./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 0.1.24-678e011 [2019-11-20 11:29:33,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:29:33,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:29:33,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:29:33,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:29:33,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:29:33,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:29:33,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:29:33,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:29:33,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:29:33,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:29:33,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:29:33,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:29:33,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:29:33,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:29:33,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:29:33,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:29:33,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:29:33,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:29:33,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:29:33,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:29:33,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:29:33,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:29:33,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:29:33,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:29:33,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:29:33,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:29:33,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:29:33,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:29:33,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:29:33,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:29:33,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:29:33,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:29:33,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:29:33,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:29:33,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:29:33,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:29:33,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:29:33,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:29:33,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:29:33,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:29:33,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 11:29:33,168 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:29:33,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:29:33,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:29:33,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:29:33,180 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:29:33,180 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 11:29:33,181 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 11:29:33,181 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 11:29:33,181 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 11:29:33,181 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 11:29:33,181 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 11:29:33,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:29:33,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 11:29:33,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:29:33,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:29:33,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 11:29:33,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 11:29:33,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 11:29:33,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:29:33,183 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 11:29:33,184 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:29:33,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 11:29:33,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:29:33,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:29:33,185 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 11:29:33,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:29:33,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 11:29:33,186 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 11:29:33,187 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 11:29:33,188 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:33,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:29:33,371 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:29:33,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:29:33,375 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:29:33,376 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:29:33,377 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-11-20 11:29:33,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/data/ae43bb82f/a8d7abf6dff94a7598ae26d737949b9f/FLAG715956b83 [2019-11-20 11:29:33,815 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:29:33,816 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-11-20 11:29:33,821 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/data/ae43bb82f/a8d7abf6dff94a7598ae26d737949b9f/FLAG715956b83 [2019-11-20 11:29:34,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/data/ae43bb82f/a8d7abf6dff94a7598ae26d737949b9f [2019-11-20 11:29:34,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:29:34,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:29:34,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:29:34,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:29:34,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:29:34,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b77f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34, skipping insertion in model container [2019-11-20 11:29:34,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,271 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:29:34,283 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:29:34,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:29:34,425 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:29:34,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:29:34,563 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:29:34,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34 WrapperNode [2019-11-20 11:29:34,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:29:34,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:29:34,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:29:34,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:29:34,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:29:34,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:29:34,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:29:34,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:29:34,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... [2019-11-20 11:29:34,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:29:34,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:29:34,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:29:34,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:29:34,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:34,669 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-20 11:29:34,670 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-20 11:29:34,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:29:34,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:29:34,813 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:29:34,814 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 11:29:34,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:29:34 BoogieIcfgContainer [2019-11-20 11:29:34,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:29:34,815 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 11:29:34,817 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 11:29:34,819 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 11:29:34,820 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 11:29:34,820 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 11:29:34" (1/3) ... [2019-11-20 11:29:34,821 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5096325e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 11:29:34, skipping insertion in model container [2019-11-20 11:29:34,821 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 11:29:34,821 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:29:34" (2/3) ... [2019-11-20 11:29:34,822 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5096325e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 11:29:34, skipping insertion in model container [2019-11-20 11:29:34,822 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 11:29:34,822 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:29:34" (3/3) ... [2019-11-20 11:29:34,823 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2019-11-20 11:29:34,866 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 11:29:34,867 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 11:29:34,867 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 11:29:34,867 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:29:34,867 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:29:34,867 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 11:29:34,867 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:29:34,867 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 11:29:34,880 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-11-20 11:29:34,903 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 11:29:34,903 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:29:34,904 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:29:34,911 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 11:29:34,911 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 11:29:34,911 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 11:29:34,911 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-11-20 11:29:34,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 11:29:34,913 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:29:34,913 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:29:34,913 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 11:29:34,914 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 11:29:34,921 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2019-11-20 11:29:34,921 INFO L796 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2019-11-20 11:29:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:34,927 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2019-11-20 11:29:34,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:34,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500329249] [2019-11-20 11:29:34,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:35,028 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2019-11-20 11:29:35,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:35,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733581558] [2019-11-20 11:29:35,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:35,042 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:35,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2019-11-20 11:29:35,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:35,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682564463] [2019-11-20 11:29:35,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:35,062 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:35,210 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:29:35,211 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:29:35,211 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:29:35,211 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:29:35,211 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:29:35,212 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:35,212 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:29:35,212 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:29:35,212 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2019-11-20 11:29:35,212 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:29:35,213 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:29:35,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,239 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,342 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:29:35,343 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,351 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,351 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,359 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,359 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,369 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,369 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,372 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,372 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,380 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,380 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,385 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,385 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,389 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,389 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,394 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,407 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:29:35,408 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,429 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,429 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] [2019-11-20 11:29:35,493 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:29:35,494 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:29:35,494 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:29:35,494 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:29:35,494 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:29:35,494 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:35,494 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:29:35,494 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:29:35,494 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-11-20 11:29:35,495 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:29:35,495 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:29:35,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,690 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:29:35,690 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:35,705 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,705 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:35,711 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,711 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_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:35,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,729 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:35,734 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,734 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,750 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,756 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,756 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,773 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,773 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,776 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,776 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,781 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,784 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,784 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,790 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,794 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:35,794 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,801 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:35,801 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:35,808 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:29:35,808 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:35,824 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:29:35,826 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:29:35,826 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:29:35,826 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:29:35,826 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:29:35,826 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:29:35,826 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:35,827 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:29:35,827 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:29:35,827 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-11-20 11:29:35,827 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:29:35,827 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:29:35,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,855 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,866 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:35,943 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:29:35,947 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:35,964 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 [2019-11-20 11:29:35,966 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:35,966 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:35,967 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:35,967 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:35,967 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:35,969 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:35,970 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:35,972 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:35,987 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 [2019-11-20 11:29:35,989 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:35,989 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:35,989 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:35,989 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:35,989 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:35,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:35,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:35,996 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:36,016 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 [2019-11-20 11:29:36,018 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,019 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:36,019 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,019 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:36,019 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,024 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:36,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:36,027 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:36,036 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 Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:36,038 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,038 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:36,038 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,038 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:36,039 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,044 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:36,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:29:36,046 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:36,066 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 [2019-11-20 11:29:36,068 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,068 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:36,068 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,069 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:36,069 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,070 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:36,070 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:29:36,071 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:36,088 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 [2019-11-20 11:29:36,089 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,090 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:36,090 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,090 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:36,090 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,091 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:36,091 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:36,093 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:36,103 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 [2019-11-20 11:29:36,105 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,105 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:36,106 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,106 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:36,106 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,107 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:36,107 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:29:36,111 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:36,116 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 [2019-11-20 11:29:36,117 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,117 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:36,117 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,117 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:36,118 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,118 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:36,118 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:29:36,123 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:36,130 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 [2019-11-20 11:29:36,132 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,132 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:36,132 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,132 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:36,132 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,133 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:36,133 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:29:36,135 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:36,145 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 [2019-11-20 11:29:36,148 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:36,148 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:36,148 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 11:29:36,149 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:36,170 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-20 11:29:36,171 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:36,192 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:29:36,224 INFO L443 ModelExtractionUtils]: Simplification made 11 calls to the SMT solver. [2019-11-20 11:29:36,224 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:36,229 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:29:36,233 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-11-20 11:29:36,233 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:29:36,234 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2019-11-20 11:29:36,244 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-20 11:29:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:36,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:29:36,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:29:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:36,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 11:29:36,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:29:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:29:36,404 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 [2019-11-20 11:29:36,406 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2019-11-20 11:29:36,538 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. [2019-11-20 11:29:36,539 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 [2019-11-20 11:29:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 11:29:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2019-11-20 11:29:36,543 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-20 11:29:36,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:29:36,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-20 11:29:36,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:29:36,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-20 11:29:36,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:29:36,545 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2019-11-20 11:29:36,549 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 11:29:36,555 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2019-11-20 11:29:36,557 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-11-20 11:29:36,557 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2019-11-20 11:29:36,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2019-11-20 11:29:36,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:29:36,560 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-20 11:29:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2019-11-20 11:29:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-20 11:29:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 11:29:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-20 11:29:36,589 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-20 11:29:36,589 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-20 11:29:36,589 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 11:29:36,589 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2019-11-20 11:29:36,590 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 11:29:36,590 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:29:36,591 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:29:36,592 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:29:36,592 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-20 11:29:36,592 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2019-11-20 11:29:36,592 INFO L796 eck$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 [2019-11-20 11:29:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2019-11-20 11:29:36,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:36,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061324189] [2019-11-20 11:29:36,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:36,607 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:36,608 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2019-11-20 11:29:36,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:36,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42989452] [2019-11-20 11:29:36,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:36,620 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2019-11-20 11:29:36,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:36,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743950330] [2019-11-20 11:29:36,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 11:29:36,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743950330] [2019-11-20 11:29:36,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107066895] [2019-11-20 11:29:36,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:36,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:29:36,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:29:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 11:29:36,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:29:36,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-20 11:29:36,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062112846] [2019-11-20 11:29:36,945 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:29:36,945 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:29:36,945 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:29:36,945 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:29:36,946 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:29:36,946 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:36,946 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:29:36,946 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:29:36,946 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-11-20 11:29:36,946 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:29:36,946 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:29:36,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:36,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:36,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:37,027 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:29:37,027 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:37,037 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:37,037 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:37,053 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:29:37,053 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:38,970 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:29:38,971 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:29:38,971 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:29:38,971 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:29:38,971 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:29:38,972 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:29:38,972 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:38,972 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:29:38,972 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:29:38,972 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-11-20 11:29:38,972 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:29:38,972 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:29:38,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:38,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:38,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:39,036 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:29:39,036 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:39,049 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 [2019-11-20 11:29:39,052 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:39,052 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:39,052 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:39,052 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:39,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:39,053 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:39,053 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:39,055 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:39,064 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 [2019-11-20 11:29:39,065 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:29:39,065 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:29:39,066 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:29:39,066 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:29:39,066 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:29:39,069 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:29:39,069 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:29:39,072 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:29:39,084 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 11:29:39,084 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_4119d457-108f-4403-995c-eadd3fef32f2/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) [2019-11-20 11:29:39,088 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:29:39,089 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 11:29:39,089 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:29:39,089 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2019-11-20 11:29:39,096 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:39,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:29:39,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:29:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:39,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 11:29:39,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:29:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:29:39,361 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 [2019-11-20 11:29:39,361 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2019-11-20 11:29:52,000 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. [2019-11-20 11:29:52,000 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 [2019-11-20 11:29:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 11:29:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2019-11-20 11:29:52,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2019-11-20 11:29:52,004 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:29:52,004 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2019-11-20 11:29:52,004 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:29:52,004 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2019-11-20 11:29:52,005 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:29:52,005 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2019-11-20 11:29:52,010 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-20 11:29:52,015 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2019-11-20 11:29:52,015 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2019-11-20 11:29:52,016 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2019-11-20 11:29:52,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2019-11-20 11:29:52,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:29:52,017 INFO L688 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2019-11-20 11:29:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2019-11-20 11:29:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-11-20 11:29:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 11:29:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2019-11-20 11:29:52,027 INFO L711 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2019-11-20 11:29:52,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:29:52,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:29:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:29:52,032 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 10 states. [2019-11-20 11:29:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:29:52,131 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-20 11:29:52,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 11:29:52,131 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2019-11-20 11:29:52,133 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-20 11:29:52,135 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2019-11-20 11:29:52,135 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-11-20 11:29:52,135 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2019-11-20 11:29:52,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2019-11-20 11:29:52,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:29:52,136 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-20 11:29:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2019-11-20 11:29:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-11-20 11:29:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 11:29:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-20 11:29:52,139 INFO L711 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-20 11:29:52,139 INFO L591 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-20 11:29:52,139 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 11:29:52,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2019-11-20 11:29:52,140 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-20 11:29:52,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:29:52,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:29:52,141 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:29:52,141 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 11:29:52,142 INFO L794 eck$LassoCheckResult]: Stem: 502#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 503#L20 assume !(main_~x~0 < 0); 495#L21 call main_#t~ret3 := g(main_~x~0);< 496#gENTRY ~x := #in~x; 500#L12 assume !(0 == ~x); 501#L15 call #t~ret0 := g(~x - 1);< 507#gENTRY ~x := #in~x; 508#L12 assume 0 == ~x;#res := 1; 509#gFINAL assume true; 510#gEXIT >#22#return; 505#L15-1 call #t~ret1 := g(1 + #t~ret0);< 504#gENTRY ~x := #in~x; 506#L12 assume !(0 == ~x); 514#L15 call #t~ret0 := g(~x - 1);< 518#gENTRY ~x := #in~x; 517#L12 assume !(0 == ~x); 513#L15 [2019-11-20 11:29:52,142 INFO L796 eck$LassoCheckResult]: Loop: 513#L15 call #t~ret0 := g(~x - 1);< 511#gENTRY ~x := #in~x; 515#L12 assume !(0 == ~x); 513#L15 [2019-11-20 11:29:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2019-11-20 11:29:52,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:52,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768190825] [2019-11-20 11:29:52,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:52,160 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:52,161 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2019-11-20 11:29:52,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:52,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10253944] [2019-11-20 11:29:52,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:52,167 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:52,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2019-11-20 11:29:52,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:52,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995756369] [2019-11-20 11:29:52,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:29:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:29:52,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995756369] [2019-11-20 11:29:52,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308273505] [2019-11-20 11:29:52,298 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:52,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-20 11:29:52,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:29:52,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 11:29:52,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:29:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:29:52,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:29:52,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-20 11:29:52,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340476264] [2019-11-20 11:29:52,417 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:29:52,417 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:29:52,417 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:29:52,417 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:29:52,417 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:29:52,417 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:29:52,417 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:29:52,417 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:29:52,417 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2019-11-20 11:29:52,417 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:29:52,418 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:29:52,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:52,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:52,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:52,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:29:52,485 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:29:52,485 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:52,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:52,492 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:52,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:29:52,503 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:53,087 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:53,087 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:53,092 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:53,092 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:53,095 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:53,095 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:53,100 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:53,100 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:53,103 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:53,103 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_4119d457-108f-4403-995c-eadd3fef32f2/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 [2019-11-20 11:29:53,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:29:53,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:29:53,111 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:29:53,111 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-11-20 11:29:53,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:29:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:29:53,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:29:53,113 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2019-11-20 11:29:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:29:53,280 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-20 11:29:53,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 11:29:53,281 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2019-11-20 11:29:53,282 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-20 11:29:53,282 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2019-11-20 11:29:53,282 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2019-11-20 11:29:53,283 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-11-20 11:29:53,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2019-11-20 11:29:53,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:29:53,283 INFO L688 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-20 11:29:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2019-11-20 11:29:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-11-20 11:29:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 11:29:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-20 11:29:53,285 INFO L711 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-20 11:29:53,285 INFO L591 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-20 11:29:53,285 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 11:29:53,285 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2019-11-20 11:29:53,286 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-20 11:29:53,286 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:29:53,286 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:29:53,287 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:29:53,287 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2019-11-20 11:29:53,287 INFO L794 eck$LassoCheckResult]: Stem: 639#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 640#L20 assume !(main_~x~0 < 0); 632#L21 call main_#t~ret3 := g(main_~x~0);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 638#L15 call #t~ret0 := g(~x - 1);< 642#gENTRY ~x := #in~x; 643#L12 assume 0 == ~x;#res := 1; 650#gFINAL assume true; 648#gEXIT >#22#return; 635#L15-1 [2019-11-20 11:29:53,287 INFO L796 eck$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 [2019-11-20 11:29:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2019-11-20 11:29:53,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:53,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691461278] [2019-11-20 11:29:53,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:53,298 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2019-11-20 11:29:53,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:53,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127664958] [2019-11-20 11:29:53,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:53,310 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:29:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2019-11-20 11:29:53,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:29:53,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812924470] [2019-11-20 11:29:53,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:29:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:29:53,330 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:29:53,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 11:29:53 BoogieIcfgContainer [2019-11-20 11:29:53,567 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 11:29:53,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 11:29:53,567 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 11:29:53,568 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 11:29:53,568 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:29:34" (3/4) ... [2019-11-20 11:29:53,571 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-20 11:29:53,609 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4119d457-108f-4403-995c-eadd3fef32f2/bin/uautomizer/witness.graphml [2019-11-20 11:29:53,609 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 11:29:53,612 INFO L168 Benchmark]: Toolchain (without parser) took 19357.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 951.4 MB in the beginning and 913.0 MB in the end (delta: 38.4 MB). Peak memory consumption was 225.6 MB. Max. memory is 11.5 GB. [2019-11-20 11:29:53,612 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:29:53,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -233.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-20 11:29:53,613 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:29:53,614 INFO L168 Benchmark]: Boogie Preprocessor took 12.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:29:53,614 INFO L168 Benchmark]: RCFGBuilder took 203.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-20 11:29:53,615 INFO L168 Benchmark]: BuchiAutomizer took 18751.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 915.9 MB in the end (delta: 249.1 MB). Peak memory consumption was 249.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:29:53,615 INFO L168 Benchmark]: Witness Printer took 42.26 ms. Allocated memory is still 1.2 GB. Free memory was 915.9 MB in the beginning and 913.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. [2019-11-20 11:29:53,618 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 310.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -233.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 203.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 18751.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 915.9 MB in the end (delta: 249.1 MB). Peak memory consumption was 249.1 MB. Max. memory is 11.5 GB. * Witness Printer took 42.26 ms. Allocated memory is still 1.2 GB. Free memory was 915.9 MB in the beginning and 913.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. 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 18.7s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 5.0s. Construction of modules took 12.4s. Büchi inclusion checks took 1.0s. 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, 12.4s 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: 96ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.7s - 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@34853ccb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@230f6215=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@637712f0=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@238f8454=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Exception during sending of exit command (exit): Broken pipe 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...