./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:13:57,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:13:57,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:13:57,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:13:57,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:13:57,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:13:57,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:13:57,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:13:57,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:13:57,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:13:57,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:13:57,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:13:57,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:13:57,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:13:57,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:13:57,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:13:57,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:13:57,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:13:57,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:13:57,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:13:57,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:13:57,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:13:57,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:13:57,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:13:57,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:13:57,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:13:57,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:13:57,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:13:57,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:13:57,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:13:57,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:13:57,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:13:57,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:13:57,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:13:57,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:13:57,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:13:57,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:13:57,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:13:57,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:13:57,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:13:57,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:13:57,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-12-13 13:13:57,704 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:13:57,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:13:57,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:13:57,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:13:57,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:13:57,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:13:57,706 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:13:57,706 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-12-13 13:13:57,707 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-12-13 13:13:57,707 INFO L138 SettingsManager]: * Use old map elimination=false [2022-12-13 13:13:57,707 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-12-13 13:13:57,707 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-12-13 13:13:57,707 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-12-13 13:13:57,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:13:57,708 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:13:57,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:13:57,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:13:57,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-12-13 13:13:57,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-12-13 13:13:57,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-12-13 13:13:57,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:13:57,709 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-12-13 13:13:57,709 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:13:57,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-12-13 13:13:57,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:13:57,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:13:57,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:13:57,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:13:57,710 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-12-13 13:13:57,710 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a [2022-12-13 13:13:57,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:13:57,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:13:57,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:13:57,898 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:13:57,898 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:13:57,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2022-12-13 13:14:00,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:14:00,621 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:14:00,621 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2022-12-13 13:14:00,625 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/data/ea1340af8/08f09460a1a04f16834bec6dcdd2e599/FLAG2dd654d9e [2022-12-13 13:14:00,637 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/data/ea1340af8/08f09460a1a04f16834bec6dcdd2e599 [2022-12-13 13:14:00,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:14:00,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:14:00,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:14:00,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:14:00,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:14:00,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a448353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00, skipping insertion in model container [2022-12-13 13:14:00,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:14:00,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:14:00,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:14:00,776 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:14:00,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:14:00,795 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:14:00,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00 WrapperNode [2022-12-13 13:14:00,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:14:00,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:14:00,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:14:00,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:14:00,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,819 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9 [2022-12-13 13:14:00,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:14:00,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:14:00,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:14:00,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:14:00,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,831 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:14:00,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:14:00,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:14:00,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:14:00,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (1/1) ... [2022-12-13 13:14:00,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 13:14:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:00,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 13:14:00,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-12-13 13:14:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-12-13 13:14:00,893 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-12-13 13:14:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-12-13 13:14:00,894 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-12-13 13:14:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:14:00,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:14:00,942 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:14:00,943 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:14:01,011 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:14:01,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:14:01,018 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 13:14:01,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:14:01 BoogieIcfgContainer [2022-12-13 13:14:01,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:14:01,021 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-12-13 13:14:01,021 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-12-13 13:14:01,025 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-12-13 13:14:01,026 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-12-13 13:14:01,026 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.12 01:14:00" (1/3) ... [2022-12-13 13:14:01,028 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5a2df1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.12 01:14:01, skipping insertion in model container [2022-12-13 13:14:01,028 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-12-13 13:14:01,028 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:14:00" (2/3) ... [2022-12-13 13:14:01,029 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5a2df1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.12 01:14:01, skipping insertion in model container [2022-12-13 13:14:01,029 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-12-13 13:14:01,029 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:14:01" (3/3) ... [2022-12-13 13:14:01,030 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2022-12-13 13:14:01,080 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-12-13 13:14:01,080 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-12-13 13:14:01,080 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-12-13 13:14:01,080 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-12-13 13:14:01,081 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-12-13 13:14:01,081 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-12-13 13:14:01,081 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-12-13 13:14:01,081 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-12-13 13:14:01,085 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:14:01,106 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-12-13 13:14:01,107 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 13:14:01,107 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 13:14:01,113 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-12-13 13:14:01,113 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:01,113 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-12-13 13:14:01,114 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:14:01,117 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-12-13 13:14:01,117 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 13:14:01,117 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 13:14:01,118 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-12-13 13:14:01,118 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:01,125 INFO L748 eck$LassoCheckResult]: Stem: 21#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 13#L26true assume !!(main_~x~0#1 <= 2147483646); 8#L27true call main_#t~ret6#1 := rec2(main_~x~0#1);< 7#$Ultimate##0true [2022-12-13 13:14:01,126 INFO L750 eck$LassoCheckResult]: Loop: 7#$Ultimate##0true ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(1 + ~j);< 4#$Ultimate##0true ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 15#rec1FINALtrue assume true; 16#rec1EXITtrue >#39#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3);< 7#$Ultimate##0true [2022-12-13 13:14:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:01,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 1 times [2022-12-13 13:14:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686356028] [2022-12-13 13:14:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,223 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:14:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:14:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash -931063642, now seen corresponding path program 1 times [2022-12-13 13:14:01,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:01,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026085243] [2022-12-13 13:14:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:01,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:14:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:01,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026085243] [2022-12-13 13:14:01,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026085243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:01,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:01,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:14:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816022568] [2022-12-13 13:14:01,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:01,389 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-12-13 13:14:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:14:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:14:01,414 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:14:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:14:01,476 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-12-13 13:14:01,477 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 36 transitions. [2022-12-13 13:14:01,479 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-12-13 13:14:01,483 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 18 states and 24 transitions. [2022-12-13 13:14:01,484 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2022-12-13 13:14:01,484 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-12-13 13:14:01,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2022-12-13 13:14:01,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:01,486 INFO L218 hiAutomatonCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-13 13:14:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2022-12-13 13:14:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-13 13:14:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 13:14:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-12-13 13:14:01,507 INFO L240 hiAutomatonCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-13 13:14:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:14:01,510 INFO L428 stractBuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-13 13:14:01,511 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-12-13 13:14:01,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 24 transitions. [2022-12-13 13:14:01,511 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-12-13 13:14:01,512 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 13:14:01,512 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 13:14:01,512 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-12-13 13:14:01,512 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:01,513 INFO L748 eck$LassoCheckResult]: Stem: 83#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 80#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 79#L26 assume !!(main_~x~0#1 <= 2147483646); 68#L27 call main_#t~ret6#1 := rec2(main_~x~0#1);< 69#$Ultimate##0 [2022-12-13 13:14:01,513 INFO L750 eck$LassoCheckResult]: Loop: 69#$Ultimate##0 ~j := #in~j; 76#L18 assume !(~j <= 0); 71#L20 call #t~ret3 := rec1(1 + ~j);< 70#$Ultimate##0 ~i := #in~i; 75#L12 assume !(~i <= 0); 72#L14 call #t~ret0 := rec1(~i - 2);< 70#$Ultimate##0 ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 81#rec1FINAL assume true; 82#rec1EXIT >#33#return; 73#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 70#$Ultimate##0 ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 81#rec1FINAL assume true; 82#rec1EXIT >#35#return; 74#L14-2 call #t~ret2 := rec1(#t~ret1);< 70#$Ultimate##0 ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 81#rec1FINAL assume true; 82#rec1EXIT >#37#return; 77#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 78#rec1FINAL assume true; 84#rec1EXIT >#39#return; 67#L20-1 call #t~ret4 := rec2(#t~ret3);< 69#$Ultimate##0 [2022-12-13 13:14:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 2 times [2022-12-13 13:14:01,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:01,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972144439] [2022-12-13 13:14:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:01,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,517 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:14:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:14:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1852060604, now seen corresponding path program 1 times [2022-12-13 13:14:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027533080] [2022-12-13 13:14:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,531 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:14:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,541 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:14:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2035496338, now seen corresponding path program 1 times [2022-12-13 13:14:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:01,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035493095] [2022-12-13 13:14:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:14:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,562 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:14:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,883 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:14:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.12 01:14:01 BoogieIcfgContainer [2022-12-13 13:14:01,908 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-12-13 13:14:01,908 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 13:14:01,908 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 13:14:01,908 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 13:14:01,909 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:14:01" (3/4) ... [2022-12-13 13:14:01,910 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-12-13 13:14:01,942 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 13:14:01,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 13:14:01,943 INFO L158 Benchmark]: Toolchain (without parser) took 1302.11ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 111.1MB in the beginning and 137.6MB in the end (delta: -26.5MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2022-12-13 13:14:01,944 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 146.8MB. Free memory is still 117.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:14:01,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.40ms. Allocated memory is still 146.8MB. Free memory was 110.6MB in the beginning and 101.7MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:14:01,945 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.33ms. Allocated memory is still 146.8MB. Free memory was 101.7MB in the beginning and 100.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:14:01,946 INFO L158 Benchmark]: Boogie Preprocessor took 12.93ms. Allocated memory is still 146.8MB. Free memory was 100.6MB in the beginning and 99.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:14:01,946 INFO L158 Benchmark]: RCFGBuilder took 187.38ms. Allocated memory is still 146.8MB. Free memory was 99.6MB in the beginning and 90.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 13:14:01,947 INFO L158 Benchmark]: BuchiAutomizer took 886.43ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 90.1MB in the beginning and 139.7MB in the end (delta: -49.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:14:01,948 INFO L158 Benchmark]: Witness Printer took 34.22ms. Allocated memory is still 176.2MB. Free memory was 139.7MB in the beginning and 137.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:14:01,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 146.8MB. Free memory is still 117.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 154.40ms. Allocated memory is still 146.8MB. Free memory was 110.6MB in the beginning and 101.7MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.33ms. Allocated memory is still 146.8MB. Free memory was 101.7MB in the beginning and 100.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.93ms. Allocated memory is still 146.8MB. Free memory was 100.6MB in the beginning and 99.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 187.38ms. Allocated memory is still 146.8MB. Free memory was 99.6MB in the beginning and 90.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 886.43ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 90.1MB in the beginning and 139.7MB in the end (delta: -49.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 34.22ms. Allocated memory is still 176.2MB. Free memory was 139.7MB in the beginning and 137.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 18 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.8s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 0.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32 IncrementalHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 26 mSDtfsCounter, 32 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) VAL [x=1] [L27] CALL rec2(x) VAL [\old(j)=1] Loop: [L18] COND FALSE !(j <= 0) [L20] CALL, EXPR rec1(j+1) [L12] COND FALSE !(i <= 0) [L14] CALL, EXPR rec1(i-2) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(rec1(i-2) - 1)) [L14] return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] RET, EXPR rec1(j+1) [L20] CALL rec2(rec1(j+1)) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 17]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) VAL [x=1] [L27] CALL rec2(x) VAL [\old(j)=1] Loop: [L18] COND FALSE !(j <= 0) [L20] CALL, EXPR rec1(j+1) [L12] COND FALSE !(i <= 0) [L14] CALL, EXPR rec1(i-2) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(rec1(i-2) - 1)) [L14] return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] RET, EXPR rec1(j+1) [L20] CALL rec2(rec1(j+1)) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-12-13 13:14:01,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367b9abe-bbb7-4606-945b-02665ecdaa3d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)