./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c86bd149cf8dcec56d0b62aefda03e866c4e374070f20ea19c317a4fa78bf8c1 ........................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:17:39,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:17:39,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:17:39,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:17:39,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:17:39,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:17:39,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:17:39,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:17:39,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:17:39,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:17:39,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:17:39,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:17:39,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:17:39,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:17:39,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:17:39,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:17:39,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:17:39,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:17:39,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:17:39,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:17:39,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:17:39,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:17:39,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:17:39,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:17:39,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:17:39,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:17:39,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:17:39,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:17:39,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:17:39,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:17:39,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:17:39,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:17:39,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:17:39,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:17:39,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:17:39,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:17:39,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:17:39,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:17:39,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:17:39,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:17:39,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:17:39,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-10-21 19:17:39,812 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:17:39,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:17:39,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:17:39,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:17:39,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:17:39,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:17:39,815 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:17:39,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:17:39,816 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:17:39,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:17:39,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:17:39,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:17:39,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:17:39,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:17:39,818 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-21 19:17:39,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:17:39,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:17:39,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:17:39,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:17:39,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:17:39,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:17:39,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:17:39,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:17:39,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:17:39,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:17:39,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:17:39,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:17:39,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:17:39,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:17:39,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c86bd149cf8dcec56d0b62aefda03e866c4e374070f20ea19c317a4fa78bf8c1 [2021-10-21 19:17:40,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:17:40,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:17:40,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:17:40,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:17:40,189 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:17:40,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c [2021-10-21 19:17:40,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/data/f832f8187/7651823ce7824d0d9b9df0086864b6de/FLAG897cb7aed [2021-10-21 19:17:40,843 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:17:40,844 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-1.c [2021-10-21 19:17:40,856 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/data/f832f8187/7651823ce7824d0d9b9df0086864b6de/FLAG897cb7aed [2021-10-21 19:17:41,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/data/f832f8187/7651823ce7824d0d9b9df0086864b6de [2021-10-21 19:17:41,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:17:41,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:17:41,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:17:41,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:17:41,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:17:41,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd0147e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41, skipping insertion in model container [2021-10-21 19:17:41,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:17:41,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:17:41,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:17:41,452 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:17:41,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:17:41,506 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:17:41,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41 WrapperNode [2021-10-21 19:17:41,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:17:41,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:17:41,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:17:41,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:17:41,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:17:41,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:17:41,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:17:41,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:17:41,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:17:41,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:17:41,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:17:41,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:17:41,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (1/1) ... [2021-10-21 19:17:41,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:17:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:41,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:17:41,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:17:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-10-21 19:17:41,691 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-10-21 19:17:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-10-21 19:17:41,691 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-10-21 19:17:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:17:41,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:17:41,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:17:41,950 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 19:17:41,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:17:41 BoogieIcfgContainer [2021-10-21 19:17:41,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:17:41,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:17:41,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:17:41,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:17:41,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:17:41" (1/3) ... [2021-10-21 19:17:41,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e0933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:17:41, skipping insertion in model container [2021-10-21 19:17:41,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:17:41" (2/3) ... [2021-10-21 19:17:41,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e0933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:17:41, skipping insertion in model container [2021-10-21 19:17:41,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:17:41" (3/3) ... [2021-10-21 19:17:41,974 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1a-1.c [2021-10-21 19:17:41,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:17:41,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-21 19:17:42,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:17:42,049 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 [2021-10-21 19:17:42,049 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-21 19:17:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.48) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-21 19:17:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-21 19:17:42,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:42,073 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-21 19:17:42,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-10-21 19:17:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash 70122184, now seen corresponding path program 1 times [2021-10-21 19:17:42,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:42,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718048673] [2021-10-21 19:17:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:42,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:17:42,183 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:17:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:17:42,206 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:17:42,208 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:17:42,209 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-21 19:17:42,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:17:42,223 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:17:42,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:17:42 BoogieIcfgContainer [2021-10-21 19:17:42,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:17:42,242 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:17:42,242 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:17:42,242 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:17:42,243 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:17:41" (3/4) ... [2021-10-21 19:17:42,245 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:17:42,277 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:17:42,277 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:17:42,279 INFO L168 Benchmark]: Toolchain (without parser) took 1068.87 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 55.7 MB in the beginning and 70.8 MB in the end (delta: -15.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:42,280 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory is still 41.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:17:42,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.00 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 55.5 MB in the beginning and 96.4 MB in the end (delta: -40.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:42,281 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.63 ms. Allocated memory is still 119.5 MB. Free memory was 96.4 MB in the beginning and 95.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:17:42,282 INFO L168 Benchmark]: Boogie Preprocessor took 32.92 ms. Allocated memory is still 119.5 MB. Free memory was 95.2 MB in the beginning and 94.3 MB in the end (delta: 922.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:42,283 INFO L168 Benchmark]: RCFGBuilder took 379.14 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 85.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:42,284 INFO L168 Benchmark]: TraceAbstraction took 274.25 ms. Allocated memory is still 119.5 MB. Free memory was 84.7 MB in the beginning and 72.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:42,284 INFO L168 Benchmark]: Witness Printer took 35.37 ms. Allocated memory is still 119.5 MB. Free memory was 72.2 MB in the beginning and 70.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:42,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory is still 41.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.00 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 55.5 MB in the beginning and 96.4 MB in the end (delta: -40.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.63 ms. Allocated memory is still 119.5 MB. Free memory was 96.4 MB in the beginning and 95.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.92 ms. Allocated memory is still 119.5 MB. Free memory was 95.2 MB in the beginning and 94.3 MB in the end (delta: 922.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 379.14 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 85.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 274.25 ms. Allocated memory is still 119.5 MB. Free memory was 84.7 MB in the beginning and 72.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 35.37 ms. Allocated memory is still 119.5 MB. Free memory was 72.2 MB in the beginning and 70.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L24] int x = __VERIFIER_nondet_int(); [L25] CALL rec2(x) VAL [\old(j)=2147483647] [L18] COND FALSE !(j <= 0) VAL [\old(j)=2147483647, j=2147483647] [L20] j+1 VAL [\old(j)=2147483647, j=2147483647] - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 181.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 9.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.1ms SsaConstructionTime, 22.7ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:17:42,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9b81fcd-e6a1-4290-a876-4cd7579758c8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...