./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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-scaling/knuth_valuebound20.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 f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 17:33:48,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 17:33:48,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 17:33:48,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 17:33:48,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 17:33:48,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 17:33:48,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 17:33:48,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 17:33:48,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 17:33:48,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 17:33:48,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 17:33:48,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 17:33:48,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 17:33:48,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 17:33:48,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 17:33:48,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 17:33:48,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 17:33:48,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 17:33:48,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 17:33:48,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 17:33:48,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 17:33:48,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 17:33:48,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 17:33:48,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 17:33:48,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 17:33:48,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 17:33:48,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 17:33:48,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 17:33:48,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 17:33:48,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 17:33:48,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 17:33:48,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 17:33:48,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 17:33:48,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 17:33:48,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 17:33:48,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 17:33:48,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 17:33:48,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 17:33:48,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 17:33:48,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 17:33:48,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 17:33:48,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 17:33:48,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 17:33:48,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 17:33:48,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 17:33:48,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 17:33:48,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 17:33:48,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 17:33:48,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 17:33:48,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 17:33:48,769 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 17:33:48,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 17:33:48,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 17:33:48,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 17:33:48,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 17:33:48,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 17:33:48,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 17:33:48,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 17:33:48,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 17:33:48,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 17:33:48,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 17:33:48,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 17:33:48,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 17:33:48,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 17:33:48,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 17:33:48,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 17:33:48,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:33:48,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 17:33:48,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 17:33:48,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 17:33:48,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 17:33:48,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 17:33:48,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 17:33:48,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 17:33:48,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 17:33:48,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b [2022-02-20 17:33:48,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 17:33:48,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 17:33:48,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 17:33:48,987 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 17:33:48,987 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 17:33:48,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2022-02-20 17:33:49,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cefb9169/aa85e05f6ad549f1bd119fa490b27eb0/FLAG2722df8ee [2022-02-20 17:33:49,354 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 17:33:49,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2022-02-20 17:33:49,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cefb9169/aa85e05f6ad549f1bd119fa490b27eb0/FLAG2722df8ee [2022-02-20 17:33:49,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cefb9169/aa85e05f6ad549f1bd119fa490b27eb0 [2022-02-20 17:33:49,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 17:33:49,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 17:33:49,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 17:33:49,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 17:33:49,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 17:33:49,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:33:49" (1/1) ... [2022-02-20 17:33:49,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5710491e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:49, skipping insertion in model container [2022-02-20 17:33:49,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:33:49" (1/1) ... [2022-02-20 17:33:49,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 17:33:49,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 17:33:49,931 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-scaling/knuth_valuebound20.i[948,961] [2022-02-20 17:33:49,941 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:1442) 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:1392) 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:1076) 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:1465) 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:3271) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2356) 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) [2022-02-20 17:33:49,944 INFO L158 Benchmark]: Toolchain (without parser) took 159.81ms. Allocated memory is still 104.9MB. Free memory was 72.4MB in the beginning and 81.9MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-20 17:33:49,945 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 17:33:49,946 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.11ms. Allocated memory is still 104.9MB. Free memory was 72.1MB in the beginning and 81.9MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-20 17:33:49,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.11ms. Allocated memory is still 104.9MB. Free memory was 72.1MB in the beginning and 81.9MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. 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 -ea -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-scaling/knuth_valuebound20.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 f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 17:33:51,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 17:33:51,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 17:33:51,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 17:33:51,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 17:33:51,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 17:33:51,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 17:33:51,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 17:33:51,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 17:33:51,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 17:33:51,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 17:33:51,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 17:33:51,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 17:33:51,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 17:33:51,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 17:33:51,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 17:33:51,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 17:33:51,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 17:33:51,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 17:33:51,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 17:33:51,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 17:33:51,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 17:33:51,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 17:33:51,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 17:33:51,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 17:33:51,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 17:33:51,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 17:33:51,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 17:33:51,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 17:33:51,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 17:33:51,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 17:33:51,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 17:33:51,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 17:33:51,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 17:33:51,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 17:33:51,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 17:33:51,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 17:33:51,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 17:33:51,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 17:33:51,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 17:33:51,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 17:33:51,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-02-20 17:33:51,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 17:33:51,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 17:33:51,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 17:33:51,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 17:33:51,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 17:33:51,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 17:33:51,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 17:33:51,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 17:33:51,579 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 17:33:51,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 17:33:51,579 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 17:33:51,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 17:33:51,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 17:33:51,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 17:33:51,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 17:33:51,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 17:33:51,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-02-20 17:33:51,581 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-02-20 17:33:51,581 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-02-20 17:33:51,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 17:33:51,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 17:33:51,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 17:33:51,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 17:33:51,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 17:33:51,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 17:33:51,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 17:33:51,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:33:51,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 17:33:51,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 17:33:51,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 17:33:51,584 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-02-20 17:33:51,584 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-02-20 17:33:51,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 17:33:51,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 17:33:51,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 17:33:51,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-20 17:33:51,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b [2022-02-20 17:33:51,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 17:33:51,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 17:33:51,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 17:33:51,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 17:33:51,864 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 17:33:51,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2022-02-20 17:33:51,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f12b635d7/ca83d4157778498da6c760145c942c38/FLAGcdacf3655 [2022-02-20 17:33:52,284 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 17:33:52,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2022-02-20 17:33:52,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f12b635d7/ca83d4157778498da6c760145c942c38/FLAGcdacf3655 [2022-02-20 17:33:52,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f12b635d7/ca83d4157778498da6c760145c942c38 [2022-02-20 17:33:52,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 17:33:52,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 17:33:52,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 17:33:52,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 17:33:52,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 17:33:52,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:52,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14aeab1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52, skipping insertion in model container [2022-02-20 17:33:52,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:52,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 17:33:52,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 17:33:52,821 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-scaling/knuth_valuebound20.i[948,961] [2022-02-20 17:33:52,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:33:52,858 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 17:33:52,894 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-scaling/knuth_valuebound20.i[948,961] [2022-02-20 17:33:52,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:33:52,927 INFO L208 MainTranslator]: Completed translation [2022-02-20 17:33:52,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52 WrapperNode [2022-02-20 17:33:52,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 17:33:52,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 17:33:52,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 17:33:52,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 17:33:52,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:52,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:52,976 INFO L137 Inliner]: procedures = 18, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2022-02-20 17:33:52,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 17:33:52,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 17:33:52,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 17:33:52,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 17:33:52,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:52,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:52,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:52,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:53,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:53,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:53,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:53,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 17:33:53,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 17:33:53,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 17:33:53,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 17:33:53,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (1/1) ... [2022-02-20 17:33:53,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:33:53,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:33:53,049 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) [2022-02-20 17:33:53,057 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 [2022-02-20 17:33:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 17:33:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-02-20 17:33:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-20 17:33:53,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-20 17:33:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 17:33:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 17:33:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 17:33:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 17:33:53,116 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 17:33:53,118 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 17:33:56,078 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 17:33:56,083 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 17:33:56,083 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 17:33:56,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:33:56 BoogieIcfgContainer [2022-02-20 17:33:56,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 17:33:56,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 17:33:56,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 17:33:56,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 17:33:56,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 05:33:52" (1/3) ... [2022-02-20 17:33:56,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77141263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:33:56, skipping insertion in model container [2022-02-20 17:33:56,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:33:52" (2/3) ... [2022-02-20 17:33:56,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77141263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:33:56, skipping insertion in model container [2022-02-20 17:33:56,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:33:56" (3/3) ... [2022-02-20 17:33:56,098 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_valuebound20.i [2022-02-20 17:33:56,102 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 17:33:56,102 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-20 17:33:56,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 17:33:56,136 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-20 17:33:56,136 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-20 17:33:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:33:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-20 17:33:56,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:33:56,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:33:56,152 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:33:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:33:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 919095715, now seen corresponding path program 1 times [2022-02-20 17:33:56,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 17:33:56,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730759545] [2022-02-20 17:33:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:33:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 17:33:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 17:33:56,167 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) [2022-02-20 17:33:56,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-02-20 17:33:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:33:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2022-02-20 17:33:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:33:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 17:33:56,844 INFO L290 TraceCheckUtils]: 0: Hoare triple {34#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0bv32, 0bv32;assume 0bv1 == #valid[0bv32];assume ~bvult32(0bv32, #StackHeapBarrier);currentRoundingMode := ~roundNearestTiesToEven;call #Ultimate.allocInit(2bv32, 1bv32);call write~init~intINTTYPE1(48bv8, 1bv32, 0bv32, 1bv32);call write~init~intINTTYPE1(0bv8, 1bv32, 1bv32, 1bv32);call #Ultimate.allocInit(8bv32, 2bv32); {34#true} is VALID [2022-02-20 17:33:56,844 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~nondet3#1, main_~n~0#1, main_~a~0#1, main_~r~0#1, main_~k~0#1, main_~q~0#1, main_~d~0#1, main_~s~0#1, main_~t~0#1;havoc main_~n~0#1;havoc main_~a~0#1;havoc main_~r~0#1;havoc main_~k~0#1;havoc main_~q~0#1;havoc main_~d~0#1;havoc main_~s~0#1;havoc main_~t~0#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; {34#true} is VALID [2022-02-20 17:33:56,844 INFO L272 TraceCheckUtils]: 2: Hoare triple {34#true} call assume_abort_if_not((if ~bvuge32(main_~n~0#1, 0bv32) && ~bvule32(main_~n~0#1, 20bv32) then 1bv32 else 0bv32)); {34#true} is VALID [2022-02-20 17:33:56,845 INFO L290 TraceCheckUtils]: 3: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-02-20 17:33:56,845 INFO L290 TraceCheckUtils]: 4: Hoare triple {34#true} assume 0bv32 == ~cond;assume false; {35#false} is VALID [2022-02-20 17:33:56,845 INFO L290 TraceCheckUtils]: 5: Hoare triple {35#false} assume true; {35#false} is VALID [2022-02-20 17:33:56,846 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {35#false} {34#true} #70#return; {35#false} is VALID [2022-02-20 17:33:56,846 INFO L290 TraceCheckUtils]: 7: Hoare triple {35#false} main_~a~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; {35#false} is VALID [2022-02-20 17:33:56,846 INFO L272 TraceCheckUtils]: 8: Hoare triple {35#false} call assume_abort_if_not((if ~bvuge32(main_~a~0#1, 0bv32) && ~bvule32(main_~a~0#1, 20bv32) then 1bv32 else 0bv32)); {35#false} is VALID [2022-02-20 17:33:56,846 INFO L290 TraceCheckUtils]: 9: Hoare triple {35#false} ~cond := #in~cond; {35#false} is VALID [2022-02-20 17:33:56,847 INFO L290 TraceCheckUtils]: 10: Hoare triple {35#false} assume 0bv32 == ~cond;assume false; {35#false} is VALID [2022-02-20 17:33:56,847 INFO L290 TraceCheckUtils]: 11: Hoare triple {35#false} assume true; {35#false} is VALID [2022-02-20 17:33:56,847 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {35#false} {35#false} #72#return; {35#false} is VALID [2022-02-20 17:33:56,847 INFO L272 TraceCheckUtils]: 13: Hoare triple {35#false} call assume_abort_if_not((if ~bvult32(main_~n~0#1, 536870911bv32) then 1bv32 else 0bv32)); {35#false} is VALID [2022-02-20 17:33:56,847 INFO L290 TraceCheckUtils]: 14: Hoare triple {35#false} ~cond := #in~cond; {35#false} is VALID [2022-02-20 17:33:56,848 INFO L290 TraceCheckUtils]: 15: Hoare triple {35#false} assume 0bv32 == ~cond;assume false; {35#false} is VALID [2022-02-20 17:33:56,848 INFO L290 TraceCheckUtils]: 16: Hoare triple {35#false} assume true; {35#false} is VALID [2022-02-20 17:33:56,848 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {35#false} {35#false} #74#return; {35#false} is VALID [2022-02-20 17:33:56,848 INFO L272 TraceCheckUtils]: 18: Hoare triple {35#false} call assume_abort_if_not((if ~bvugt32(main_~a~0#1, 2bv32) then 1bv32 else 0bv32)); {35#false} is VALID [2022-02-20 17:33:56,848 INFO L290 TraceCheckUtils]: 19: Hoare triple {35#false} ~cond := #in~cond; {35#false} is VALID [2022-02-20 17:33:56,848 INFO L290 TraceCheckUtils]: 20: Hoare triple {35#false} assume 0bv32 == ~cond;assume false; {35#false} is VALID [2022-02-20 17:33:56,849 INFO L290 TraceCheckUtils]: 21: Hoare triple {35#false} assume true; {35#false} is VALID [2022-02-20 17:33:56,849 INFO L284 TraceCheckUtils]: 22: Hoare quadruple {35#false} {35#false} #76#return; {35#false} is VALID [2022-02-20 17:33:56,849 INFO L290 TraceCheckUtils]: 23: Hoare triple {35#false} main_~d~0#1 := main_~a~0#1;main_~r~0#1 := ~bvurem32(main_~n~0#1, main_~d~0#1);main_~t~0#1 := 0bv32;main_~k~0#1 := ~bvurem32(main_~n~0#1, ~bvsub32(main_~d~0#1, 2bv32));main_~q~0#1 := ~bvmul32(4bv32, ~bvsub32(~bvudiv32(main_~n~0#1, ~bvsub32(main_~d~0#1, 2bv32)), ~bvudiv32(main_~n~0#1, main_~d~0#1)));main_~s~0#1 := ~convertDOUBLEToUINT(~roundTowardZero, ~fp.sqrt~DOUBLE(currentRoundingMode, ~convertUINTToDOUBLE(currentRoundingMode, main_~n~0#1))); {35#false} is VALID [2022-02-20 17:33:56,849 INFO L290 TraceCheckUtils]: 24: Hoare triple {35#false} assume !false; {35#false} is VALID [2022-02-20 17:33:56,850 INFO L272 TraceCheckUtils]: 25: Hoare triple {35#false} call __VERIFIER_assert((if ~bvadd32(~bvadd32(~bvsub32(~bvsub32(~bvmul32(~bvmul32(main_~d~0#1, main_~d~0#1), main_~q~0#1), ~bvmul32(~bvmul32(2bv32, main_~q~0#1), main_~d~0#1)), ~bvmul32(~bvmul32(4bv32, main_~r~0#1), main_~d~0#1)), ~bvmul32(~bvmul32(4bv32, main_~k~0#1), main_~d~0#1)), ~bvmul32(8bv32, main_~r~0#1)) == ~bvmul32(8bv32, main_~n~0#1) then 1bv32 else 0bv32)); {35#false} is VALID [2022-02-20 17:33:56,850 INFO L290 TraceCheckUtils]: 26: Hoare triple {35#false} ~cond := #in~cond; {35#false} is VALID [2022-02-20 17:33:56,850 INFO L290 TraceCheckUtils]: 27: Hoare triple {35#false} assume 0bv32 == ~cond; {35#false} is VALID [2022-02-20 17:33:56,850 INFO L290 TraceCheckUtils]: 28: Hoare triple {35#false} assume !false; {35#false} is VALID [2022-02-20 17:33:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-20 17:33:56,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 17:33:56,852 INFO L144 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-02-20 17:33:56,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730759545] [2022-02-20 17:33:56,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730759545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 17:33:56,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 17:33:56,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-20 17:33:56,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094674726] [2022-02-20 17:33:56,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 17:33:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-20 17:33:56,862 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:33:56,864 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:33:58,333 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 22 edges. 22 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:33:58,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-20 17:33:58,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-02-20 17:33:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-20 17:33:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:33:58,371 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:34:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:34:02,703 INFO L93 Difference]: Finished difference Result 59 states and 92 transitions. [2022-02-20 17:34:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 17:34:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-20 17:34:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:34:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:34:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 92 transitions. [2022-02-20 17:34:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:34:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 92 transitions. [2022-02-20 17:34:02,716 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 92 transitions. [2022-02-20 17:34:06,022 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 92 edges. 92 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:34:06,028 INFO L225 Difference]: With dead ends: 59 [2022-02-20 17:34:06,028 INFO L226 Difference]: Without dead ends: 27 [2022-02-20 17:34:06,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:34:06,033 INFO L933 BasicCegarLoop]: 40 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, 40 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 [2022-02-20 17:34:06,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 17:34:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-20 17:34:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-20 17:34:06,053 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:34:06,054 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:34:06,054 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:34:06,055 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:34:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:34:06,058 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-02-20 17:34:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-02-20 17:34:06,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:34:06,059 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:34:06,059 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand 27 states. [2022-02-20 17:34:06,059 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand 27 states. [2022-02-20 17:34:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:34:06,062 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-02-20 17:34:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-02-20 17:34:06,063 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:34:06,063 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:34:06,063 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:34:06,063 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:34:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:34:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-02-20 17:34:06,066 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 29 [2022-02-20 17:34:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:34:06,066 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-02-20 17:34:06,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:34:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-02-20 17:34:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-20 17:34:06,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:34:06,068 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:34:06,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-02-20 17:34:06,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-02-20 17:34:06,278 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:34:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:34:06,279 INFO L85 PathProgramCache]: Analyzing trace with hash -960358297, now seen corresponding path program 1 times [2022-02-20 17:34:06,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 17:34:06,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465330782] [2022-02-20 17:34:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:34:06,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 17:34:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 17:34:06,281 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) [2022-02-20 17:34:06,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-02-20 17:34:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:34:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-20 17:34:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:34:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates...