./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF --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 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:37:44,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:37:44,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:37:45,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:37:45,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:37:45,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:37:45,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:37:45,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:37:45,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:37:45,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:37:45,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:37:45,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:37:45,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:37:45,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:37:45,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:37:45,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:37:45,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:37:45,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:37:45,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:37:45,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:37:45,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:37:45,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:37:45,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:37:45,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:37:45,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:37:45,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:37:45,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:37:45,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:37:45,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:37:45,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:37:45,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:37:45,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:37:45,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:37:45,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:37:45,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:37:45,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:37:45,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:37:45,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:37:45,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:37:45,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:37:45,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:37:45,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:37:45,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:37:45,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:37:45,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:37:45,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:37:45,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:37:45,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:37:45,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:37:45,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:37:45,174 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:37:45,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:37:45,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:37:45,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:37:45,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:37:45,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:37:45,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:37:45,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:37:45,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:37:45,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:37:45,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:37:45,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:37:45,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:37:45,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:37:45,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:37:45,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:37:45,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:37:45,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:37:45,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:37:45,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:37:45,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:37:45,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:37:45,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:37:45,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:37:45,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:37:45,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:37:45,183 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 [2021-11-20 07:37:45,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:37:45,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:37:45,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:37:45,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:37:45,543 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:37:45,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-20 07:37:45,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/7ac599c8d/de76878cf5274da4925c4b9fa3eae7bb/FLAG5d820afe9 [2021-11-20 07:37:46,225 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:37:46,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-20 07:37:46,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/7ac599c8d/de76878cf5274da4925c4b9fa3eae7bb/FLAG5d820afe9 [2021-11-20 07:37:46,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/7ac599c8d/de76878cf5274da4925c4b9fa3eae7bb [2021-11-20 07:37:46,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:37:46,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:37:46,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:37:46,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:37:46,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:37:46,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:37:46" (1/1) ... [2021-11-20 07:37:46,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648bb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:46, skipping insertion in model container [2021-11-20 07:37:46,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:37:46" (1/1) ... [2021-11-20 07:37:46,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:37:46,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:37:46,821 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2021-11-20 07:37:46,854 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:846) 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:1434) 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:730) 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:1385) 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:1069) 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:1456) 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:3268) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2342) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:595) 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) [2021-11-20 07:37:46,862 INFO L158 Benchmark]: Toolchain (without parser) took 288.57ms. Allocated memory is still 132.1MB. Free memory was 102.1MB in the beginning and 110.2MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:37:46,864 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 90.2MB. Free memory was 45.8MB in the beginning and 45.7MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:37:46,865 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.21ms. Allocated memory is still 132.1MB. Free memory was 101.8MB in the beginning and 110.2MB in the end (delta: -8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:37:46,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 90.2MB. Free memory was 45.8MB in the beginning and 45.7MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.21ms. Allocated memory is still 132.1MB. Free memory was 101.8MB in the beginning and 110.2MB in the end (delta: -8.4MB). 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:846) 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=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF --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 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:37:49,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:37:49,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:37:49,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:37:49,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:37:49,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:37:49,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:37:49,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:37:49,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:37:49,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:37:49,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:37:49,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:37:49,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:37:49,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:37:49,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:37:49,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:37:49,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:37:49,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:37:50,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:37:50,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:37:50,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:37:50,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:37:50,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:37:50,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:37:50,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:37:50,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:37:50,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:37:50,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:37:50,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:37:50,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:37:50,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:37:50,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:37:50,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:37:50,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:37:50,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:37:50,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:37:50,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:37:50,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:37:50,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:37:50,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:37:50,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:37:50,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 07:37:50,113 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:37:50,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:37:50,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:37:50,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:37:50,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:37:50,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:37:50,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:37:50,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:37:50,118 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:37:50,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:37:50,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:37:50,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:37:50,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:37:50,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:37:50,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:37:50,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:37:50,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:37:50,122 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 07:37:50,122 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 07:37:50,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:37:50,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:37:50,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:37:50,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:37:50,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:37:50,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:37:50,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:37:50,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:37:50,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:37:50,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:37:50,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:37:50,125 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 07:37:50,126 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 07:37:50,126 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:37:50,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:37:50,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:37:50,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:37:50,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 07:37:50,128 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 [2021-11-20 07:37:50,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:37:50,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:37:50,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:37:50,642 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:37:50,643 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:37:50,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-20 07:37:50,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/8cfcfb9ff/bde016def0e341128caa2cad35e74156/FLAG7ab28d2ce [2021-11-20 07:37:51,546 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:37:51,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-20 07:37:51,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/8cfcfb9ff/bde016def0e341128caa2cad35e74156/FLAG7ab28d2ce [2021-11-20 07:37:51,823 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/data/8cfcfb9ff/bde016def0e341128caa2cad35e74156 [2021-11-20 07:37:51,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:37:51,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:37:51,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:37:51,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:37:51,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:37:51,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:37:51" (1/1) ... [2021-11-20 07:37:51,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1c320d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:51, skipping insertion in model container [2021-11-20 07:37:51,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:37:51" (1/1) ... [2021-11-20 07:37:51,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:37:51,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:37:52,087 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2021-11-20 07:37:52,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:37:52,160 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:37:52,178 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2021-11-20 07:37:52,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:37:52,224 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:37:52,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52 WrapperNode [2021-11-20 07:37:52,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:37:52,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:37:52,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:37:52,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:37:52,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,291 INFO L137 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2021-11-20 07:37:52,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:37:52,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:37:52,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:37:52,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:37:52,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:37:52,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:37:52,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:37:52,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:37:52,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (1/1) ... [2021-11-20 07:37:52,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:37:52,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:52,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:37:52,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:37:52,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:37:52,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 07:37:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:37:52,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:37:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:37:52,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:37:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:37:52,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:37:52,543 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:37:52,545 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:37:56,086 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:37:56,096 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:37:56,097 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:37:56,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:37:56 BoogieIcfgContainer [2021-11-20 07:37:56,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:37:56,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:37:56,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:37:56,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:37:56,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:37:51" (1/3) ... [2021-11-20 07:37:56,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e94d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:37:56, skipping insertion in model container [2021-11-20 07:37:56,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:37:52" (2/3) ... [2021-11-20 07:37:56,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e94d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:37:56, skipping insertion in model container [2021-11-20 07:37:56,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:37:56" (3/3) ... [2021-11-20 07:37:56,112 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_unwindbound20.i [2021-11-20 07:37:56,119 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:37:56,120 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:37:56,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:37:56,194 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 [2021-11-20 07:37:56,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:37:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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) [2021-11-20 07:37:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:37:56,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:56,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:56,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1511169482, now seen corresponding path program 1 times [2021-11-20 07:37:56,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:37:56,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438795715] [2021-11-20 07:37:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:56,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:37:56,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:37:56,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:37:56,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:37:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 07:37:56,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:37:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:37:57,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:37:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438795715] [2021-11-20 07:37:57,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438795715] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:57,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:37:57,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-20 07:37:57,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927049254] [2021-11-20 07:37:57,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:57,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:37:57,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:37:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:37:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:37:57,365 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-11-20 07:37:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:57,390 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2021-11-20 07:37:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:37:57,393 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, (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 19 [2021-11-20 07:37:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:57,403 INFO L225 Difference]: With dead ends: 55 [2021-11-20 07:37:57,404 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 07:37:57,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:37:57,413 INFO L933 BasicCegarLoop]: 37 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, 37 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 [2021-11-20 07:37:57,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:37:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 07:37:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 07:37:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2021-11-20 07:37:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-20 07:37:57,456 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 19 [2021-11-20 07:37:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:57,457 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-20 07:37:57,457 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, (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) [2021-11-20 07:37:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-20 07:37:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:37:57,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:57,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:57,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:57,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:37:57,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:57,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1110907126, now seen corresponding path program 1 times [2021-11-20 07:37:57,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:37:57,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721983424] [2021-11-20 07:37:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:57,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:37:57,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:37:57,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:37:57,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c922d7-b0e6-49de-a5a6-c49032b47373/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process