./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer --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 1b7166d94206693c3f254a3c1de8d5825f8510fb ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:22:08,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:22:08,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:22:08,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:22:08,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:22:08,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:22:08,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:22:08,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:22:08,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:22:08,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:22:08,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:22:08,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:22:08,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:22:08,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:22:08,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:22:08,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:22:08,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:22:08,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:22:08,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:22:08,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:22:08,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:22:08,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:22:08,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:22:08,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:22:08,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:22:08,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:22:08,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:22:08,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:22:08,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:22:08,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:22:08,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:22:08,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:22:08,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:22:08,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:22:08,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:22:08,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:22:08,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:22:08,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:22:08,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:22:08,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:22:08,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:22:08,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 18:22:08,870 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:22:08,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:22:08,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:22:08,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:22:08,871 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:22:08,871 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 18:22:08,871 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 18:22:08,871 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 18:22:08,871 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 18:22:08,871 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 18:22:08,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 18:22:08,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:22:08,873 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 18:22:08,873 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:22:08,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 18:22:08,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:22:08,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:22:08,873 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 18:22:08,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:22:08,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:22:08,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:22:08,874 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 18:22:08,874 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 18:22:08,874 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer 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 -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2019-12-07 18:22:08,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:22:08,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:22:08,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:22:08,984 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:22:08,984 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:22:08,984 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-12-07 18:22:09,022 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/data/47c6fb289/f34a25625f4e44cd8d20e044dbfb97b0/FLAG97880f884 [2019-12-07 18:22:09,371 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:22:09,371 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-12-07 18:22:09,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/data/47c6fb289/f34a25625f4e44cd8d20e044dbfb97b0/FLAG97880f884 [2019-12-07 18:22:09,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/data/47c6fb289/f34a25625f4e44cd8d20e044dbfb97b0 [2019-12-07 18:22:09,386 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:22:09,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:22:09,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:22:09,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:22:09,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:22:09,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f50cffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09, skipping insertion in model container [2019-12-07 18:22:09,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:22:09,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:22:09,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:22:09,508 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:22:09,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:22:09,557 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:22:09,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09 WrapperNode [2019-12-07 18:22:09,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:22:09,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:22:09,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:22:09,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:22:09,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:22:09,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:22:09,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:22:09,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:22:09,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... [2019-12-07 18:22:09,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:22:09,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:22:09,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:22:09,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:22:09,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:09,627 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-12-07 18:22:09,627 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-12-07 18:22:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:22:09,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:22:09,712 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:22:09,712 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 18:22:09,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:22:09 BoogieIcfgContainer [2019-12-07 18:22:09,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:22:09,714 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 18:22:09,714 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 18:22:09,716 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 18:22:09,716 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:22:09,716 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 06:22:09" (1/3) ... [2019-12-07 18:22:09,717 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1d416d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:22:09, skipping insertion in model container [2019-12-07 18:22:09,717 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:22:09,717 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:22:09" (2/3) ... [2019-12-07 18:22:09,718 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1d416d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:22:09, skipping insertion in model container [2019-12-07 18:22:09,718 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:22:09,718 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:22:09" (3/3) ... [2019-12-07 18:22:09,719 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2019-12-07 18:22:09,748 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 18:22:09,748 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 18:22:09,748 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 18:22:09,748 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:22:09,749 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:22:09,749 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 18:22:09,749 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:22:09,749 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 18:22:09,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-12-07 18:22:09,773 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 18:22:09,774 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:22:09,774 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:22:09,778 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-12-07 18:22:09,779 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:22:09,779 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 18:22:09,779 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-12-07 18:22:09,780 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 18:22:09,780 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:22:09,780 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:22:09,781 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-12-07 18:22:09,781 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:22:09,786 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2019-12-07 18:22:09,786 INFO L796 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2019-12-07 18:22:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2019-12-07 18:22:09,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:09,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119163350] [2019-12-07 18:22:09,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:09,862 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2019-12-07 18:22:09,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:09,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289751315] [2019-12-07 18:22:09,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:09,872 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2019-12-07 18:22:09,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:09,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428718914] [2019-12-07 18:22:09,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:09,886 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:09,933 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:22:09,934 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:22:09,934 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:22:09,934 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:22:09,934 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 18:22:09,934 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:09,934 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:22:09,935 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:22:09,935 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2019-12-07 18:22:09,935 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:22:09,935 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:22:09,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:09,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:09,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:09,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:09,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,001 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:22:10,002 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,006 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,013 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,013 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,017 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,017 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,020 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,020 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,024 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,028 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,028 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,032 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,034 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,034 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,038 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,038 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,044 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 18:22:10,045 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,060 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,060 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-1} Honda state: {g_#in~x=-1} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=0}, {g_#in~x=-1}] Lambdas: [9, 10, 1] Nus: [1, 0] [2019-12-07 18:22:10,077 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:22:10,077 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:22:10,077 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:22:10,077 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:22:10,077 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 18:22:10,077 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,077 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:22:10,078 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:22:10,078 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-12-07 18:22:10,078 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:22:10,078 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:22:10,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,144 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:22:10,144 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,147 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,150 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,150 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,154 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,154 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,157 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,157 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,164 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,164 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,166 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,167 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,170 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,170 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,173 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,173 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,177 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,179 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,180 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,183 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,184 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,187 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:10,187 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,191 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,191 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,197 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 18:22:10,197 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:10,208 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 18:22:10,209 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:22:10,209 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:22:10,209 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:22:10,209 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:22:10,209 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 18:22:10,209 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,209 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:22:10,209 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:22:10,209 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-12-07 18:22:10,209 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:22:10,210 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:22:10,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,262 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:22:10,265 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,269 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,270 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,271 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,271 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,271 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,271 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,273 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,273 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,274 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,278 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,279 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,279 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,280 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,280 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,280 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,280 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,280 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,282 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,285 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,286 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,286 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,287 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,287 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,287 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,287 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,287 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,289 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,297 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,298 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,298 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,298 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,298 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,298 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,299 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,299 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,301 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,304 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,305 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,306 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,306 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,306 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,306 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,306 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,307 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,308 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,311 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,313 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,313 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,313 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,313 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,313 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,314 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,314 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,315 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,319 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,320 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,320 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,320 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,321 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,321 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,321 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,322 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,326 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,327 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,327 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,327 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,328 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,328 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,328 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,328 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,330 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,333 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,334 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:10,335 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,335 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:10,335 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,335 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:10,335 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:10,337 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,340 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:10,341 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:10,342 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:10,342 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-12-07 18:22:10,342 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:10,350 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-12-07 18:22:10,350 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-12-07 18:22:10,362 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 18:22:10,382 INFO L443 ModelExtractionUtils]: Simplification made 11 calls to the SMT solver. [2019-12-07 18:22:10,382 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,387 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 18:22:10,391 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-12-07 18:22:10,391 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 18:22:10,392 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2019-12-07 18:22:10,397 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-12-07 18:22:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:10,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:22:10,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:22:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:10,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:22:10,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:22:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:22:10,490 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 18:22:10,491 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2019-12-07 18:22:10,589 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 5 states. Result 35 states and 42 transitions. Complement of second has 13 states. [2019-12-07 18:22:10,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 18:22:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 18:22:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2019-12-07 18:22:10,592 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-12-07 18:22:10,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:22:10,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-12-07 18:22:10,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:22:10,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-12-07 18:22:10,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:22:10,594 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2019-12-07 18:22:10,597 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 18:22:10,601 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2019-12-07 18:22:10,602 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-12-07 18:22:10,602 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2019-12-07 18:22:10,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2019-12-07 18:22:10,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 18:22:10,604 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-12-07 18:22:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2019-12-07 18:22:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-12-07 18:22:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 18:22:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 18:22:10,626 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 18:22:10,626 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 18:22:10,626 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 18:22:10,626 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2019-12-07 18:22:10,627 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 18:22:10,627 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:22:10,627 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:22:10,628 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:22:10,628 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:22:10,628 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2019-12-07 18:22:10,628 INFO L796 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 129#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 129#L12 assume 0 == ~x;#res := 1; 128#gFINAL assume true; 130#gEXIT >#22#return; 125#L15-1 [2019-12-07 18:22:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:10,628 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2019-12-07 18:22:10,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:10,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508374783] [2019-12-07 18:22:10,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:10,638 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2019-12-07 18:22:10,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:10,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600495773] [2019-12-07 18:22:10,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:10,647 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:10,647 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2019-12-07 18:22:10,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:10,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753876044] [2019-12-07 18:22:10,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 18:22:10,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753876044] [2019-12-07 18:22:10,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159163875] [2019-12-07 18:22:10,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:22:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:10,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 18:22:10,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:22:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 18:22:10,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:22:10,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-12-07 18:22:10,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664043033] [2019-12-07 18:22:10,842 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:22:10,842 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:22:10,842 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:22:10,842 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:22:10,842 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 18:22:10,842 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,842 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:22:10,842 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:22:10,842 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-12-07 18:22:10,842 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:22:10,843 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:22:10,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:10,878 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:22:10,878 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,880 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:10,880 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:10,887 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 18:22:10,887 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:12,606 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 18:22:12,608 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:22:12,608 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:22:12,608 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:22:12,608 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:22:12,608 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 18:22:12,608 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:12,608 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:22:12,608 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:22:12,608 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-12-07 18:22:12,608 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:22:12,608 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:22:12,609 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:12,611 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:12,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:12,639 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:22:12,640 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:12,642 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:12,643 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:12,644 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:12,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:12,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:12,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:12,645 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:12,645 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:12,648 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:12,652 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:22:12,654 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:22:12,654 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:22:12,654 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:22:12,654 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:22:12,654 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:22:12,655 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:22:12,655 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:22:12,657 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 18:22:12,660 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 18:22:12,660 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:12,662 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 18:22:12,663 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 18:22:12,663 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 18:22:12,663 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2019-12-07 18:22:12,665 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 18:22:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:12,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:22:12,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:22:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:12,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 18:22:12,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:22:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:22:12,817 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-12-07 18:22:12,817 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2019-12-07 18:22:25,182 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 82 states and 120 transitions. Complement of second has 31 states. [2019-12-07 18:22:25,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2019-12-07 18:22:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 18:22:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2019-12-07 18:22:25,184 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2019-12-07 18:22:25,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:22:25,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2019-12-07 18:22:25,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:22:25,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2019-12-07 18:22:25,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:22:25,186 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2019-12-07 18:22:25,190 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-12-07 18:22:25,193 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2019-12-07 18:22:25,193 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2019-12-07 18:22:25,193 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2019-12-07 18:22:25,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2019-12-07 18:22:25,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 18:22:25,194 INFO L688 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2019-12-07 18:22:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2019-12-07 18:22:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-12-07 18:22:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 18:22:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2019-12-07 18:22:25,200 INFO L711 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2019-12-07 18:22:25,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:22:25,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:22:25,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:22:25,203 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 10 states. [2019-12-07 18:22:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:22:25,254 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-12-07 18:22:25,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:22:25,254 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2019-12-07 18:22:25,255 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-12-07 18:22:25,256 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2019-12-07 18:22:25,256 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-12-07 18:22:25,256 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2019-12-07 18:22:25,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2019-12-07 18:22:25,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 18:22:25,257 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 18:22:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2019-12-07 18:22:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-12-07 18:22:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 18:22:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-12-07 18:22:25,259 INFO L711 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-12-07 18:22:25,259 INFO L591 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-12-07 18:22:25,259 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 18:22:25,259 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2019-12-07 18:22:25,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-12-07 18:22:25,260 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:22:25,260 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:22:25,260 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:22:25,260 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:22:25,260 INFO L794 eck$LassoCheckResult]: Stem: 502#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 503#L20 assume !(main_~x~0 < 0); 495#L21 call main_#t~ret3 := g(main_~x~0);< 496#gENTRY ~x := #in~x; 500#L12 assume !(0 == ~x); 501#L15 call #t~ret0 := g(~x - 1);< 507#gENTRY ~x := #in~x; 508#L12 assume 0 == ~x;#res := 1; 509#gFINAL assume true; 510#gEXIT >#22#return; 505#L15-1 call #t~ret1 := g(1 + #t~ret0);< 504#gENTRY ~x := #in~x; 506#L12 assume !(0 == ~x); 514#L15 call #t~ret0 := g(~x - 1);< 518#gENTRY ~x := #in~x; 517#L12 assume !(0 == ~x); 513#L15 [2019-12-07 18:22:25,260 INFO L796 eck$LassoCheckResult]: Loop: 513#L15 call #t~ret0 := g(~x - 1);< 511#gENTRY ~x := #in~x; 515#L12 assume !(0 == ~x); 513#L15 [2019-12-07 18:22:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:25,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2019-12-07 18:22:25,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:25,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736859079] [2019-12-07 18:22:25,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:25,271 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:25,271 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2019-12-07 18:22:25,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:25,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439884811] [2019-12-07 18:22:25,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:25,275 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2019-12-07 18:22:25,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:25,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474971659] [2019-12-07 18:22:25,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:22:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:22:25,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474971659] [2019-12-07 18:22:25,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544713145] [2019-12-07 18:22:25,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:22:25,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 18:22:25,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:22:25,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 18:22:25,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:22:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:22:25,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:22:25,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-12-07 18:22:25,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945998825] [2019-12-07 18:22:25,406 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:22:25,406 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:22:25,406 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:22:25,406 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:22:25,406 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 18:22:25,406 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:25,406 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:22:25,406 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:22:25,406 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2019-12-07 18:22:25,406 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:22:25,406 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:22:25,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:25,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:25,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:25,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:22:25,442 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:22:25,443 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:25,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:25,445 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:25,455 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 18:22:25,455 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:25,979 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:25,980 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-7, g_~x=-6} Honda state: {g_#in~x=-7, g_~x=-6} Generalized eigenvectors: [{g_#in~x=1, g_~x=0}, {g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}] Lambdas: [0, 1, 3] Nus: [0, 1] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:25,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:25,985 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:25,987 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:25,987 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:25,992 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:25,992 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:25,994 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:25,994 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:22:25,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:22:25,999 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:22:26,002 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:22:26,002 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-12-07 18:22:26,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:22:26,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:22:26,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:22:26,004 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2019-12-07 18:22:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:22:26,116 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 18:22:26,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:22:26,116 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2019-12-07 18:22:26,117 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-12-07 18:22:26,117 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2019-12-07 18:22:26,117 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2019-12-07 18:22:26,118 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-12-07 18:22:26,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2019-12-07 18:22:26,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 18:22:26,118 INFO L688 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-12-07 18:22:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2019-12-07 18:22:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-12-07 18:22:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 18:22:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-12-07 18:22:26,120 INFO L711 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-12-07 18:22:26,120 INFO L591 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-12-07 18:22:26,120 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 18:22:26,120 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2019-12-07 18:22:26,120 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-12-07 18:22:26,120 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:22:26,120 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:22:26,121 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:22:26,121 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2019-12-07 18:22:26,121 INFO L794 eck$LassoCheckResult]: Stem: 639#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 640#L20 assume !(main_~x~0 < 0); 632#L21 call main_#t~ret3 := g(main_~x~0);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 638#L15 call #t~ret0 := g(~x - 1);< 642#gENTRY ~x := #in~x; 643#L12 assume 0 == ~x;#res := 1; 650#gFINAL assume true; 648#gEXIT >#22#return; 635#L15-1 [2019-12-07 18:22:26,121 INFO L796 eck$LassoCheckResult]: Loop: 635#L15-1 call #t~ret1 := g(1 + #t~ret0);< 641#gENTRY ~x := #in~x; 634#L12 assume !(0 == ~x); 636#L15 call #t~ret0 := g(~x - 1);< 647#gENTRY ~x := #in~x; 651#L12 assume !(0 == ~x); 645#L15 call #t~ret0 := g(~x - 1);< 649#gENTRY ~x := #in~x; 652#L12 assume 0 == ~x;#res := 1; 644#gFINAL assume true; 646#gEXIT >#22#return; 635#L15-1 [2019-12-07 18:22:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2019-12-07 18:22:26,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:26,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58633732] [2019-12-07 18:22:26,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:26,127 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2019-12-07 18:22:26,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:26,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799144133] [2019-12-07 18:22:26,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:26,134 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:22:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2019-12-07 18:22:26,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:22:26,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045107498] [2019-12-07 18:22:26,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:22:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:22:26,144 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:22:26,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 06:22:26 BoogieIcfgContainer [2019-12-07 18:22:26,294 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 18:22:26,294 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:22:26,294 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:22:26,295 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:22:26,295 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:22:09" (3/4) ... [2019-12-07 18:22:26,297 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-12-07 18:22:26,336 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_085b02fe-dd6b-458d-9d53-f32f91431b8e/bin/uautomizer/witness.graphml [2019-12-07 18:22:26,336 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:22:26,337 INFO L168 Benchmark]: Toolchain (without parser) took 16949.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -208.4 MB). Peak memory consumption was 218.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:22:26,338 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:22:26,338 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -174.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:22:26,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:22:26,338 INFO L168 Benchmark]: Boogie Preprocessor took 9.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:22:26,339 INFO L168 Benchmark]: RCFGBuilder took 126.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:22:26,339 INFO L168 Benchmark]: BuchiAutomizer took 16580.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 848.5 MB in the end (delta: 250.7 MB). Peak memory consumption was 250.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:22:26,339 INFO L168 Benchmark]: Witness Printer took 41.37 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 848.5 MB in the beginning and 1.2 GB in the end (delta: -304.6 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. [2019-12-07 18:22:26,341 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -174.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 126.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 16580.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 848.5 MB in the end (delta: 250.7 MB). Peak memory consumption was 250.7 MB. Max. memory is 11.5 GB. * Witness Printer took 41.37 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 848.5 MB in the beginning and 1.2 GB in the end (delta: -304.6 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 16.5s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 3.5s. Construction of modules took 12.2s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 46 SDtfs, 70 SDslu, 99 SDs, 0 SdLazy, 234 SolverSat, 48 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 12.2s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 53ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.3s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@705d504f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5168cd43=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@77e9fec3=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@16938622=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L21] CALL g(x) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...