./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:10:31,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:10:31,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:10:31,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:10:31,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:10:31,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:10:31,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:10:31,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:10:31,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:10:31,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:10:31,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:10:31,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:10:31,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:10:31,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:10:31,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:10:31,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:10:31,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:10:31,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:10:31,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:10:31,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:10:31,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:10:31,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:10:31,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:10:31,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:10:31,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:10:31,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:10:31,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:10:31,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:10:31,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:10:31,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:10:31,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:10:31,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:10:31,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:10:31,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:10:31,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:10:31,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:10:31,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:10:31,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:10:31,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:10:31,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:10:31,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:10:31,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:10:31,718 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:10:31,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:10:31,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:10:31,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:10:31,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:10:31,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:10:31,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:10:31,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:10:31,721 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:10:31,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:10:31,721 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:10:31,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:10:31,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:10:31,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:10:31,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:10:31,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:10:31,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:10:31,723 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:10:31,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:10:31,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:10:31,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:10:31,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:10:31,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:10:31,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:10:31,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:10:31,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:10:31,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:10:31,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:10:31,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:10:31,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:10:31,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:10:31,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:10:31,726 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:10:31,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:10:31,727 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 [2022-11-25 18:10:31,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:10:32,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:10:32,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:10:32,025 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:10:32,026 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:10:32,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2022-11-25 18:10:35,091 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:10:35,278 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:10:35,279 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2022-11-25 18:10:35,287 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data/4712d7ef5/6292ff24e4d14b16b3155f78f27dbea9/FLAG217776985 [2022-11-25 18:10:35,315 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data/4712d7ef5/6292ff24e4d14b16b3155f78f27dbea9 [2022-11-25 18:10:35,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:10:35,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:10:35,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:10:35,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:10:35,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:10:35,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:35" (1/1) ... [2022-11-25 18:10:35,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e09609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:35, skipping insertion in model container [2022-11-25 18:10:35,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:35" (1/1) ... [2022-11-25 18:10:35,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:10:35,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:10:35,610 WARN L237 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_c36c3495-cd55-4d96-9045-e1af1fadcbce/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2022-11-25 18:10:35,628 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:806) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.handleUnaryFloatFunction(StandardFunctionHandler.java:2063) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.translateStandardFunction(StandardFunctionHandler.java:242) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1470) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:267) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:728) 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:1420) 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:1094) 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:1496) 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:3320) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2395) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:600) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 18:10:35,634 INFO L158 Benchmark]: Toolchain (without parser) took 311.19ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 72.3MB in the beginning and 139.5MB in the end (delta: -67.2MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2022-11-25 18:10:35,635 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory was 102.5MB in the beginning and 102.5MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:10:35,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.21ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 72.1MB in the beginning and 139.5MB in the end (delta: -67.4MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2022-11-25 18:10:35,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory was 102.5MB in the beginning and 102.5MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.21ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 72.1MB in the beginning and 139.5MB in the end (delta: -67.4MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructOtherUnaryFloatOperation(IntegerTranslation.java:806) 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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:10:37,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:10:37,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:10:37,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:10:37,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:10:37,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:10:37,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:10:37,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:10:37,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:10:37,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:10:37,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:10:37,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:10:37,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:10:37,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:10:37,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:10:37,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:10:37,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:10:37,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:10:37,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:10:37,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:10:37,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:10:37,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:10:37,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:10:37,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:10:37,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:10:37,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:10:37,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:10:37,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:10:37,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:10:37,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:10:37,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:10:37,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:10:37,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:10:37,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:10:37,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:10:37,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:10:37,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:10:37,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:10:37,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:10:37,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:10:37,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:10:37,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-25 18:10:37,971 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:10:37,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:10:37,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:10:37,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:10:37,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:10:37,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:10:37,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:10:37,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:10:37,974 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:10:37,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:10:37,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:10:37,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:10:37,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:10:37,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:10:37,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:10:37,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:10:37,975 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:10:37,976 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:10:37,976 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:10:37,976 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:10:37,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:10:37,976 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:10:37,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:10:37,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:10:37,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:10:37,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:10:37,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:10:37,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:10:37,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:10:37,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:10:37,978 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:10:37,978 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:10:37,978 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:10:37,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:10:37,979 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:10:37,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:10:37,979 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:10:37,979 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 [2022-11-25 18:10:38,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:10:38,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:10:38,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:10:38,364 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:10:38,365 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:10:38,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2022-11-25 18:10:41,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:10:41,686 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:10:41,687 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2022-11-25 18:10:41,694 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data/d43de671f/4607aee108d8401aa06e784e7c3923ce/FLAG8fd78a045 [2022-11-25 18:10:41,712 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/data/d43de671f/4607aee108d8401aa06e784e7c3923ce [2022-11-25 18:10:41,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:10:41,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:10:41,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:10:41,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:10:41,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:10:41,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:41" (1/1) ... [2022-11-25 18:10:41,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f251dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:41, skipping insertion in model container [2022-11-25 18:10:41,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:41" (1/1) ... [2022-11-25 18:10:41,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:10:41,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:10:41,980 WARN L237 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_c36c3495-cd55-4d96-9045-e1af1fadcbce/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2022-11-25 18:10:42,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:10:42,058 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:10:42,084 WARN L237 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_c36c3495-cd55-4d96-9045-e1af1fadcbce/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2022-11-25 18:10:42,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:10:42,128 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:10:42,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42 WrapperNode [2022-11-25 18:10:42,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:10:42,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:10:42,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:10:42,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:10:42,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,186 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-25 18:10:42,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:10:42,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:10:42,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:10:42,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:10:42,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,224 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:10:42,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:10:42,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:10:42,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:10:42,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (1/1) ... [2022-11-25 18:10:42,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:10:42,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:42,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:10:42,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:10:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:10:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:10:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 18:10:42,332 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 18:10:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:10:42,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:10:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:10:42,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:10:42,430 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:10:42,433 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:10:45,471 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:10:45,491 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:10:45,491 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 18:10:45,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:10:45 BoogieIcfgContainer [2022-11-25 18:10:45,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:10:45,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:10:45,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:10:45,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:10:45,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:10:41" (1/3) ... [2022-11-25 18:10:45,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3234778e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:10:45, skipping insertion in model container [2022-11-25 18:10:45,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:42" (2/3) ... [2022-11-25 18:10:45,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3234778e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:10:45, skipping insertion in model container [2022-11-25 18:10:45,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:10:45" (3/3) ... [2022-11-25 18:10:45,504 INFO L112 eAbstractionObserver]: Analyzing ICFG knuth_unwindbound20.i [2022-11-25 18:10:45,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:10:45,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:10:45,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:10:45,606 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3509e3f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:10:45,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 18:10:45,613 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) [2022-11-25 18:10:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 18:10:45,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:10:45,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:45,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:10:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1511169482, now seen corresponding path program 1 times [2022-11-25 18:10:45,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:10:45,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021569618] [2022-11-25 18:10:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:45,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:10:45,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:10:45,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:10:45,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 18:10:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:46,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 18:10:46,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:10:46,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:10:46,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:10:46,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021569618] [2022-11-25 18:10:46,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021569618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:46,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:46,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:10:46,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081925753] [2022-11-25 18:10:46,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:10:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:10:46,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:10:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:10:46,300 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) [2022-11-25 18:10:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:10:46,331 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2022-11-25 18:10:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:10:46,333 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 [2022-11-25 18:10:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:10:46,341 INFO L225 Difference]: With dead ends: 55 [2022-11-25 18:10:46,342 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 18:10:46,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:10:46,350 INFO L413 NwaCegarLoop]: 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 [2022-11-25 18:10:46,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:10:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 18:10:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 18:10:46,397 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) [2022-11-25 18:10:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-25 18:10:46,401 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 19 [2022-11-25 18:10:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:10:46,401 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-25 18:10:46,402 INFO L496 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) [2022-11-25 18:10:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-25 18:10:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 18:10:46,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:10:46,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:46,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:46,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:10:46,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:10:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1110907126, now seen corresponding path program 1 times [2022-11-25 18:10:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:10:46,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007740777] [2022-11-25 18:10:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:46,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:10:46,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:10:46,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:10:46,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c36c3495-cd55-4d96-9045-e1af1fadcbce/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process