./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/knuth.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/knuth.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 08f39468d7757b1a22fdbf1465bbd41291a8868febbded34fd41fea8ffa53398 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:02:51,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:02:51,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:02:51,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:02:51,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:02:51,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:02:51,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:02:51,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:02:51,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:02:51,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:02:51,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:02:51,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:02:51,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:02:51,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:02:51,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:02:51,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:02:51,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:02:51,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:02:51,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:02:51,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:02:51,721 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:02:51,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:02:51,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:02:51,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:02:51,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:02:51,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:02:51,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:02:51,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:02:51,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:02:51,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:02:51,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:02:51,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:02:51,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:02:51,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:02:51,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:02:51,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:02:51,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:02:51,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:02:51,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:02:51,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:02:51,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:02:51,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:02:51,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:02:51,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:02:51,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:02:51,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:02:51,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:02:51,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:02:51,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:02:51,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:02:51,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:02:51,780 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:02:51,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:02:51,781 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:02:51,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:02:51,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:02:51,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:02:51,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:02:51,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:02:51,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:02:51,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:02:51,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:02:51,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:02:51,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:02:51,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:02:51,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:02:51,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:02:51,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:02:51,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:02:51,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:02:51,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:02:51,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:02:51,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:02:51,795 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:02:51,796 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:02:51,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:02:51,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08f39468d7757b1a22fdbf1465bbd41291a8868febbded34fd41fea8ffa53398 [2022-07-21 03:02:52,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:02:52,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:02:52,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:02:52,135 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:02:52,136 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:02:52,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/knuth.i [2022-07-21 03:02:52,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b0e99e8/0ba0c027364d44d4abbad3dc010b4fd9/FLAG18aa8acfa [2022-07-21 03:02:52,683 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:02:52,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/knuth.i [2022-07-21 03:02:52,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b0e99e8/0ba0c027364d44d4abbad3dc010b4fd9/FLAG18aa8acfa [2022-07-21 03:02:52,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b0e99e8/0ba0c027364d44d4abbad3dc010b4fd9 [2022-07-21 03:02:52,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:02:52,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:02:52,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:02:52,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:02:52,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:02:52,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:02:52" (1/1) ... [2022-07-21 03:02:52,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a6d40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:52, skipping insertion in model container [2022-07-21 03:02:52,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:02:52" (1/1) ... [2022-07-21 03:02:52,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:02:52,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:02:52,930 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/nla-digbench/knuth.i[948,961] [2022-07-21 03:02:52,950 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructOtherUnaryFloatOperation(IntegerTranslation.java:848) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.handleUnaryFloatFunction(StandardFunctionHandler.java:1792) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.translateStandardFunction(StandardFunctionHandler.java:235) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1447) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:267) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:729) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) 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.PRDispatcher.dispatch(PRDispatcher.java:220) 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.PRDispatcher.dispatch(PRDispatcher.java:232) 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.PRDispatcher.dispatch(PRDispatcher.java:155) 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.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-21 03:02:52,965 INFO L158 Benchmark]: Toolchain (without parser) took 242.89ms. Allocated memory was 52.4MB in the beginning and 69.2MB in the end (delta: 16.8MB). Free memory was 29.5MB in the beginning and 54.0MB in the end (delta: -24.5MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2022-07-21 03:02:52,966 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 52.4MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 44.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 03:02:52,969 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.50ms. Allocated memory was 52.4MB in the beginning and 69.2MB in the end (delta: 16.8MB). Free memory was 29.2MB in the beginning and 54.0MB in the end (delta: -24.8MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2022-07-21 03:02:52,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 52.4MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 44.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.50ms. Allocated memory was 52.4MB in the beginning and 69.2MB in the end (delta: 16.8MB). Free memory was 29.2MB in the beginning and 54.0MB in the end (delta: -24.8MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructOtherUnaryFloatOperation(IntegerTranslation.java:848) 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/nla-digbench/knuth.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 08f39468d7757b1a22fdbf1465bbd41291a8868febbded34fd41fea8ffa53398 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:02:54,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:02:54,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:02:54,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:02:54,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:02:54,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:02:54,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:02:54,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:02:54,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:02:54,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:02:54,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:02:54,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:02:54,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:02:54,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:02:54,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:02:54,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:02:54,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:02:54,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:02:54,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:02:54,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:02:54,920 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:02:54,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:02:54,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:02:54,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:02:54,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:02:54,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:02:54,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:02:54,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:02:54,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:02:54,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:02:54,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:02:54,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:02:54,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:02:54,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:02:54,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:02:54,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:02:54,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:02:54,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:02:54,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:02:54,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:02:54,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:02:54,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:02:54,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 03:02:54,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:02:54,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:02:54,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:02:54,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:02:54,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:02:54,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:02:54,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:02:54,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:02:54,982 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:02:54,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:02:54,983 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:02:54,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:02:54,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:02:54,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:02:54,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:02:54,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:02:54,984 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 03:02:54,984 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 03:02:54,985 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 03:02:54,985 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:02:54,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:02:54,985 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:02:54,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:02:54,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:02:54,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:02:54,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:02:54,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:02:54,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:02:54,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:02:54,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:02:54,987 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 03:02:54,987 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 03:02:54,987 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:02:54,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:02:54,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:02:54,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 03:02:54,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08f39468d7757b1a22fdbf1465bbd41291a8868febbded34fd41fea8ffa53398 [2022-07-21 03:02:55,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:02:55,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:02:55,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:02:55,330 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:02:55,330 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:02:55,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/knuth.i [2022-07-21 03:02:55,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c1412fc4/1e8ff4dad3d44dcdb8dffd77ca48813f/FLAGcaac29d30 [2022-07-21 03:02:55,837 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:02:55,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/knuth.i [2022-07-21 03:02:55,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c1412fc4/1e8ff4dad3d44dcdb8dffd77ca48813f/FLAGcaac29d30 [2022-07-21 03:02:56,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c1412fc4/1e8ff4dad3d44dcdb8dffd77ca48813f [2022-07-21 03:02:56,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:02:56,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:02:56,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:02:56,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:02:56,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:02:56,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21595d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56, skipping insertion in model container [2022-07-21 03:02:56,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:02:56,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:02:56,388 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/nla-digbench/knuth.i[948,961] [2022-07-21 03:02:56,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:02:56,430 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:02:56,445 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/nla-digbench/knuth.i[948,961] [2022-07-21 03:02:56,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:02:56,477 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:02:56,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56 WrapperNode [2022-07-21 03:02:56,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:02:56,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:02:56,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:02:56,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:02:56,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,515 INFO L137 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 64 [2022-07-21 03:02:56,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:02:56,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:02:56,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:02:56,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:02:56,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:02:56,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:02:56,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:02:56,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:02:56,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (1/1) ... [2022-07-21 03:02:56,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:02:56,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:02:56,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 03:02:56,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 03:02:56,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:02:56,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 03:02:56,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 03:02:56,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 03:02:56,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:02:56,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:02:56,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:02:56,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:02:56,710 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:02:56,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:02:59,738 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:02:59,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:02:59,744 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 03:02:59,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:02:59 BoogieIcfgContainer [2022-07-21 03:02:59,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:02:59,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:02:59,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:02:59,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:02:59,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:02:56" (1/3) ... [2022-07-21 03:02:59,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f47dcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:02:59, skipping insertion in model container [2022-07-21 03:02:59,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:02:56" (2/3) ... [2022-07-21 03:02:59,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f47dcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:02:59, skipping insertion in model container [2022-07-21 03:02:59,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:02:59" (3/3) ... [2022-07-21 03:02:59,756 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth.i [2022-07-21 03:02:59,770 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:02:59,771 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:02:59,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:02:59,838 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@722762c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@21a75798 [2022-07-21 03:02:59,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:02:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:02:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 03:02:59,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:02:59,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:02:59,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:02:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:02:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 384394467, now seen corresponding path program 1 times [2022-07-21 03:02:59,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 03:02:59,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022143982] [2022-07-21 03:02:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:02:59,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 03:02:59,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 03:02:59,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 03:02:59,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 03:03:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:03:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 03:03:00,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:03:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 03:03:00,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:03:00,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 03:03:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022143982] [2022-07-21 03:03:00,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022143982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:03:00,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:03:00,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:03:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823634976] [2022-07-21 03:03:00,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:03:00,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:03:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 03:03:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:03:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:03:00,203 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:03:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:03:00,221 INFO L93 Difference]: Finished difference Result 53 states and 80 transitions. [2022-07-21 03:03:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:03:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-21 03:03:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:03:00,230 INFO L225 Difference]: With dead ends: 53 [2022-07-21 03:03:00,230 INFO L226 Difference]: Without dead ends: 24 [2022-07-21 03:03:00,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:03:00,237 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:03:00,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:03:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-21 03:03:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-21 03:03:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:03:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-21 03:03:00,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 18 [2022-07-21 03:03:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:03:00,271 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-21 03:03:00,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:03:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-21 03:03:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 03:03:00,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:03:00,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:03:00,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 03:03:00,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 03:03:00,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:03:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:03:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 53335587, now seen corresponding path program 1 times [2022-07-21 03:03:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 03:03:00,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042818649] [2022-07-21 03:03:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:03:00,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 03:03:00,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 03:03:00,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 03:03:00,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process