./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH --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 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:07:33,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:07:33,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:07:33,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:07:33,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:07:33,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:07:33,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:07:33,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:07:33,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:07:33,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:07:33,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:07:33,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:07:33,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:07:33,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:07:33,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:07:33,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:07:33,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:07:33,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:07:33,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:07:33,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:07:33,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:07:33,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:07:33,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:07:33,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:07:33,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:07:33,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:07:33,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:07:33,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:07:33,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:07:33,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:07:33,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:07:33,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:07:33,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:07:33,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:07:33,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:07:33,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:07:33,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:07:33,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:07:33,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:07:33,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:07:33,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:07:33,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:07:33,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:07:33,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:07:33,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:07:33,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:07:33,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:07:33,577 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:07:33,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:07:33,577 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:07:33,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:07:33,578 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:07:33,578 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:07:33,578 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:07:33,579 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:07:33,579 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:07:33,586 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:07:33,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:07:33,588 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:07:33,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:07:33,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:07:33,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:07:33,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:07:33,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:07:33,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:07:33,590 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:07:33,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:07:33,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:07:33,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:07:33,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:07:33,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:07:33,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:07:33,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:33,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:07:33,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:07:33,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:07:33,595 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:07:33,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:07:33,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:07:33,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:07:33,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:07:33,598 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_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 [2021-11-03 04:07:33,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:07:33,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:07:33,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:07:33,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:07:33,946 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:07:33,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-03 04:07:34,045 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/7a85f1909/d4a365f5a9ac4f37b0840090ddbf93f7/FLAG791937718 [2021-11-03 04:07:34,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:07:34,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-03 04:07:34,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/7a85f1909/d4a365f5a9ac4f37b0840090ddbf93f7/FLAG791937718 [2021-11-03 04:07:34,893 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/7a85f1909/d4a365f5a9ac4f37b0840090ddbf93f7 [2021-11-03 04:07:34,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:07:34,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:07:34,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:34,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:07:34,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:07:34,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:34" (1/1) ... [2021-11-03 04:07:34,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d5280f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:34, skipping insertion in model container [2021-11-03 04:07:34,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:34" (1/1) ... [2021-11-03 04:07:34,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:07:34,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:07:35,159 WARN L228 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_2f020885-2a51-450b-b585-47b0eefd6b52/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2021-11-03 04:07:35,178 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:1699) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.translateStandardFunction(StandardFunctionHandler.java:236) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1430) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:267) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:729) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1381) 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:1068) 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:372) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1452) 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:3247) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2321) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:594) 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) [2021-11-03 04:07:35,188 INFO L168 Benchmark]: Toolchain (without parser) took 289.00 ms. Allocated memory is still 109.1 MB. Free memory was 72.5 MB in the beginning and 86.4 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:07:35,189 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 109.1 MB. Free memory was 89.3 MB in the beginning and 89.3 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:07:35,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.02 ms. Allocated memory is still 109.1 MB. Free memory was 72.3 MB in the beginning and 86.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:07:35,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 109.1 MB. Free memory was 89.3 MB in the beginning and 89.3 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.02 ms. Allocated memory is still 109.1 MB. Free memory was 72.3 MB in the beginning and 86.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * 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_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH --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 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:07:37,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:07:37,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:07:37,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:07:37,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:07:37,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:07:37,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:07:37,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:07:37,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:07:37,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:07:37,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:07:37,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:07:37,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:07:37,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:07:37,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:07:37,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:07:37,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:07:37,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:07:37,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:07:37,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:07:37,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:07:37,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:07:37,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:07:37,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:07:37,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:07:37,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:07:37,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:07:37,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:07:37,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:07:37,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:07:37,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:07:37,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:07:37,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:07:37,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:07:37,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:07:37,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:07:37,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:07:37,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:07:37,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:07:37,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:07:37,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:07:37,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:07:37,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:07:37,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:07:37,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:07:37,939 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:07:37,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:07:37,940 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:07:37,940 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:07:37,941 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:07:37,941 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:07:37,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:07:37,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:07:37,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:07:37,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:07:37,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:07:37,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:07:37,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:07:37,946 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:07:37,947 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:07:37,947 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:07:37,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:07:37,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:07:37,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:07:37,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:07:37,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:07:37,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:07:37,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:07:37,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:37,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:07:37,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:07:37,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:07:37,951 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:07:37,952 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:07:37,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:07:37,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:07:37,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:07:37,954 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_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953dc8095830260ae835d79f90b96c794426fcd9911aa994e4cb8f2d3bfb6995 [2021-11-03 04:07:38,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:07:38,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:07:38,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:07:38,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:07:38,433 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:07:38,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-03 04:07:38,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/823bae6db/5d366453ce6345f3a6bf9ef76f93bf5a/FLAG728e39fee [2021-11-03 04:07:39,200 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:07:39,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i [2021-11-03 04:07:39,212 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/823bae6db/5d366453ce6345f3a6bf9ef76f93bf5a/FLAG728e39fee [2021-11-03 04:07:39,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/data/823bae6db/5d366453ce6345f3a6bf9ef76f93bf5a [2021-11-03 04:07:39,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:07:39,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:07:39,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:39,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:07:39,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:07:39,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:39,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ed25c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39, skipping insertion in model container [2021-11-03 04:07:39,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:39,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:07:39,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:07:39,732 WARN L228 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_2f020885-2a51-450b-b585-47b0eefd6b52/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2021-11-03 04:07:39,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:39,806 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:07:39,828 WARN L228 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_2f020885-2a51-450b-b585-47b0eefd6b52/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound20.i[948,961] [2021-11-03 04:07:39,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:39,895 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:07:39,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39 WrapperNode [2021-11-03 04:07:39,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:39,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:07:39,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:07:39,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:07:39,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:39,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:39,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:07:39,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:07:39,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:07:39,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:07:40,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:07:40,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:07:40,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:07:40,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:07:40,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (1/1) ... [2021-11-03 04:07:40,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:40,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:07:40,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:07:40,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:07:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:07:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:07:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:07:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:07:43,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:07:43,829 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-03 04:07:43,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:43 BoogieIcfgContainer [2021-11-03 04:07:43,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:07:43,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:07:43,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:07:43,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:07:43,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:07:39" (1/3) ... [2021-11-03 04:07:43,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f421431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:43, skipping insertion in model container [2021-11-03 04:07:43,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:39" (2/3) ... [2021-11-03 04:07:43,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f421431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:43, skipping insertion in model container [2021-11-03 04:07:43,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:43" (3/3) ... [2021-11-03 04:07:43,842 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_unwindbound20.i [2021-11-03 04:07:43,848 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:07:43,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-03 04:07:43,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:07:43,908 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 [2021-11-03 04:07:43,908 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-03 04:07:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:07:43,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:07:43,933 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:07:43,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 04:07:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:07:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1236199694, now seen corresponding path program 1 times [2021-11-03 04:07:43,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:07:43,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798303054] [2021-11-03 04:07:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:07:43,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:07:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:07:43,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:07:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:07:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:07:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:07:44,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:07:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:07:44,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:07:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:07:44,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:07:44,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798303054] [2021-11-03 04:07:44,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798303054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:07:44,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:07:44,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:07:44,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033414946] [2021-11-03 04:07:44,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:07:44,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:07:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:07:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:07:44,671 INFO L87 Difference]: Start difference. First operand has 31 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:07:44,697 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2021-11-03 04:07:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:07:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:07:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:07:44,713 INFO L225 Difference]: With dead ends: 59 [2021-11-03 04:07:44,713 INFO L226 Difference]: Without dead ends: 27 [2021-11-03 04:07:44,717 INFO L786 BasicCegarLoop]: 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 [2021-11-03 04:07:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-03 04:07:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-03 04:07:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-03 04:07:44,748 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2021-11-03 04:07:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:07:44,748 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-03 04:07:44,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-03 04:07:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:07:44,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:07:44,750 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:07:44,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 04:07:44,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:07:44,951 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 04:07:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:07:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-11-03 04:07:44,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:07:44,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364798396] [2021-11-03 04:07:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:07:44,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:07:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:07:44,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:07:44,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f020885-2a51-450b-b585-47b0eefd6b52/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process