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 01:40:56,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 01:40:56,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 01:40:56,953 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 01:40:56,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 01:40:56,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 01:40:56,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 01:40:56,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 01:40:56,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 01:40:56,955 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 01:40:56,955 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 01:40:56,955 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 01:40:56,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 01:40:56,955 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 01:40:56,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 01:40:56,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 01:40:56,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 01:40:56,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 01:40:56,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 01:40:56,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 01:40:56,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 01:40:56,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 01:40:56,957 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 01:40:56,957 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 01:40:56,957 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 01:40:56,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 01:40:56,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 01:40:56,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 01:40:56,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a [2022-07-20 01:40:57,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 01:40:57,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 01:40:57,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 01:40:57,239 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 01:40:57,239 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 01:40:57,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2022-07-20 01:40:57,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edf0b765f/00fee65a5caa4996b78734188ae8f939/FLAG81539f3c0 [2022-07-20 01:40:57,886 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 01:40:57,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2022-07-20 01:40:57,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edf0b765f/00fee65a5caa4996b78734188ae8f939/FLAG81539f3c0 [2022-07-20 01:40:58,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edf0b765f/00fee65a5caa4996b78734188ae8f939 [2022-07-20 01:40:58,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 01:40:58,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 01:40:58,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 01:40:58,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 01:40:58,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 01:40:58,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:40:58" (1/1) ... [2022-07-20 01:40:58,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57902f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:58, skipping insertion in model container [2022-07-20 01:40:58,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:40:58" (1/1) ... [2022-07-20 01:40:58,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 01:40:58,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 01:40:59,151 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2022-07-20 01:40:59,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 01:40:59,235 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-20 01:40:59,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 01:40:59,459 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2022-07-20 01:40:59,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 01:40:59,490 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 01:40:59,743 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2022-07-20 01:40:59,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 01:40:59,815 INFO L208 MainTranslator]: Completed translation [2022-07-20 01:40:59,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59 WrapperNode [2022-07-20 01:40:59,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 01:40:59,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 01:40:59,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 01:40:59,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 01:40:59,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:40:59,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:40:59,983 INFO L137 Inliner]: procedures = 220, calls = 1417, calls flagged for inlining = 89, calls inlined = 83, statements flattened = 3216 [2022-07-20 01:40:59,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 01:40:59,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 01:40:59,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 01:40:59,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 01:40:59,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:40:59,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:41:00,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:41:00,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:41:00,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:41:00,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:41:00,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:41:00,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 01:41:00,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 01:41:00,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 01:41:00,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 01:41:00,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (1/1) ... [2022-07-20 01:41:00,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 01:41:00,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 01:41:00,208 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) [2022-07-20 01:41:00,215 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 [2022-07-20 01:41:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-20 01:41:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-07-20 01:41:00,242 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-07-20 01:41:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-07-20 01:41:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure uas_zap_pending [2022-07-20 01:41:00,242 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_zap_pending [2022-07-20 01:41:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 01:41:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-20 01:41:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-07-20 01:41:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-20 01:41:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-20 01:41:00,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-20 01:41:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-07-20 01:41:00,243 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-07-20 01:41:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2022-07-20 01:41:00,243 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2022-07-20 01:41:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure uas_alloc_data_urb [2022-07-20 01:41:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_alloc_data_urb [2022-07-20 01:41:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-07-20 01:41:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-07-20 01:41:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-20 01:41:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-20 01:41:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-07-20 01:41:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-07-20 01:41:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-07-20 01:41:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-07-20 01:41:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-20 01:41:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-20 01:41:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure uas_add_work [2022-07-20 01:41:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_add_work [2022-07-20 01:41:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_scsi_host_template_3 [2022-07-20 01:41:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_scsi_host_template_3 [2022-07-20 01:41:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-20 01:41:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-20 01:41:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 01:41:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 01:41:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure uas_find_endpoints [2022-07-20 01:41:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_find_endpoints [2022-07-20 01:41:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-20 01:41:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-20 01:41:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure uas_log_cmd_state [2022-07-20 01:41:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_log_cmd_state [2022-07-20 01:41:00,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 01:41:00,247 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-20 01:41:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-20 01:41:00,247 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2022-07-20 01:41:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2022-07-20 01:41:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_urb [2022-07-20 01:41:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_urb [2022-07-20 01:41:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 01:41:00,249 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2022-07-20 01:41:00,249 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2022-07-20 01:41:00,249 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2022-07-20 01:41:00,249 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2022-07-20 01:41:00,249 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-20 01:41:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-20 01:41:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure uas_xfer_data [2022-07-20 01:41:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_xfer_data [2022-07-20 01:41:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-07-20 01:41:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-07-20 01:41:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wait_anchor_empty_timeout [2022-07-20 01:41:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wait_anchor_empty_timeout [2022-07-20 01:41:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-07-20 01:41:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-20 01:41:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-07-20 01:41:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 01:41:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 01:41:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 01:41:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-07-20 01:41:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 01:41:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-20 01:41:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-07-20 01:41:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure uas_try_complete [2022-07-20 01:41:00,252 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_try_complete [2022-07-20 01:41:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_report_bus_reset [2022-07-20 01:41:00,252 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_report_bus_reset [2022-07-20 01:41:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-07-20 01:41:00,253 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-07-20 01:41:00,253 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-07-20 01:41:00,253 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-07-20 01:41:00,253 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-07-20 01:41:00,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-07-20 01:41:00,253 INFO L130 BoogieDeclarations]: Found specification of procedure uas_wait_for_pending_cmnds [2022-07-20 01:41:00,253 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_wait_for_pending_cmnds [2022-07-20 01:41:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-07-20 01:41:00,254 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-07-20 01:41:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-07-20 01:41:00,254 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-07-20 01:41:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure uas_data_cmplt [2022-07-20 01:41:00,255 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_data_cmplt [2022-07-20 01:41:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-07-20 01:41:00,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-07-20 01:41:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2022-07-20 01:41:00,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2022-07-20 01:41:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure uas_shutdown [2022-07-20 01:41:00,256 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_shutdown [2022-07-20 01:41:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure uas_do_work [2022-07-20 01:41:00,256 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_do_work [2022-07-20 01:41:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-20 01:41:00,256 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-20 01:41:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-07-20 01:41:00,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-07-20 01:41:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-07-20 01:41:00,257 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-07-20 01:41:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-07-20 01:41:00,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-07-20 01:41:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure uas_disconnect [2022-07-20 01:41:00,257 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_disconnect [2022-07-20 01:41:00,258 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-07-20 01:41:00,258 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-07-20 01:41:00,258 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-07-20 01:41:00,259 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-07-20 01:41:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure usb_pipe_endpoint [2022-07-20 01:41:00,260 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_pipe_endpoint [2022-07-20 01:41:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_out [2022-07-20 01:41:00,260 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_out [2022-07-20 01:41:00,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-20 01:41:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-07-20 01:41:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-07-20 01:41:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-07-20 01:41:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-20 01:41:00,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-20 01:41:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-07-20 01:41:00,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-07-20 01:41:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure uas_stat_cmplt [2022-07-20 01:41:00,267 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_stat_cmplt [2022-07-20 01:41:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 01:41:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 01:41:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 01:41:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-07-20 01:41:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-07-20 01:41:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-07-20 01:41:00,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-07-20 01:41:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-07-20 01:41:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_host_put [2022-07-20 01:41:00,268 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_host_put [2022-07-20 01:41:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure uas_configure_endpoints [2022-07-20 01:41:00,268 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_configure_endpoints [2022-07-20 01:41:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-07-20 01:41:00,268 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-07-20 01:41:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure uas_free_unsubmitted_urbs [2022-07-20 01:41:00,268 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_free_unsubmitted_urbs [2022-07-20 01:41:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure uas_find_uas_alt_setting [2022-07-20 01:41:00,268 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_find_uas_alt_setting [2022-07-20 01:41:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-07-20 01:41:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-07-20 01:41:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_in [2022-07-20 01:41:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_in [2022-07-20 01:41:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-20 01:41:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-20 01:41:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure lock_is_held [2022-07-20 01:41:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_is_held [2022-07-20 01:41:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure uas_submit_urbs [2022-07-20 01:41:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_submit_urbs [2022-07-20 01:41:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure usb_reset_device [2022-07-20 01:41:00,270 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_reset_device [2022-07-20 01:41:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_max_hw_sectors [2022-07-20 01:41:00,270 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_max_hw_sectors [2022-07-20 01:41:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-07-20 01:41:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure uas_free_streams [2022-07-20 01:41:00,270 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_free_streams [2022-07-20 01:41:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-07-20 01:41:00,270 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-07-20 01:41:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 01:41:00,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 01:41:00,823 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 01:41:00,826 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 01:41:01,325 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-20 01:41:13,247 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 01:41:13,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 01:41:13,269 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-20 01:41:13,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:41:13 BoogieIcfgContainer [2022-07-20 01:41:13,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 01:41:13,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 01:41:13,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 01:41:13,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 01:41:13,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:40:58" (1/3) ... [2022-07-20 01:41:13,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a3d311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:41:13, skipping insertion in model container [2022-07-20 01:41:13,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:40:59" (2/3) ... [2022-07-20 01:41:13,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a3d311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:41:13, skipping insertion in model container [2022-07-20 01:41:13,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:41:13" (3/3) ... [2022-07-20 01:41:13,280 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2022-07-20 01:41:13,291 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 01:41:13,291 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 01:41:13,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 01:41:13,349 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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@6955a628, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ffe8aed [2022-07-20 01:41:13,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 01:41:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 1052 states, 741 states have (on average 1.3454790823211875) internal successors, (997), 774 states have internal predecessors, (997), 243 states have call successors, (243), 67 states have call predecessors, (243), 66 states have return successors, (238), 230 states have call predecessors, (238), 238 states have call successors, (238) [2022-07-20 01:41:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-20 01:41:13,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:13,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:13,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:13,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:13,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1866951613, now seen corresponding path program 1 times [2022-07-20 01:41:13,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363932202] [2022-07-20 01:41:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:13,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:13,399 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) [2022-07-20 01:41:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 01:41:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 01:41:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 01:41:14,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:14,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363932202] [2022-07-20 01:41:14,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363932202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:14,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:14,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 01:41:14,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617821422] [2022-07-20 01:41:14,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:14,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 01:41:14,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 01:41:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:14,535 INFO L87 Difference]: Start difference. First operand has 1052 states, 741 states have (on average 1.3454790823211875) internal successors, (997), 774 states have internal predecessors, (997), 243 states have call successors, (243), 67 states have call predecessors, (243), 66 states have return successors, (238), 230 states have call predecessors, (238), 238 states have call successors, (238) Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-20 01:41:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:14,772 INFO L93 Difference]: Finished difference Result 2102 states and 3025 transitions. [2022-07-20 01:41:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 01:41:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 98 [2022-07-20 01:41:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:14,825 INFO L225 Difference]: With dead ends: 2102 [2022-07-20 01:41:14,831 INFO L226 Difference]: Without dead ends: 1037 [2022-07-20 01:41:14,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 01:41:14,843 INFO L413 NwaCegarLoop]: 1472 mSDtfsCounter, 346 mSDsluCounter, 3991 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 5463 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:14,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 5463 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 01:41:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-07-20 01:41:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2022-07-20 01:41:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 733 states have (on average 1.3369713506139154) internal successors, (980), 759 states have internal predecessors, (980), 238 states have call successors, (238), 66 states have call predecessors, (238), 65 states have return successors, (237), 229 states have call predecessors, (237), 237 states have call successors, (237) [2022-07-20 01:41:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1455 transitions. [2022-07-20 01:41:14,931 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1455 transitions. Word has length 98 [2022-07-20 01:41:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:14,932 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1455 transitions. [2022-07-20 01:41:14,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-20 01:41:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1455 transitions. [2022-07-20 01:41:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 01:41:14,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:14,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:14,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:15,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:15,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:15,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:15,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2076110020, now seen corresponding path program 1 times [2022-07-20 01:41:15,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:15,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544938946] [2022-07-20 01:41:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:15,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:15,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:15,159 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) [2022-07-20 01:41:15,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 01:41:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:16,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 01:41:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 01:41:16,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 01:41:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 01:41:16,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544938946] [2022-07-20 01:41:16,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544938946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 01:41:16,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 01:41:16,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-07-20 01:41:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217029427] [2022-07-20 01:41:16,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 01:41:16,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 01:41:16,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 01:41:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-20 01:41:16,576 INFO L87 Difference]: Start difference. First operand 1037 states and 1455 transitions. Second operand has 9 states, 7 states have (on average 8.142857142857142) internal successors, (57), 9 states have internal predecessors, (57), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 01:41:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:16,967 INFO L93 Difference]: Finished difference Result 2067 states and 2905 transitions. [2022-07-20 01:41:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 01:41:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.142857142857142) internal successors, (57), 9 states have internal predecessors, (57), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2022-07-20 01:41:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:16,973 INFO L225 Difference]: With dead ends: 2067 [2022-07-20 01:41:16,973 INFO L226 Difference]: Without dead ends: 1038 [2022-07-20 01:41:16,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-20 01:41:16,977 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 663 mSDsluCounter, 8291 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 9743 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:16,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 9743 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 01:41:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-07-20 01:41:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2022-07-20 01:41:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 734 states have (on average 1.3365122615803815) internal successors, (981), 760 states have internal predecessors, (981), 238 states have call successors, (238), 66 states have call predecessors, (238), 65 states have return successors, (237), 229 states have call predecessors, (237), 237 states have call successors, (237) [2022-07-20 01:41:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1456 transitions. [2022-07-20 01:41:17,001 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1456 transitions. Word has length 99 [2022-07-20 01:41:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:17,002 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1456 transitions. [2022-07-20 01:41:17,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.142857142857142) internal successors, (57), 9 states have internal predecessors, (57), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 01:41:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1456 transitions. [2022-07-20 01:41:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 01:41:17,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:17,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:17,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:17,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:17,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:17,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1535666967, now seen corresponding path program 1 times [2022-07-20 01:41:17,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:17,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931281516] [2022-07-20 01:41:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:17,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:17,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:17,222 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) [2022-07-20 01:41:17,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 01:41:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:18,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 01:41:18,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 01:41:18,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 01:41:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 01:41:18,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:18,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931281516] [2022-07-20 01:41:18,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931281516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 01:41:18,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 01:41:18,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-07-20 01:41:18,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074174508] [2022-07-20 01:41:18,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 01:41:18,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 01:41:18,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 01:41:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-20 01:41:18,737 INFO L87 Difference]: Start difference. First operand 1038 states and 1456 transitions. Second operand has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 11 states have internal predecessors, (60), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 01:41:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:18,956 INFO L93 Difference]: Finished difference Result 2069 states and 2907 transitions. [2022-07-20 01:41:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 01:41:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 11 states have internal predecessors, (60), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) Word has length 101 [2022-07-20 01:41:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:18,962 INFO L225 Difference]: With dead ends: 2069 [2022-07-20 01:41:18,962 INFO L226 Difference]: Without dead ends: 1039 [2022-07-20 01:41:18,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-20 01:41:18,969 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 336 mSDsluCounter, 7888 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 9340 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:18,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 9340 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 01:41:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-07-20 01:41:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2022-07-20 01:41:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 735 states have (on average 1.3360544217687076) internal successors, (982), 761 states have internal predecessors, (982), 238 states have call successors, (238), 66 states have call predecessors, (238), 65 states have return successors, (237), 229 states have call predecessors, (237), 237 states have call successors, (237) [2022-07-20 01:41:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1457 transitions. [2022-07-20 01:41:18,996 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1457 transitions. Word has length 101 [2022-07-20 01:41:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:18,996 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 1457 transitions. [2022-07-20 01:41:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 11 states have internal predecessors, (60), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 01:41:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1457 transitions. [2022-07-20 01:41:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 01:41:19,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:19,003 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:19,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:19,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:19,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:19,205 INFO L85 PathProgramCache]: Analyzing trace with hash -892147740, now seen corresponding path program 2 times [2022-07-20 01:41:19,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:19,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192419858] [2022-07-20 01:41:19,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 01:41:19,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:19,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:19,208 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) [2022-07-20 01:41:19,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 01:41:19,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 01:41:19,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 01:41:20,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 01:41:20,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 01:41:20,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:20,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:20,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192419858] [2022-07-20 01:41:20,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192419858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:20,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:20,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 01:41:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696927782] [2022-07-20 01:41:20,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:20,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 01:41:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 01:41:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:20,080 INFO L87 Difference]: Start difference. First operand 1039 states and 1457 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:20,290 INFO L93 Difference]: Finished difference Result 3073 states and 4372 transitions. [2022-07-20 01:41:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 01:41:20,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 101 [2022-07-20 01:41:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:20,301 INFO L225 Difference]: With dead ends: 3073 [2022-07-20 01:41:20,301 INFO L226 Difference]: Without dead ends: 2047 [2022-07-20 01:41:20,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:20,307 INFO L413 NwaCegarLoop]: 1744 mSDtfsCounter, 1417 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 3201 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:20,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1417 Valid, 3201 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2022-07-20 01:41:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 2044. [2022-07-20 01:41:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1447 states have (on average 1.336558396682792) internal successors, (1934), 1499 states have internal predecessors, (1934), 469 states have call successors, (469), 131 states have call predecessors, (469), 127 states have return successors, (493), 447 states have call predecessors, (493), 468 states have call successors, (493) [2022-07-20 01:41:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2896 transitions. [2022-07-20 01:41:20,359 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2896 transitions. Word has length 101 [2022-07-20 01:41:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:20,362 INFO L495 AbstractCegarLoop]: Abstraction has 2044 states and 2896 transitions. [2022-07-20 01:41:20,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2896 transitions. [2022-07-20 01:41:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-20 01:41:20,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:20,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:20,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:20,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:20,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:20,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1799856770, now seen corresponding path program 2 times [2022-07-20 01:41:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:20,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166059865] [2022-07-20 01:41:20,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 01:41:20,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:20,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:20,599 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) [2022-07-20 01:41:20,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 01:41:21,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 01:41:21,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 01:41:21,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 01:41:21,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 01:41:21,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:21,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166059865] [2022-07-20 01:41:21,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166059865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:21,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:21,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 01:41:21,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452283416] [2022-07-20 01:41:21,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:21,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 01:41:21,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:21,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 01:41:21,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:21,538 INFO L87 Difference]: Start difference. First operand 2044 states and 2896 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:21,779 INFO L93 Difference]: Finished difference Result 5091 states and 7315 transitions. [2022-07-20 01:41:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 01:41:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 102 [2022-07-20 01:41:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:21,794 INFO L225 Difference]: With dead ends: 5091 [2022-07-20 01:41:21,794 INFO L226 Difference]: Without dead ends: 3060 [2022-07-20 01:41:21,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:21,802 INFO L413 NwaCegarLoop]: 1681 mSDtfsCounter, 1431 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:21,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 3138 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2022-07-20 01:41:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 3057. [2022-07-20 01:41:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 2166 states have (on average 1.33471837488458) internal successors, (2891), 2244 states have internal predecessors, (2891), 698 states have call successors, (698), 196 states have call predecessors, (698), 192 states have return successors, (771), 668 states have call predecessors, (771), 697 states have call successors, (771) [2022-07-20 01:41:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 4360 transitions. [2022-07-20 01:41:21,889 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 4360 transitions. Word has length 102 [2022-07-20 01:41:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:21,890 INFO L495 AbstractCegarLoop]: Abstraction has 3057 states and 4360 transitions. [2022-07-20 01:41:21,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 4360 transitions. [2022-07-20 01:41:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-20 01:41:21,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:21,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:21,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:22,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:22,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:22,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1090911955, now seen corresponding path program 1 times [2022-07-20 01:41:22,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:22,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605633683] [2022-07-20 01:41:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:22,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:22,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:22,115 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) [2022-07-20 01:41:22,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 01:41:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 01:41:23,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 01:41:23,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 01:41:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 01:41:23,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605633683] [2022-07-20 01:41:23,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605633683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 01:41:23,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 01:41:23,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-20 01:41:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891423125] [2022-07-20 01:41:23,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 01:41:23,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 01:41:23,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 01:41:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-20 01:41:23,883 INFO L87 Difference]: Start difference. First operand 3057 states and 4360 transitions. Second operand has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 01:41:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:24,193 INFO L93 Difference]: Finished difference Result 6113 states and 8731 transitions. [2022-07-20 01:41:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 01:41:24,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) Word has length 103 [2022-07-20 01:41:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:24,211 INFO L225 Difference]: With dead ends: 6113 [2022-07-20 01:41:24,211 INFO L226 Difference]: Without dead ends: 3060 [2022-07-20 01:41:24,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-07-20 01:41:24,224 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 337 mSDsluCounter, 9337 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 10789 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:24,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 10789 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2022-07-20 01:41:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 3060. [2022-07-20 01:41:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2169 states have (on average 1.334255417242969) internal successors, (2894), 2247 states have internal predecessors, (2894), 698 states have call successors, (698), 196 states have call predecessors, (698), 192 states have return successors, (771), 668 states have call predecessors, (771), 697 states have call successors, (771) [2022-07-20 01:41:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4363 transitions. [2022-07-20 01:41:24,304 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4363 transitions. Word has length 103 [2022-07-20 01:41:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:24,305 INFO L495 AbstractCegarLoop]: Abstraction has 3060 states and 4363 transitions. [2022-07-20 01:41:24,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (13), 2 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 01:41:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4363 transitions. [2022-07-20 01:41:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-20 01:41:24,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:24,308 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:24,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:24,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:24,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:24,534 INFO L85 PathProgramCache]: Analyzing trace with hash -729703118, now seen corresponding path program 1 times [2022-07-20 01:41:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928553420] [2022-07-20 01:41:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:24,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:24,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:24,537 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) [2022-07-20 01:41:24,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 01:41:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 01:41:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-20 01:41:25,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:25,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928553420] [2022-07-20 01:41:25,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928553420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:25,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:25,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 01:41:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076653817] [2022-07-20 01:41:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 01:41:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 01:41:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:25,581 INFO L87 Difference]: Start difference. First operand 3060 states and 4363 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:25,874 INFO L93 Difference]: Finished difference Result 7122 states and 10314 transitions. [2022-07-20 01:41:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 01:41:25,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 105 [2022-07-20 01:41:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:25,893 INFO L225 Difference]: With dead ends: 7122 [2022-07-20 01:41:25,893 INFO L226 Difference]: Without dead ends: 4075 [2022-07-20 01:41:25,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:25,906 INFO L413 NwaCegarLoop]: 1681 mSDtfsCounter, 1433 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:25,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1433 Valid, 3138 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2022-07-20 01:41:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4072. [2022-07-20 01:41:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 2889 states have (on average 1.332987192800277) internal successors, (3851), 2993 states have internal predecessors, (3851), 925 states have call successors, (925), 261 states have call predecessors, (925), 257 states have return successors, (1062), 887 states have call predecessors, (1062), 924 states have call successors, (1062) [2022-07-20 01:41:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 5838 transitions. [2022-07-20 01:41:26,045 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 5838 transitions. Word has length 105 [2022-07-20 01:41:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:26,046 INFO L495 AbstractCegarLoop]: Abstraction has 4072 states and 5838 transitions. [2022-07-20 01:41:26,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 5838 transitions. [2022-07-20 01:41:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-20 01:41:26,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:26,051 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:26,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:26,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:26,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash 301796486, now seen corresponding path program 2 times [2022-07-20 01:41:26,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:26,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156659078] [2022-07-20 01:41:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 01:41:26,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:26,270 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) [2022-07-20 01:41:26,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 01:41:27,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 01:41:27,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 01:41:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 01:41:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-20 01:41:27,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:27,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:27,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156659078] [2022-07-20 01:41:27,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156659078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:27,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:27,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 01:41:27,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356286274] [2022-07-20 01:41:27,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:27,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 01:41:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:27,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 01:41:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:27,174 INFO L87 Difference]: Start difference. First operand 4072 states and 5838 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:27,414 INFO L93 Difference]: Finished difference Result 9141 states and 13298 transitions. [2022-07-20 01:41:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 01:41:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-07-20 01:41:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:27,442 INFO L225 Difference]: With dead ends: 9141 [2022-07-20 01:41:27,442 INFO L226 Difference]: Without dead ends: 5082 [2022-07-20 01:41:27,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:27,459 INFO L413 NwaCegarLoop]: 1679 mSDtfsCounter, 1423 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 3134 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:27,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 3134 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 01:41:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2022-07-20 01:41:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5079. [2022-07-20 01:41:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5079 states, 3606 states have (on average 1.331392124237382) internal successors, (4801), 3736 states have internal predecessors, (4801), 1150 states have call successors, (1150), 326 states have call predecessors, (1150), 322 states have return successors, (1354), 1104 states have call predecessors, (1354), 1149 states have call successors, (1354) [2022-07-20 01:41:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5079 states to 5079 states and 7305 transitions. [2022-07-20 01:41:27,620 INFO L78 Accepts]: Start accepts. Automaton has 5079 states and 7305 transitions. Word has length 104 [2022-07-20 01:41:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:27,620 INFO L495 AbstractCegarLoop]: Abstraction has 5079 states and 7305 transitions. [2022-07-20 01:41:27,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 01:41:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5079 states and 7305 transitions. [2022-07-20 01:41:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 01:41:27,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:27,624 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:27,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:27,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:27,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:27,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1342420577, now seen corresponding path program 1 times [2022-07-20 01:41:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:27,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027608691] [2022-07-20 01:41:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:27,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:27,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:27,842 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) [2022-07-20 01:41:27,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 01:41:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:28,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 01:41:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 01:41:28,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:28,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027608691] [2022-07-20 01:41:28,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027608691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:28,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:28,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 01:41:28,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857580297] [2022-07-20 01:41:28,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:28,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 01:41:28,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 01:41:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:28,928 INFO L87 Difference]: Start difference. First operand 5079 states and 7305 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 01:41:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:29,276 INFO L93 Difference]: Finished difference Result 14616 states and 21098 transitions. [2022-07-20 01:41:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 01:41:29,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 127 [2022-07-20 01:41:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:29,328 INFO L225 Difference]: With dead ends: 14616 [2022-07-20 01:41:29,329 INFO L226 Difference]: Without dead ends: 9550 [2022-07-20 01:41:29,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:29,350 INFO L413 NwaCegarLoop]: 2277 mSDtfsCounter, 1281 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:29,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 3683 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9550 states. [2022-07-20 01:41:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9550 to 9502. [2022-07-20 01:41:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 6757 states have (on average 1.3278081989048394) internal successors, (8972), 6997 states have internal predecessors, (8972), 2120 states have call successors, (2120), 636 states have call predecessors, (2120), 624 states have return successors, (2661), 2020 states have call predecessors, (2661), 2119 states have call successors, (2661) [2022-07-20 01:41:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 13753 transitions. [2022-07-20 01:41:29,684 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 13753 transitions. Word has length 127 [2022-07-20 01:41:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:29,684 INFO L495 AbstractCegarLoop]: Abstraction has 9502 states and 13753 transitions. [2022-07-20 01:41:29,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 01:41:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 13753 transitions. [2022-07-20 01:41:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-20 01:41:29,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:29,689 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:29,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:29,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:29,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1041822185, now seen corresponding path program 1 times [2022-07-20 01:41:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:29,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575018440] [2022-07-20 01:41:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:29,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:29,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:29,907 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) [2022-07-20 01:41:29,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 01:41:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 01:41:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-20 01:41:31,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:31,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575018440] [2022-07-20 01:41:31,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575018440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:31,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:31,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 01:41:31,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570739834] [2022-07-20 01:41:31,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:31,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 01:41:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:31,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 01:41:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:31,193 INFO L87 Difference]: Start difference. First operand 9502 states and 13753 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-20 01:41:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:31,685 INFO L93 Difference]: Finished difference Result 25640 states and 37172 transitions. [2022-07-20 01:41:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 01:41:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 201 [2022-07-20 01:41:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:31,751 INFO L225 Difference]: With dead ends: 25640 [2022-07-20 01:41:31,751 INFO L226 Difference]: Without dead ends: 16151 [2022-07-20 01:41:31,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:31,782 INFO L413 NwaCegarLoop]: 2395 mSDtfsCounter, 1045 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:31,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 3802 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16151 states. [2022-07-20 01:41:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16151 to 16138. [2022-07-20 01:41:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16138 states, 11385 states have (on average 1.3246376811594203) internal successors, (15081), 11825 states have internal predecessors, (15081), 3667 states have call successors, (3667), 1108 states have call predecessors, (3667), 1085 states have return successors, (4666), 3478 states have call predecessors, (4666), 3666 states have call successors, (4666) [2022-07-20 01:41:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 23414 transitions. [2022-07-20 01:41:32,294 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 23414 transitions. Word has length 201 [2022-07-20 01:41:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:32,294 INFO L495 AbstractCegarLoop]: Abstraction has 16138 states and 23414 transitions. [2022-07-20 01:41:32,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-20 01:41:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 23414 transitions. [2022-07-20 01:41:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-20 01:41:32,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:32,300 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:32,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:32,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:32,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1443721273, now seen corresponding path program 1 times [2022-07-20 01:41:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:32,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304925483] [2022-07-20 01:41:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:32,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:32,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:32,522 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) [2022-07-20 01:41:32,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 01:41:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:34,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 2320 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 01:41:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 01:41:34,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:34,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:34,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304925483] [2022-07-20 01:41:34,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304925483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:34,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:34,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 01:41:34,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715460638] [2022-07-20 01:41:34,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:34,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 01:41:34,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 01:41:34,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 01:41:34,097 INFO L87 Difference]: Start difference. First operand 16138 states and 23414 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-20 01:41:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:34,746 INFO L93 Difference]: Finished difference Result 37228 states and 55151 transitions. [2022-07-20 01:41:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 01:41:34,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 230 [2022-07-20 01:41:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:34,822 INFO L225 Difference]: With dead ends: 37228 [2022-07-20 01:41:34,822 INFO L226 Difference]: Without dead ends: 21118 [2022-07-20 01:41:34,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:34,869 INFO L413 NwaCegarLoop]: 1906 mSDtfsCounter, 637 mSDsluCounter, 3314 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:34,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 5220 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21118 states. [2022-07-20 01:41:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21118 to 16158. [2022-07-20 01:41:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16158 states, 11405 states have (on average 1.324068391056554) internal successors, (15101), 11845 states have internal predecessors, (15101), 3667 states have call successors, (3667), 1108 states have call predecessors, (3667), 1085 states have return successors, (4666), 3478 states have call predecessors, (4666), 3666 states have call successors, (4666) [2022-07-20 01:41:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16158 states to 16158 states and 23434 transitions. [2022-07-20 01:41:35,427 INFO L78 Accepts]: Start accepts. Automaton has 16158 states and 23434 transitions. Word has length 230 [2022-07-20 01:41:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:35,428 INFO L495 AbstractCegarLoop]: Abstraction has 16158 states and 23434 transitions. [2022-07-20 01:41:35,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-20 01:41:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 16158 states and 23434 transitions. [2022-07-20 01:41:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-20 01:41:35,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:35,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:35,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:35,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:35,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash 928652469, now seen corresponding path program 1 times [2022-07-20 01:41:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:35,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434675701] [2022-07-20 01:41:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:35,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:35,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:35,650 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) [2022-07-20 01:41:35,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 01:41:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 01:41:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-20 01:41:37,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:37,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434675701] [2022-07-20 01:41:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434675701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:37,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 01:41:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739920335] [2022-07-20 01:41:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:37,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 01:41:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 01:41:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:37,119 INFO L87 Difference]: Start difference. First operand 16158 states and 23434 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-07-20 01:41:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:37,875 INFO L93 Difference]: Finished difference Result 39572 states and 57462 transitions. [2022-07-20 01:41:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 01:41:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 246 [2022-07-20 01:41:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:38,012 INFO L225 Difference]: With dead ends: 39572 [2022-07-20 01:41:38,012 INFO L226 Difference]: Without dead ends: 23442 [2022-07-20 01:41:38,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 01:41:38,068 INFO L413 NwaCegarLoop]: 2471 mSDtfsCounter, 1288 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 3695 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:38,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 3695 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 01:41:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23442 states. [2022-07-20 01:41:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23442 to 23429. [2022-07-20 01:41:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23429 states, 16542 states have (on average 1.323177366702938) internal successors, (21888), 17182 states have internal predecessors, (21888), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1584 states have return successors, (6759), 5024 states have call predecessors, (6759), 5301 states have call successors, (6759) [2022-07-20 01:41:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23429 states to 23429 states and 33949 transitions. [2022-07-20 01:41:38,838 INFO L78 Accepts]: Start accepts. Automaton has 23429 states and 33949 transitions. Word has length 246 [2022-07-20 01:41:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:38,839 INFO L495 AbstractCegarLoop]: Abstraction has 23429 states and 33949 transitions. [2022-07-20 01:41:38,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-07-20 01:41:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 23429 states and 33949 transitions. [2022-07-20 01:41:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-20 01:41:38,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:38,847 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:38,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:39,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:39,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash -812641372, now seen corresponding path program 1 times [2022-07-20 01:41:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:39,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680594642] [2022-07-20 01:41:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:39,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:39,071 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) [2022-07-20 01:41:39,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 01:41:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:40,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 01:41:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 01:41:40,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:40,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680594642] [2022-07-20 01:41:40,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680594642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:40,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:40,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 01:41:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912316741] [2022-07-20 01:41:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:40,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 01:41:40,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:40,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 01:41:40,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:40,827 INFO L87 Difference]: Start difference. First operand 23429 states and 33949 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:41:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:41,593 INFO L93 Difference]: Finished difference Result 50505 states and 73946 transitions. [2022-07-20 01:41:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 01:41:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 253 [2022-07-20 01:41:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:41,707 INFO L225 Difference]: With dead ends: 50505 [2022-07-20 01:41:41,707 INFO L226 Difference]: Without dead ends: 27104 [2022-07-20 01:41:41,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:41,792 INFO L413 NwaCegarLoop]: 1748 mSDtfsCounter, 235 mSDsluCounter, 4981 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 6729 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:41,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 6729 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 01:41:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27104 states. [2022-07-20 01:41:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27104 to 23469. [2022-07-20 01:41:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23469 states, 16572 states have (on average 1.3225923244026068) internal successors, (21918), 17212 states have internal predecessors, (21918), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1594 states have return successors, (6779), 5034 states have call predecessors, (6779), 5301 states have call successors, (6779) [2022-07-20 01:41:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23469 states to 23469 states and 33999 transitions. [2022-07-20 01:41:42,601 INFO L78 Accepts]: Start accepts. Automaton has 23469 states and 33999 transitions. Word has length 253 [2022-07-20 01:41:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:42,602 INFO L495 AbstractCegarLoop]: Abstraction has 23469 states and 33999 transitions. [2022-07-20 01:41:42,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:41:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23469 states and 33999 transitions. [2022-07-20 01:41:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-20 01:41:42,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:42,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:42,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:42,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash 556023379, now seen corresponding path program 1 times [2022-07-20 01:41:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:42,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956865342] [2022-07-20 01:41:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:42,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:42,832 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) [2022-07-20 01:41:42,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 01:41:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 2385 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 01:41:44,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-20 01:41:44,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:44,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956865342] [2022-07-20 01:41:44,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956865342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:44,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:44,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 01:41:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609823127] [2022-07-20 01:41:44,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:44,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 01:41:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 01:41:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:44,758 INFO L87 Difference]: Start difference. First operand 23469 states and 33999 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:41:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:45,354 INFO L93 Difference]: Finished difference Result 50605 states and 74066 transitions. [2022-07-20 01:41:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 01:41:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 261 [2022-07-20 01:41:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:45,452 INFO L225 Difference]: With dead ends: 50605 [2022-07-20 01:41:45,453 INFO L226 Difference]: Without dead ends: 27164 [2022-07-20 01:41:45,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:45,521 INFO L413 NwaCegarLoop]: 1783 mSDtfsCounter, 235 mSDsluCounter, 5059 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 6842 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:45,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 6842 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 01:41:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27164 states. [2022-07-20 01:41:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27164 to 23509. [2022-07-20 01:41:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23509 states, 16602 states have (on average 1.322009396458258) internal successors, (21948), 17242 states have internal predecessors, (21948), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1604 states have return successors, (6799), 5044 states have call predecessors, (6799), 5301 states have call successors, (6799) [2022-07-20 01:41:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23509 states to 23509 states and 34049 transitions. [2022-07-20 01:41:46,307 INFO L78 Accepts]: Start accepts. Automaton has 23509 states and 34049 transitions. Word has length 261 [2022-07-20 01:41:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:46,308 INFO L495 AbstractCegarLoop]: Abstraction has 23509 states and 34049 transitions. [2022-07-20 01:41:46,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:41:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 23509 states and 34049 transitions. [2022-07-20 01:41:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-20 01:41:46,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:46,316 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:46,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:46,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:46,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash -126924412, now seen corresponding path program 1 times [2022-07-20 01:41:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:46,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112545384] [2022-07-20 01:41:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:46,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:46,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:46,535 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) [2022-07-20 01:41:46,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 01:41:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:48,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 2398 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 01:41:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 01:41:48,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:48,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112545384] [2022-07-20 01:41:48,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112545384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:48,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:48,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 01:41:48,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115048574] [2022-07-20 01:41:48,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:48,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 01:41:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 01:41:48,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:48,401 INFO L87 Difference]: Start difference. First operand 23509 states and 34049 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:41:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:49,168 INFO L93 Difference]: Finished difference Result 47170 states and 68435 transitions. [2022-07-20 01:41:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 01:41:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 260 [2022-07-20 01:41:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:49,263 INFO L225 Difference]: With dead ends: 47170 [2022-07-20 01:41:49,263 INFO L226 Difference]: Without dead ends: 23689 [2022-07-20 01:41:49,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 01:41:49,334 INFO L413 NwaCegarLoop]: 1449 mSDtfsCounter, 8 mSDsluCounter, 4341 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 5790 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:49,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 5790 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 01:41:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23689 states. [2022-07-20 01:41:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23689 to 23609. [2022-07-20 01:41:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23609 states, 16702 states have (on average 1.3200814273739672) internal successors, (22048), 17342 states have internal predecessors, (22048), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1604 states have return successors, (6799), 5044 states have call predecessors, (6799), 5301 states have call successors, (6799) [2022-07-20 01:41:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23609 states to 23609 states and 34149 transitions. [2022-07-20 01:41:50,085 INFO L78 Accepts]: Start accepts. Automaton has 23609 states and 34149 transitions. Word has length 260 [2022-07-20 01:41:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:50,085 INFO L495 AbstractCegarLoop]: Abstraction has 23609 states and 34149 transitions. [2022-07-20 01:41:50,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:41:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 23609 states and 34149 transitions. [2022-07-20 01:41:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-20 01:41:50,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:50,094 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:50,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-20 01:41:50,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:50,311 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2054354550, now seen corresponding path program 1 times [2022-07-20 01:41:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:50,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417265831] [2022-07-20 01:41:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:50,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:50,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:50,315 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) [2022-07-20 01:41:50,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 01:41:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 2407 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 01:41:52,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 01:41:52,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:52,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:52,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417265831] [2022-07-20 01:41:52,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417265831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:52,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:52,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 01:41:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001115828] [2022-07-20 01:41:52,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:52,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 01:41:52,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 01:41:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 01:41:52,489 INFO L87 Difference]: Start difference. First operand 23609 states and 34149 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-07-20 01:41:54,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:41:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:41:55,505 INFO L93 Difference]: Finished difference Result 50865 states and 74356 transitions. [2022-07-20 01:41:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 01:41:55,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 260 [2022-07-20 01:41:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:41:55,604 INFO L225 Difference]: With dead ends: 50865 [2022-07-20 01:41:55,604 INFO L226 Difference]: Without dead ends: 27284 [2022-07-20 01:41:55,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:41:55,667 INFO L413 NwaCegarLoop]: 1578 mSDtfsCounter, 335 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 4480 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:41:55,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 4480 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 01:41:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27284 states. [2022-07-20 01:41:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27284 to 23609. [2022-07-20 01:41:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23609 states, 16702 states have (on average 1.319482696683032) internal successors, (22038), 17342 states have internal predecessors, (22038), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1604 states have return successors, (6799), 5044 states have call predecessors, (6799), 5301 states have call successors, (6799) [2022-07-20 01:41:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23609 states to 23609 states and 34139 transitions. [2022-07-20 01:41:56,524 INFO L78 Accepts]: Start accepts. Automaton has 23609 states and 34139 transitions. Word has length 260 [2022-07-20 01:41:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:41:56,525 INFO L495 AbstractCegarLoop]: Abstraction has 23609 states and 34139 transitions. [2022-07-20 01:41:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-07-20 01:41:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 23609 states and 34139 transitions. [2022-07-20 01:41:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-20 01:41:56,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:41:56,531 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:41:56,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 01:41:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:41:56,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:41:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:41:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 513467784, now seen corresponding path program 1 times [2022-07-20 01:41:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:41:56,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017194185] [2022-07-20 01:41:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:41:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:41:56,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:41:56,744 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) [2022-07-20 01:41:56,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 01:41:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:41:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 01:41:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:41:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-20 01:41:58,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:41:58,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:41:58,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017194185] [2022-07-20 01:41:58,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017194185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:41:58,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:41:58,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 01:41:58,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55282325] [2022-07-20 01:41:58,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:41:58,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 01:41:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:41:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 01:41:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 01:41:58,959 INFO L87 Difference]: Start difference. First operand 23609 states and 34139 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 6 states have internal predecessors, (152), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:42:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:42:00,412 INFO L93 Difference]: Finished difference Result 54800 states and 80837 transitions. [2022-07-20 01:42:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 01:42:00,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 6 states have internal predecessors, (152), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 260 [2022-07-20 01:42:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:42:00,524 INFO L225 Difference]: With dead ends: 54800 [2022-07-20 01:42:00,525 INFO L226 Difference]: Without dead ends: 31219 [2022-07-20 01:42:00,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-20 01:42:00,600 INFO L413 NwaCegarLoop]: 1884 mSDtfsCounter, 1247 mSDsluCounter, 8597 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 10481 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 01:42:00,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1247 Valid, 10481 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 01:42:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31219 states. [2022-07-20 01:42:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31219 to 23649. [2022-07-20 01:42:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23649 states, 16742 states have (on average 1.318719388364592) internal successors, (22078), 17372 states have internal predecessors, (22078), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1604 states have return successors, (6799), 5054 states have call predecessors, (6799), 5301 states have call successors, (6799) [2022-07-20 01:42:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23649 states to 23649 states and 34179 transitions. [2022-07-20 01:42:01,507 INFO L78 Accepts]: Start accepts. Automaton has 23649 states and 34179 transitions. Word has length 260 [2022-07-20 01:42:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:42:01,508 INFO L495 AbstractCegarLoop]: Abstraction has 23649 states and 34179 transitions. [2022-07-20 01:42:01,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 6 states have internal predecessors, (152), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:42:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 23649 states and 34179 transitions. [2022-07-20 01:42:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-07-20 01:42:01,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:42:01,515 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:42:01,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 01:42:01,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:42:01,732 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:42:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:42:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1568997441, now seen corresponding path program 1 times [2022-07-20 01:42:01,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:42:01,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395269999] [2022-07-20 01:42:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:42:01,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:42:01,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:42:01,735 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) [2022-07-20 01:42:01,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 01:42:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:42:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2455 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 01:42:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:42:03,780 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 10 treesize of output 4 [2022-07-20 01:42:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-20 01:42:03,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:42:03,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:42:03,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395269999] [2022-07-20 01:42:03,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395269999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:42:03,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:42:03,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 01:42:03,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720790456] [2022-07-20 01:42:03,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:42:03,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 01:42:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:42:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 01:42:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:42:03,896 INFO L87 Difference]: Start difference. First operand 23649 states and 34179 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:42:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:42:04,494 INFO L93 Difference]: Finished difference Result 47270 states and 68325 transitions. [2022-07-20 01:42:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 01:42:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 267 [2022-07-20 01:42:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:42:04,558 INFO L225 Difference]: With dead ends: 47270 [2022-07-20 01:42:04,558 INFO L226 Difference]: Without dead ends: 23649 [2022-07-20 01:42:04,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:42:04,610 INFO L413 NwaCegarLoop]: 1455 mSDtfsCounter, 0 mSDsluCounter, 4175 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5630 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 01:42:04,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5630 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 189 Unchecked, 0.0s Time] [2022-07-20 01:42:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23649 states. [2022-07-20 01:42:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23649 to 23649. [2022-07-20 01:42:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23649 states, 16742 states have (on average 1.3181220881615099) internal successors, (22068), 17372 states have internal predecessors, (22068), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1604 states have return successors, (6799), 5054 states have call predecessors, (6799), 5301 states have call successors, (6799) [2022-07-20 01:42:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23649 states to 23649 states and 34169 transitions. [2022-07-20 01:42:05,205 INFO L78 Accepts]: Start accepts. Automaton has 23649 states and 34169 transitions. Word has length 267 [2022-07-20 01:42:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:42:05,206 INFO L495 AbstractCegarLoop]: Abstraction has 23649 states and 34169 transitions. [2022-07-20 01:42:05,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 01:42:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23649 states and 34169 transitions. [2022-07-20 01:42:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-07-20 01:42:05,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:42:05,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:42:05,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-20 01:42:05,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:42:05,413 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:42:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:42:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1292337354, now seen corresponding path program 1 times [2022-07-20 01:42:05,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:42:05,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465167722] [2022-07-20 01:42:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:42:05,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:42:05,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:42:05,416 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) [2022-07-20 01:42:05,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 01:42:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:42:07,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 01:42:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:42:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 01:42:07,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:42:07,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:42:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465167722] [2022-07-20 01:42:07,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465167722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:42:07,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:42:07,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 01:42:07,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15292633] [2022-07-20 01:42:07,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:42:07,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 01:42:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:42:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 01:42:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 01:42:07,841 INFO L87 Difference]: Start difference. First operand 23649 states and 34169 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-20 01:42:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:42:08,932 INFO L93 Difference]: Finished difference Result 51890 states and 75916 transitions. [2022-07-20 01:42:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 01:42:08,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 273 [2022-07-20 01:42:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:42:09,023 INFO L225 Difference]: With dead ends: 51890 [2022-07-20 01:42:09,023 INFO L226 Difference]: Without dead ends: 28269 [2022-07-20 01:42:09,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 01:42:09,089 INFO L413 NwaCegarLoop]: 1859 mSDtfsCounter, 645 mSDsluCounter, 6716 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 8575 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 01:42:09,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 8575 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 01:42:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28269 states. [2022-07-20 01:42:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28269 to 23699. [2022-07-20 01:42:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23699 states, 16782 states have (on average 1.3173638422118936) internal successors, (22108), 17412 states have internal predecessors, (22108), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1614 states have return successors, (6869), 5064 states have call predecessors, (6869), 5301 states have call successors, (6869) [2022-07-20 01:42:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23699 states to 23699 states and 34279 transitions. [2022-07-20 01:42:09,964 INFO L78 Accepts]: Start accepts. Automaton has 23699 states and 34279 transitions. Word has length 273 [2022-07-20 01:42:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:42:09,964 INFO L495 AbstractCegarLoop]: Abstraction has 23699 states and 34279 transitions. [2022-07-20 01:42:09,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-20 01:42:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 23699 states and 34279 transitions. [2022-07-20 01:42:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-07-20 01:42:09,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:42:09,971 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:42:10,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-20 01:42:10,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:42:10,172 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:42:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:42:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1360605743, now seen corresponding path program 1 times [2022-07-20 01:42:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:42:10,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818655594] [2022-07-20 01:42:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:42:10,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:42:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:42:10,175 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) [2022-07-20 01:42:10,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 01:42:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:42:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 01:42:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:42:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-20 01:42:12,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:42:12,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:42:12,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818655594] [2022-07-20 01:42:12,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818655594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:42:12,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:42:12,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 01:42:12,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752009372] [2022-07-20 01:42:12,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:42:12,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 01:42:12,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:42:12,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 01:42:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 01:42:12,055 INFO L87 Difference]: Start difference. First operand 23699 states and 34279 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-07-20 01:42:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:42:13,403 INFO L93 Difference]: Finished difference Result 56429 states and 81447 transitions. [2022-07-20 01:42:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 01:42:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 277 [2022-07-20 01:42:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:42:13,528 INFO L225 Difference]: With dead ends: 56429 [2022-07-20 01:42:13,529 INFO L226 Difference]: Without dead ends: 32758 [2022-07-20 01:42:13,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:42:13,607 INFO L413 NwaCegarLoop]: 2730 mSDtfsCounter, 1479 mSDsluCounter, 3973 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 6703 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 01:42:13,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 6703 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 01:42:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32758 states. [2022-07-20 01:42:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32758 to 23719. [2022-07-20 01:42:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23719 states, 16802 states have (on average 1.3169860730865373) internal successors, (22128), 17432 states have internal predecessors, (22128), 5302 states have call successors, (5302), 1618 states have call predecessors, (5302), 1614 states have return successors, (6869), 5064 states have call predecessors, (6869), 5301 states have call successors, (6869) [2022-07-20 01:42:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23719 states to 23719 states and 34299 transitions. [2022-07-20 01:42:14,467 INFO L78 Accepts]: Start accepts. Automaton has 23719 states and 34299 transitions. Word has length 277 [2022-07-20 01:42:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:42:14,467 INFO L495 AbstractCegarLoop]: Abstraction has 23719 states and 34299 transitions. [2022-07-20 01:42:14,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-07-20 01:42:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 23719 states and 34299 transitions. [2022-07-20 01:42:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-07-20 01:42:14,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:42:14,474 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:42:14,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-20 01:42:14,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:42:14,674 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:42:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:42:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash -522312833, now seen corresponding path program 1 times [2022-07-20 01:42:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:42:14,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37856986] [2022-07-20 01:42:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:42:14,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:42:14,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:42:14,678 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) [2022-07-20 01:42:14,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 01:42:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:42:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 01:42:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:42:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-20 01:42:17,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 01:42:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 01:42:18,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:42:18,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37856986] [2022-07-20 01:42:18,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37856986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 01:42:18,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 01:42:18,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-07-20 01:42:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462817720] [2022-07-20 01:42:18,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 01:42:18,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 01:42:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:42:18,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 01:42:18,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-07-20 01:42:18,521 INFO L87 Difference]: Start difference. First operand 23719 states and 34299 transitions. Second operand has 20 states, 19 states have (on average 9.157894736842104) internal successors, (174), 16 states have internal predecessors, (174), 5 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (33), 8 states have call predecessors, (33), 5 states have call successors, (33) [2022-07-20 01:42:20,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:23,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:25,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:27,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:29,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:31,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:33,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:35,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:37,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:39,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:42:43,141 INFO L93 Difference]: Finished difference Result 56700 states and 83780 transitions. [2022-07-20 01:42:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 01:42:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 9.157894736842104) internal successors, (174), 16 states have internal predecessors, (174), 5 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (33), 8 states have call predecessors, (33), 5 states have call successors, (33) Word has length 279 [2022-07-20 01:42:43,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:42:43,256 INFO L225 Difference]: With dead ends: 56700 [2022-07-20 01:42:43,256 INFO L226 Difference]: Without dead ends: 33009 [2022-07-20 01:42:43,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-07-20 01:42:43,330 INFO L413 NwaCegarLoop]: 1917 mSDtfsCounter, 2500 mSDsluCounter, 25415 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 519 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2565 SdHoareTripleChecker+Valid, 27332 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2022-07-20 01:42:43,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2565 Valid, 27332 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 452 Invalid, 10 Unknown, 0 Unchecked, 22.7s Time] [2022-07-20 01:42:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33009 states. [2022-07-20 01:42:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33009 to 23759. [2022-07-20 01:42:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23759 states, 16832 states have (on average 1.3158269961977187) internal successors, (22148), 17462 states have internal predecessors, (22148), 5312 states have call successors, (5312), 1618 states have call predecessors, (5312), 1614 states have return successors, (6879), 5069 states have call predecessors, (6879), 5311 states have call successors, (6879) [2022-07-20 01:42:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23759 states to 23759 states and 34339 transitions. [2022-07-20 01:42:44,200 INFO L78 Accepts]: Start accepts. Automaton has 23759 states and 34339 transitions. Word has length 279 [2022-07-20 01:42:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:42:44,200 INFO L495 AbstractCegarLoop]: Abstraction has 23759 states and 34339 transitions. [2022-07-20 01:42:44,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 9.157894736842104) internal successors, (174), 16 states have internal predecessors, (174), 5 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (33), 8 states have call predecessors, (33), 5 states have call successors, (33) [2022-07-20 01:42:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23759 states and 34339 transitions. [2022-07-20 01:42:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-07-20 01:42:44,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:42:44,206 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:42:44,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-20 01:42:44,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:42:44,412 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:42:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:42:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1321945576, now seen corresponding path program 1 times [2022-07-20 01:42:44,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:42:44,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752945144] [2022-07-20 01:42:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:42:44,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:42:44,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:42:44,415 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) [2022-07-20 01:42:44,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 01:42:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:42:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2770 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 01:42:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:42:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 01:42:46,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:42:46,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:42:46,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752945144] [2022-07-20 01:42:46,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752945144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:42:46,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:42:46,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 01:42:46,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280727071] [2022-07-20 01:42:46,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:42:46,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 01:42:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:42:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 01:42:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 01:42:46,977 INFO L87 Difference]: Start difference. First operand 23759 states and 34339 transitions. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 3 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-07-20 01:42:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:42:48,986 INFO L93 Difference]: Finished difference Result 57864 states and 83630 transitions. [2022-07-20 01:42:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 01:42:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 3 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 349 [2022-07-20 01:42:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:42:49,105 INFO L225 Difference]: With dead ends: 57864 [2022-07-20 01:42:49,106 INFO L226 Difference]: Without dead ends: 34133 [2022-07-20 01:42:49,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 01:42:49,174 INFO L413 NwaCegarLoop]: 2985 mSDtfsCounter, 1710 mSDsluCounter, 6900 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 9885 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 01:42:49,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1759 Valid, 9885 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 01:42:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34133 states. [2022-07-20 01:42:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34133 to 23779. [2022-07-20 01:42:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 16842 states have (on average 1.3156394727467047) internal successors, (22158), 17472 states have internal predecessors, (22158), 5322 states have call successors, (5322), 1618 states have call predecessors, (5322), 1614 states have return successors, (6889), 5079 states have call predecessors, (6889), 5321 states have call successors, (6889) [2022-07-20 01:42:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 34369 transitions. [2022-07-20 01:42:50,061 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 34369 transitions. Word has length 349 [2022-07-20 01:42:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:42:50,061 INFO L495 AbstractCegarLoop]: Abstraction has 23779 states and 34369 transitions. [2022-07-20 01:42:50,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 3 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-07-20 01:42:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 34369 transitions. [2022-07-20 01:42:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-07-20 01:42:50,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:42:50,068 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:42:50,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-20 01:42:50,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:42:50,289 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:42:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:42:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash -978138414, now seen corresponding path program 1 times [2022-07-20 01:42:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:42:50,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150520162] [2022-07-20 01:42:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:42:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:42:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:42:50,292 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) [2022-07-20 01:42:50,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-20 01:42:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:42:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 3557 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 01:42:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:42:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-07-20 01:42:53,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:42:53,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:42:53,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150520162] [2022-07-20 01:42:53,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150520162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:42:53,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:42:53,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 01:42:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759573321] [2022-07-20 01:42:53,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:42:53,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 01:42:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:42:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 01:42:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 01:42:53,643 INFO L87 Difference]: Start difference. First operand 23779 states and 34369 transitions. Second operand has 8 states, 8 states have (on average 25.25) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2022-07-20 01:42:56,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 01:42:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:42:57,513 INFO L93 Difference]: Finished difference Result 49980 states and 72756 transitions. [2022-07-20 01:42:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 01:42:57,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) Word has length 408 [2022-07-20 01:42:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:42:57,598 INFO L225 Difference]: With dead ends: 49980 [2022-07-20 01:42:57,598 INFO L226 Difference]: Without dead ends: 26229 [2022-07-20 01:42:57,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-20 01:42:57,655 INFO L413 NwaCegarLoop]: 2067 mSDtfsCounter, 1027 mSDsluCounter, 10896 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 194 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 12963 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 01:42:57,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 12963 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 01:42:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26229 states. [2022-07-20 01:42:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26229 to 23229. [2022-07-20 01:42:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23229 states, 16477 states have (on average 1.3177762942283182) internal successors, (21713), 17092 states have internal predecessors, (21713), 5182 states have call successors, (5182), 1573 states have call predecessors, (5182), 1569 states have return successors, (6739), 4939 states have call predecessors, (6739), 5181 states have call successors, (6739) [2022-07-20 01:42:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23229 states to 23229 states and 33634 transitions. [2022-07-20 01:42:58,532 INFO L78 Accepts]: Start accepts. Automaton has 23229 states and 33634 transitions. Word has length 408 [2022-07-20 01:42:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:42:58,533 INFO L495 AbstractCegarLoop]: Abstraction has 23229 states and 33634 transitions. [2022-07-20 01:42:58,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2022-07-20 01:42:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23229 states and 33634 transitions. [2022-07-20 01:42:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-07-20 01:42:58,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:42:58,541 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:42:58,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-20 01:42:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:42:58,768 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:42:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:42:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1631183859, now seen corresponding path program 1 times [2022-07-20 01:42:58,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:42:58,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947789108] [2022-07-20 01:42:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:42:58,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:42:58,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:42:58,771 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) [2022-07-20 01:42:58,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-20 01:43:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:43:02,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 3518 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 01:43:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:43:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 219 proven. 10 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-20 01:43:02,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 01:43:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 34 proven. 111 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-07-20 01:43:03,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:43:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947789108] [2022-07-20 01:43:03,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947789108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 01:43:03,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 01:43:03,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 01:43:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051969351] [2022-07-20 01:43:03,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 01:43:03,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 01:43:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:43:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 01:43:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-20 01:43:03,311 INFO L87 Difference]: Start difference. First operand 23229 states and 33634 transitions. Second operand has 14 states, 14 states have (on average 16.5) internal successors, (231), 14 states have internal predecessors, (231), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-20 01:43:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:43:05,672 INFO L93 Difference]: Finished difference Result 46555 states and 67436 transitions. [2022-07-20 01:43:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 01:43:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.5) internal successors, (231), 14 states have internal predecessors, (231), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 408 [2022-07-20 01:43:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:43:05,766 INFO L225 Difference]: With dead ends: 46555 [2022-07-20 01:43:05,766 INFO L226 Difference]: Without dead ends: 23324 [2022-07-20 01:43:05,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2022-07-20 01:43:05,845 INFO L413 NwaCegarLoop]: 1450 mSDtfsCounter, 35 mSDsluCounter, 8683 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10133 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 01:43:05,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10133 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 01:43:05,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23324 states. [2022-07-20 01:43:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23324 to 23314. [2022-07-20 01:43:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23314 states, 16557 states have (on average 1.3180527873407017) internal successors, (21823), 17172 states have internal predecessors, (21823), 5182 states have call successors, (5182), 1578 states have call predecessors, (5182), 1574 states have return successors, (6739), 4939 states have call predecessors, (6739), 5181 states have call successors, (6739) [2022-07-20 01:43:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23314 states to 23314 states and 33744 transitions. [2022-07-20 01:43:06,827 INFO L78 Accepts]: Start accepts. Automaton has 23314 states and 33744 transitions. Word has length 408 [2022-07-20 01:43:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:43:06,827 INFO L495 AbstractCegarLoop]: Abstraction has 23314 states and 33744 transitions. [2022-07-20 01:43:06,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.5) internal successors, (231), 14 states have internal predecessors, (231), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-20 01:43:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23314 states and 33744 transitions. [2022-07-20 01:43:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-20 01:43:06,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:43:06,835 INFO L195 NwaCegarLoop]: trace histogram [34, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:43:06,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-20 01:43:07,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:43:07,036 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:43:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:43:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2032065013, now seen corresponding path program 1 times [2022-07-20 01:43:07,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:43:07,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162551396] [2022-07-20 01:43:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:43:07,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:43:07,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:43:07,040 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) [2022-07-20 01:43:07,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 01:43:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:43:10,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 3703 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 01:43:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:43:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 445 proven. 55 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-20 01:43:11,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 01:43:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 64 proven. 321 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2022-07-20 01:43:13,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:43:13,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162551396] [2022-07-20 01:43:13,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162551396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 01:43:13,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 01:43:13,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 01:43:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616763962] [2022-07-20 01:43:13,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 01:43:13,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 01:43:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:43:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 01:43:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-20 01:43:13,378 INFO L87 Difference]: Start difference. First operand 23314 states and 33744 transitions. Second operand has 26 states, 26 states have (on average 9.5) internal successors, (247), 26 states have internal predecessors, (247), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-20 01:43:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:43:21,437 INFO L93 Difference]: Finished difference Result 46984 states and 68022 transitions. [2022-07-20 01:43:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 01:43:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.5) internal successors, (247), 26 states have internal predecessors, (247), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 427 [2022-07-20 01:43:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:43:21,520 INFO L225 Difference]: With dead ends: 46984 [2022-07-20 01:43:21,520 INFO L226 Difference]: Without dead ends: 23498 [2022-07-20 01:43:21,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=917, Invalid=1945, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 01:43:21,583 INFO L413 NwaCegarLoop]: 1456 mSDtfsCounter, 191 mSDsluCounter, 15980 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 17436 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 01:43:21,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 17436 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 01:43:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23498 states. [2022-07-20 01:43:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23498 to 23464. [2022-07-20 01:43:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 16707 states have (on average 1.3137008439576225) internal successors, (21948), 17322 states have internal predecessors, (21948), 5182 states have call successors, (5182), 1578 states have call predecessors, (5182), 1574 states have return successors, (6739), 4939 states have call predecessors, (6739), 5181 states have call successors, (6739) [2022-07-20 01:43:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 33869 transitions. [2022-07-20 01:43:22,669 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 33869 transitions. Word has length 427 [2022-07-20 01:43:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:43:22,669 INFO L495 AbstractCegarLoop]: Abstraction has 23464 states and 33869 transitions. [2022-07-20 01:43:22,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.5) internal successors, (247), 26 states have internal predecessors, (247), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-20 01:43:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 33869 transitions. [2022-07-20 01:43:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-07-20 01:43:22,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:43:22,675 INFO L195 NwaCegarLoop]: trace histogram [70, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:43:22,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-20 01:43:22,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:43:22,876 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:43:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:43:22,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2017449931, now seen corresponding path program 2 times [2022-07-20 01:43:22,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:43:22,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139682613] [2022-07-20 01:43:22,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 01:43:22,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:43:22,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:43:22,880 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) [2022-07-20 01:43:22,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-20 01:43:24,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 01:43:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 01:43:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 2030 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 01:43:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:43:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2962 trivial. 0 not checked. [2022-07-20 01:43:24,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:43:24,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:43:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139682613] [2022-07-20 01:43:24,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139682613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:43:24,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:43:24,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 01:43:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852980989] [2022-07-20 01:43:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:43:24,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 01:43:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:43:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 01:43:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-20 01:43:24,919 INFO L87 Difference]: Start difference. First operand 23464 states and 33869 transitions. Second operand has 10 states, 10 states have (on average 18.4) internal successors, (184), 8 states have internal predecessors, (184), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) [2022-07-20 01:43:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:43:29,881 INFO L93 Difference]: Finished difference Result 57069 states and 82360 transitions. [2022-07-20 01:43:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 01:43:29,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.4) internal successors, (184), 8 states have internal predecessors, (184), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) Word has length 463 [2022-07-20 01:43:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:43:30,012 INFO L225 Difference]: With dead ends: 57069 [2022-07-20 01:43:30,013 INFO L226 Difference]: Without dead ends: 33633 [2022-07-20 01:43:30,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-07-20 01:43:30,087 INFO L413 NwaCegarLoop]: 2078 mSDtfsCounter, 1976 mSDsluCounter, 15831 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1979 SdHoareTripleChecker+Valid, 17909 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 01:43:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1979 Valid, 17909 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 01:43:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33633 states. [2022-07-20 01:43:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33633 to 23559. [2022-07-20 01:43:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23559 states, 16777 states have (on average 1.3123919651904392) internal successors, (22018), 17392 states have internal predecessors, (22018), 5192 states have call successors, (5192), 1578 states have call predecessors, (5192), 1589 states have return successors, (6764), 4969 states have call predecessors, (6764), 5191 states have call successors, (6764) [2022-07-20 01:43:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23559 states to 23559 states and 33974 transitions. [2022-07-20 01:43:31,212 INFO L78 Accepts]: Start accepts. Automaton has 23559 states and 33974 transitions. Word has length 463 [2022-07-20 01:43:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:43:31,215 INFO L495 AbstractCegarLoop]: Abstraction has 23559 states and 33974 transitions. [2022-07-20 01:43:31,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.4) internal successors, (184), 8 states have internal predecessors, (184), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) [2022-07-20 01:43:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23559 states and 33974 transitions. [2022-07-20 01:43:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-07-20 01:43:31,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:43:31,222 INFO L195 NwaCegarLoop]: trace histogram [70, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:43:31,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-20 01:43:31,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:43:31,448 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:43:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:43:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash 331270093, now seen corresponding path program 1 times [2022-07-20 01:43:31,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:43:31,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276012293] [2022-07-20 01:43:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:43:31,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:43:31,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:43:31,452 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) [2022-07-20 01:43:31,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 01:43:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:43:35,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 4097 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 01:43:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:43:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 1441 proven. 253 refuted. 0 times theorem prover too weak. 1277 trivial. 0 not checked. [2022-07-20 01:43:37,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 01:43:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 124 proven. 1335 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-07-20 01:43:45,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:43:45,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276012293] [2022-07-20 01:43:45,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276012293] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 01:43:45,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 01:43:45,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-20 01:43:45,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214805812] [2022-07-20 01:43:45,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 01:43:45,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 01:43:45,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:43:45,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 01:43:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 01:43:45,373 INFO L87 Difference]: Start difference. First operand 23559 states and 33974 transitions. Second operand has 50 states, 50 states have (on average 5.42) internal successors, (271), 50 states have internal predecessors, (271), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-20 01:44:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:44:23,285 INFO L93 Difference]: Finished difference Result 47852 states and 69034 transitions. [2022-07-20 01:44:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-20 01:44:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.42) internal successors, (271), 50 states have internal predecessors, (271), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 463 [2022-07-20 01:44:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:44:23,377 INFO L225 Difference]: With dead ends: 47852 [2022-07-20 01:44:23,377 INFO L226 Difference]: Without dead ends: 23941 [2022-07-20 01:44:23,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=3869, Invalid=9013, Unknown=0, NotChecked=0, Total=12882 [2022-07-20 01:44:23,460 INFO L413 NwaCegarLoop]: 1468 mSDtfsCounter, 696 mSDsluCounter, 35126 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 36594 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-07-20 01:44:23,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 36594 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-07-20 01:44:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23941 states. [2022-07-20 01:44:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23941 to 23859. [2022-07-20 01:44:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23859 states, 17077 states have (on average 1.3069040229548516) internal successors, (22318), 17692 states have internal predecessors, (22318), 5192 states have call successors, (5192), 1578 states have call predecessors, (5192), 1589 states have return successors, (6764), 4969 states have call predecessors, (6764), 5191 states have call successors, (6764) [2022-07-20 01:44:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23859 states to 23859 states and 34274 transitions. [2022-07-20 01:44:24,486 INFO L78 Accepts]: Start accepts. Automaton has 23859 states and 34274 transitions. Word has length 463 [2022-07-20 01:44:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:44:24,487 INFO L495 AbstractCegarLoop]: Abstraction has 23859 states and 34274 transitions. [2022-07-20 01:44:24,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.42) internal successors, (271), 50 states have internal predecessors, (271), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-20 01:44:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 23859 states and 34274 transitions. [2022-07-20 01:44:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-07-20 01:44:24,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:44:24,493 INFO L195 NwaCegarLoop]: trace histogram [142, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:44:24,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-20 01:44:24,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:44:24,694 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:44:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:44:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2110026931, now seen corresponding path program 2 times [2022-07-20 01:44:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:44:24,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333405343] [2022-07-20 01:44:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 01:44:24,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:44:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:44:24,700 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) [2022-07-20 01:44:24,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-20 01:44:26,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 01:44:26,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 01:44:26,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2028 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 01:44:26,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:44:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10855 trivial. 0 not checked. [2022-07-20 01:44:26,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 01:44:26,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 01:44:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333405343] [2022-07-20 01:44:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333405343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 01:44:26,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 01:44:26,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 01:44:26,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771710482] [2022-07-20 01:44:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 01:44:26,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 01:44:26,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 01:44:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 01:44:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 01:44:26,654 INFO L87 Difference]: Start difference. First operand 23859 states and 34274 transitions. Second operand has 7 states, 6 states have (on average 30.0) internal successors, (180), 5 states have internal predecessors, (180), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-07-20 01:44:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 01:44:28,158 INFO L93 Difference]: Finished difference Result 26172 states and 37721 transitions. [2022-07-20 01:44:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 01:44:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 30.0) internal successors, (180), 5 states have internal predecessors, (180), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 535 [2022-07-20 01:44:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 01:44:28,258 INFO L225 Difference]: With dead ends: 26172 [2022-07-20 01:44:28,258 INFO L226 Difference]: Without dead ends: 26169 [2022-07-20 01:44:28,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-20 01:44:28,280 INFO L413 NwaCegarLoop]: 1545 mSDtfsCounter, 298 mSDsluCounter, 7139 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 8684 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 01:44:28,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 8684 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 01:44:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26169 states. [2022-07-20 01:44:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26169 to 23979. [2022-07-20 01:44:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23979 states, 17167 states have (on average 1.3052950428147025) internal successors, (22408), 17782 states have internal predecessors, (22408), 5192 states have call successors, (5192), 1608 states have call predecessors, (5192), 1619 states have return successors, (6764), 4969 states have call predecessors, (6764), 5191 states have call successors, (6764) [2022-07-20 01:44:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23979 states to 23979 states and 34364 transitions. [2022-07-20 01:44:29,362 INFO L78 Accepts]: Start accepts. Automaton has 23979 states and 34364 transitions. Word has length 535 [2022-07-20 01:44:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 01:44:29,363 INFO L495 AbstractCegarLoop]: Abstraction has 23979 states and 34364 transitions. [2022-07-20 01:44:29,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 30.0) internal successors, (180), 5 states have internal predecessors, (180), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-07-20 01:44:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23979 states and 34364 transitions. [2022-07-20 01:44:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-07-20 01:44:29,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 01:44:29,369 INFO L195 NwaCegarLoop]: trace histogram [142, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 01:44:29,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-20 01:44:29,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 01:44:29,570 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 01:44:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 01:44:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1558896146, now seen corresponding path program 1 times [2022-07-20 01:44:29,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 01:44:29,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401891330] [2022-07-20 01:44:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 01:44:29,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 01:44:29,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 01:44:29,575 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) [2022-07-20 01:44:29,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-20 01:44:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 01:44:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 4895 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 01:44:34,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 01:44:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10855 backedges. 5161 proven. 1081 refuted. 0 times theorem prover too weak. 4613 trivial. 0 not checked. [2022-07-20 01:44:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates...