./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.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_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24dd9e35f595841fde27d918f97d639ac1034ccbe1a53bd61bcaaba27340f520 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:12:35,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:12:35,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:12:35,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:12:35,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:12:35,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:12:35,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:12:35,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:12:35,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:12:35,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:12:35,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:12:35,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:12:35,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:12:35,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:12:35,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:12:35,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:12:35,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:12:35,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:12:35,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:12:35,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:12:35,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:12:35,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:12:35,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:12:35,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:12:35,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:12:35,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:12:35,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:12:35,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:12:35,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:12:35,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:12:35,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:12:35,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:12:35,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:12:35,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:12:35,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:12:35,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:12:35,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:12:35,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:12:35,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:12:35,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:12:35,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:12:35,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:12:36,011 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:12:36,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:12:36,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:12:36,013 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:12:36,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:12:36,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:12:36,014 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:12:36,015 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:12:36,015 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:12:36,015 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:12:36,016 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:12:36,016 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:12:36,017 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:12:36,017 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:12:36,017 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:12:36,017 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:12:36,018 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:12:36,018 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:12:36,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:12:36,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:12:36,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:12:36,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:12:36,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:12:36,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:12:36,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:12:36,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:12:36,022 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:12:36,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:12:36,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:12:36,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:12:36,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:12:36,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:12:36,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:36,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:12:36,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:12:36,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:12:36,024 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:12:36,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:12:36,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:12:36,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:12:36,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:12:36,026 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24dd9e35f595841fde27d918f97d639ac1034ccbe1a53bd61bcaaba27340f520 [2021-11-20 23:12:36,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:12:36,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:12:36,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:12:36,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:12:36,341 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:12:36,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i [2021-11-20 23:12:36,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/fbcfc0654/6293356541414a798f1f5cc9a619fec5/FLAG5672b4e0b [2021-11-20 23:12:36,888 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:12:36,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i [2021-11-20 23:12:36,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/fbcfc0654/6293356541414a798f1f5cc9a619fec5/FLAG5672b4e0b [2021-11-20 23:12:37,259 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/fbcfc0654/6293356541414a798f1f5cc9a619fec5 [2021-11-20 23:12:37,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:12:37,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:12:37,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:37,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:12:37,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:12:37,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:37" (1/1) ... [2021-11-20 23:12:37,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46019f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37, skipping insertion in model container [2021-11-20 23:12:37,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:37" (1/1) ... [2021-11-20 23:12:37,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:12:37,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:12:37,489 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_c5da8660-3723-453b-a889-79b391e276d7/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i[948,961] [2021-11-20 23:12:37,509 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 23:12:37,521 INFO L158 Benchmark]: Toolchain (without parser) took 256.26ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 93.5MB in the end (delta: -12.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:12:37,524 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 88.5MB in the beginning and 88.5MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:12:37,526 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.83ms. Allocated memory is still 117.4MB. Free memory was 80.7MB in the beginning and 93.5MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:12:37,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 88.5MB in the beginning and 88.5MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.83ms. Allocated memory is still 117.4MB. Free memory was 80.7MB in the beginning and 93.5MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. 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_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24dd9e35f595841fde27d918f97d639ac1034ccbe1a53bd61bcaaba27340f520 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:12:39,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:12:39,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:12:39,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:12:39,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:12:39,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:12:39,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:12:39,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:12:39,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:12:39,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:12:39,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:12:39,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:12:39,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:12:39,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:12:39,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:12:39,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:12:39,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:12:39,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:12:39,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:12:39,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:12:39,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:12:39,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:12:39,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:12:39,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:12:39,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:12:39,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:12:39,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:12:39,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:12:39,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:12:39,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:12:39,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:12:39,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:12:39,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:12:39,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:12:39,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:12:39,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:12:39,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:12:39,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:12:39,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:12:39,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:12:39,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:12:39,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 23:12:39,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:12:39,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:12:40,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:12:40,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:12:40,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:12:40,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:12:40,001 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:12:40,002 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:12:40,002 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:12:40,002 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:12:40,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:12:40,004 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:12:40,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:12:40,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:12:40,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:12:40,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:12:40,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:12:40,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:12:40,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:12:40,007 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:12:40,007 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:12:40,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:12:40,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:12:40,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:12:40,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:12:40,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:12:40,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:12:40,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:12:40,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:40,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:12:40,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:12:40,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:12:40,010 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:12:40,011 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:12:40,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:12:40,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:12:40,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:12:40,012 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_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24dd9e35f595841fde27d918f97d639ac1034ccbe1a53bd61bcaaba27340f520 [2021-11-20 23:12:40,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:12:40,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:12:40,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:12:40,442 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:12:40,443 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:12:40,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i [2021-11-20 23:12:40,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/38dae7037/7b37bef0dcb841f598546718d21ab82d/FLAG1ecacde1b [2021-11-20 23:12:41,086 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:12:41,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i [2021-11-20 23:12:41,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/38dae7037/7b37bef0dcb841f598546718d21ab82d/FLAG1ecacde1b [2021-11-20 23:12:41,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/data/38dae7037/7b37bef0dcb841f598546718d21ab82d [2021-11-20 23:12:41,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:12:41,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:12:41,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:41,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:12:41,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:12:41,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@607511a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41, skipping insertion in model container [2021-11-20 23:12:41,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:12:41,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:12:41,623 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_c5da8660-3723-453b-a889-79b391e276d7/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i[948,961] [2021-11-20 23:12:41,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:41,691 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:12:41,727 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_c5da8660-3723-453b-a889-79b391e276d7/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound2.i[948,961] [2021-11-20 23:12:41,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:41,790 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:12:41,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41 WrapperNode [2021-11-20 23:12:41,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:41,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:41,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:12:41,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:12:41,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,832 INFO L137 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2021-11-20 23:12:41,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:41,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:12:41,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:12:41,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:12:41,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:12:41,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:12:41,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:12:41,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:12:41,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (1/1) ... [2021-11-20 23:12:41,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:41,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:12:41,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:12:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:12:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:12:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:12:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:12:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:12:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:12:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:12:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:12:42,028 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:12:42,029 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:12:44,817 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:12:44,823 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:12:44,824 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:12:44,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:44 BoogieIcfgContainer [2021-11-20 23:12:44,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:12:44,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:12:44,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:12:44,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:12:44,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:41" (1/3) ... [2021-11-20 23:12:44,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df203f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:44, skipping insertion in model container [2021-11-20 23:12:44,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:41" (2/3) ... [2021-11-20 23:12:44,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df203f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:44, skipping insertion in model container [2021-11-20 23:12:44,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:44" (3/3) ... [2021-11-20 23:12:44,846 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_unwindbound2.i [2021-11-20 23:12:44,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:12:44,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:12:44,910 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:12:44,918 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=FINITE_AUTOMATA, 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 23:12:44,920 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:12:44,951 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 23:12:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:12:44,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:44,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:44,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1511169482, now seen corresponding path program 1 times [2021-11-20 23:12:44,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:12:44,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060625024] [2021-11-20 23:12:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:44,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:12:44,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:12:44,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:12:45,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:12:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 23:12:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:45,593 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 23:12:45,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:12:45,827 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 23:12:45,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:12:45,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060625024] [2021-11-20 23:12:45,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060625024] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:12:45,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:12:45,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-20 23:12:45,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127737045] [2021-11-20 23:12:45,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:45,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:12:45,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:12:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:12:45,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:12:45,895 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 23:12:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:45,922 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2021-11-20 23:12:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:12:45,924 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 23:12:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:45,933 INFO L225 Difference]: With dead ends: 55 [2021-11-20 23:12:45,933 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 23:12:45,937 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 23:12:45,941 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 23:12:45,942 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 23:12:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 23:12:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 23:12:45,978 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 23:12:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-20 23:12:45,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 19 [2021-11-20 23:12:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:45,982 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-20 23:12:45,982 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 23:12:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-20 23:12:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:12:45,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:45,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:46,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:12:46,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:12:46,184 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1110907126, now seen corresponding path program 1 times [2021-11-20 23:12:46,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:12:46,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983572680] [2021-11-20 23:12:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:46,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:12:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:12:46,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:12:46,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da8660-3723-453b-a889-79b391e276d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process