./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter3_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter3_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 639f18bc5de28da6eb107c1e55f1eb45909efdef ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 13:24:39,777 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 13:24:39,778 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 13:24:39,785 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 13:24:39,785 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 13:24:39,785 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 13:24:39,786 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 13:24:39,787 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 13:24:39,788 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 13:24:39,789 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 13:24:39,790 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 13:24:39,790 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 13:24:39,791 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 13:24:39,791 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 13:24:39,792 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 13:24:39,792 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 13:24:39,793 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 13:24:39,794 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 13:24:39,795 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 13:24:39,796 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 13:24:39,797 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 13:24:39,798 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 13:24:39,799 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 13:24:39,799 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 13:24:39,799 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 13:24:39,800 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 13:24:39,800 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 13:24:39,801 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 13:24:39,801 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 13:24:39,802 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 13:24:39,802 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 13:24:39,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 13:24:39,803 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 13:24:39,803 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 13:24:39,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 13:24:39,804 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 13:24:39,804 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-23 13:24:39,813 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 13:24:39,814 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 13:24:39,814 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 13:24:39,815 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 13:24:39,815 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 13:24:39,815 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 13:24:39,815 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 13:24:39,815 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 13:24:39,815 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 13:24:39,815 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 13:24:39,816 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 13:24:39,816 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 13:24:39,816 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 13:24:39,816 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 13:24:39,816 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 13:24:39,816 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 13:24:39,816 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 13:24:39,816 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 13:24:39,817 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 13:24:39,817 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 13:24:39,818 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 13:24:39,819 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 13:24:39,819 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 13:24:39,819 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 13:24:39,819 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 13:24:39,819 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 13:24:39,819 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 13:24:39,819 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 13:24:39,820 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 13:24:39,820 INFO L133 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/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 -> 639f18bc5de28da6eb107c1e55f1eb45909efdef [2018-11-23 13:24:39,840 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 13:24:39,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 13:24:39,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 13:24:39,851 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 13:24:39,852 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 13:24:39,852 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/../../sv-benchmarks/c/termination-numeric/rec_counter3_true-termination_true-no-overflow.c [2018-11-23 13:24:39,889 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/data/6eaa87c26/f96a63fafb024c7a88ad57d074c20e90/FLAGd6aaf63e9 [2018-11-23 13:24:40,285 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 13:24:40,285 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/sv-benchmarks/c/termination-numeric/rec_counter3_true-termination_true-no-overflow.c [2018-11-23 13:24:40,289 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/data/6eaa87c26/f96a63fafb024c7a88ad57d074c20e90/FLAGd6aaf63e9 [2018-11-23 13:24:40,297 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/data/6eaa87c26/f96a63fafb024c7a88ad57d074c20e90 [2018-11-23 13:24:40,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 13:24:40,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 13:24:40,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 13:24:40,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 13:24:40,302 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 13:24:40,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ec9420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40, skipping insertion in model container [2018-11-23 13:24:40,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 13:24:40,324 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 13:24:40,431 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 13:24:40,433 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 13:24:40,442 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 13:24:40,450 INFO L195 MainTranslator]: Completed translation [2018-11-23 13:24:40,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40 WrapperNode [2018-11-23 13:24:40,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 13:24:40,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 13:24:40,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 13:24:40,451 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 13:24:40,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 13:24:40,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 13:24:40,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 13:24:40,478 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 13:24:40,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... [2018-11-23 13:24:40,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 13:24:40,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 13:24:40,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 13:24:40,491 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 13:24:40,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:40,564 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2018-11-23 13:24:40,564 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2018-11-23 13:24:40,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 13:24:40,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 13:24:40,680 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 13:24:40,680 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-23 13:24:40,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:24:40 BoogieIcfgContainer [2018-11-23 13:24:40,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 13:24:40,681 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 13:24:40,681 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 13:24:40,684 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 13:24:40,685 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 13:24:40,685 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 01:24:40" (1/3) ... [2018-11-23 13:24:40,686 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@69c24d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 01:24:40, skipping insertion in model container [2018-11-23 13:24:40,686 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 13:24:40,686 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:24:40" (2/3) ... [2018-11-23 13:24:40,686 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@69c24d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 01:24:40, skipping insertion in model container [2018-11-23 13:24:40,686 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 13:24:40,687 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:24:40" (3/3) ... [2018-11-23 13:24:40,688 INFO L375 chiAutomizerObserver]: Analyzing ICFG rec_counter3_true-termination_true-no-overflow.c [2018-11-23 13:24:40,745 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 13:24:40,745 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 13:24:40,745 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 13:24:40,746 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 13:24:40,746 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 13:24:40,746 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 13:24:40,746 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 13:24:40,746 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 13:24:40,746 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 13:24:40,761 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2018-11-23 13:24:40,785 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 5 [2018-11-23 13:24:40,785 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:40,785 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:40,791 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-23 13:24:40,792 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 13:24:40,792 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 13:24:40,792 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2018-11-23 13:24:40,794 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 5 [2018-11-23 13:24:40,794 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:40,794 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:40,794 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-23 13:24:40,794 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 13:24:40,800 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 5#L18true assume !(main_~i~0 <= 0); 9#L20true call main_#t~ret3 := rec(main_~i~0);< 3#recENTRYtrue [2018-11-23 13:24:40,801 INFO L796 eck$LassoCheckResult]: Loop: 3#recENTRYtrue ~a := #in~a; 8#L5true assume !(0 == ~a); 11#L8true call #t~ret0 := rec(~a - 1);< 3#recENTRYtrue [2018-11-23 13:24:40,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:40,806 INFO L82 PathProgramCache]: Analyzing trace with hash 51816, now seen corresponding path program 1 times [2018-11-23 13:24:40,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:40,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:40,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:40,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:40,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:40,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:40,878 INFO L82 PathProgramCache]: Analyzing trace with hash 29959, now seen corresponding path program 1 times [2018-11-23 13:24:40,878 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:40,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:40,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:40,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:40,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:40,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:40,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1543650624, now seen corresponding path program 1 times [2018-11-23 13:24:40,888 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:40,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:40,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:40,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:40,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:40,968 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:40,969 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:40,969 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:40,969 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:40,969 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:24:40,969 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:40,969 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:40,970 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:40,970 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3_true-termination_true-no-overflow.c_Iteration1_Loop [2018-11-23 13:24:40,970 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:40,970 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:40,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,002 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,016 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,103 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:41,104 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,107 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,108 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,117 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,117 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~ret0=0} Honda state: {rec_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,132 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,133 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,138 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,138 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~res~0=0} Honda state: {rec_~res~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,153 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,153 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,155 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,155 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~post1=0} Honda state: {rec_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,169 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,170 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,172 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,172 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#res=0} Honda state: {rec_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,186 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,186 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,188 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,188 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~a=0} Honda state: {rec_~a=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,210 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,210 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,227 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:24:41,227 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,238 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,238 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#in~a=-5} Honda state: {rec_#in~a=-5} Generalized eigenvectors: [{rec_#in~a=0}, {rec_#in~a=-1}, {rec_#in~a=0}] Lambdas: [0, 1, 3] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,253 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,253 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,255 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,255 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~rescopy~0=0} Honda state: {rec_~rescopy~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-23 13:24:41,289 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:41,290 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:41,290 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:41,290 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:41,290 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:24:41,290 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,290 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:41,290 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:41,290 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3_true-termination_true-no-overflow.c_Iteration1_Lasso [2018-11-23 13:24:41,291 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:41,291 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:41,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,433 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:41,433 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,442 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,442 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,446 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,446 INFO L448 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/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,478 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,478 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,481 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,481 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~ret0=0} Honda state: {rec_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,499 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,499 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,502 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,503 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~post1=0} Honda state: {rec_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,532 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,532 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,538 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,538 INFO L448 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/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,565 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,565 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,568 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,568 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret3=0} Honda state: {ULTIMATE.start_main_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,587 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,587 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,590 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,590 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#res=0} Honda state: {rec_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,610 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,610 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,613 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,613 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~a=0} Honda state: {rec_~a=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,632 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,632 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,635 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,635 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~i~0=0} Honda state: {ULTIMATE.start_main_~i~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,654 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,654 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,657 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,657 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~rescopy~0=0} Honda state: {rec_~rescopy~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,675 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,675 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,677 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,677 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~res~0=0} Honda state: {rec_~res~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,697 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,697 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,699 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:41,699 INFO L448 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/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,718 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:41,718 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:41,739 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:24:41,739 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:41,765 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:24:41,766 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:41,767 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:41,767 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:41,767 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:41,767 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:24:41,767 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:41,767 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:41,767 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:41,767 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3_true-termination_true-no-overflow.c_Iteration1_Lasso [2018-11-23 13:24:41,767 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:41,767 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:41,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,775 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:41,850 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:41,854 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:24:41,855 INFO L122 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 [2018-11-23 13:24:41,856 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,856 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,856 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,857 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,857 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,858 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,858 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,860 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,861 INFO L122 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 [2018-11-23 13:24:41,861 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,861 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,861 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,861 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,861 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,862 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,862 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,863 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,864 INFO L122 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 [2018-11-23 13:24:41,864 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,864 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,864 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,865 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,865 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,865 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,865 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,866 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,867 INFO L122 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 [2018-11-23 13:24:41,867 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,867 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,867 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,867 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,867 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,868 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,868 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,869 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,869 INFO L122 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 [2018-11-23 13:24:41,870 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,870 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,870 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,870 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,870 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,870 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,871 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,871 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,871 INFO L122 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 [2018-11-23 13:24:41,872 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,872 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,872 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,872 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,872 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,872 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,873 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,873 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,874 INFO L122 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 [2018-11-23 13:24:41,874 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,874 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,875 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,875 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,875 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,875 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,875 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,877 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,877 INFO L122 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 [2018-11-23 13:24:41,877 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,878 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,878 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,878 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,878 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,878 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,879 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,879 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,880 INFO L122 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 [2018-11-23 13:24:41,880 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,880 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,880 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,881 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,881 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,881 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,881 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,882 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,883 INFO L122 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 [2018-11-23 13:24:41,883 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,883 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,884 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,884 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,884 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,884 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,884 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,885 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,886 INFO L122 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 [2018-11-23 13:24:41,886 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,886 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:41,886 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,886 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:41,887 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,887 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:41,887 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:41,888 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:41,889 INFO L122 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 [2018-11-23 13:24:41,889 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:41,889 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:41,889 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-23 13:24:41,890 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:41,895 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-23 13:24:41,896 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-23 13:24:41,958 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:24:41,978 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2018-11-23 13:24:41,978 INFO L444 ModelExtractionUtils]: 6 out of 11 variables were initially zero. Simplification set additionally 2 variables to zero. [2018-11-23 13:24:41,980 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:24:41,983 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-23 13:24:41,984 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:24:41,984 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec_#in~a) = 1*rec_#in~a Supporting invariants [1*rec_#in~a >= 0] [2018-11-23 13:24:41,998 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-23 13:24:42,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:42,130 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 [2018-11-23 13:24:42,131 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states. Second operand 5 states. [2018-11-23 13:24:42,247 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states.. Second operand 5 states. Result 34 states and 42 transitions. Complement of second has 13 states. [2018-11-23 13:24:42,248 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 [2018-11-23 13:24:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 13:24:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2018-11-23 13:24:42,251 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2018-11-23 13:24:42,252 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:42,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2018-11-23 13:24:42,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:42,253 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2018-11-23 13:24:42,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:42,255 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 42 transitions. [2018-11-23 13:24:42,257 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2018-11-23 13:24:42,263 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 22 states and 29 transitions. [2018-11-23 13:24:42,264 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2018-11-23 13:24:42,264 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-23 13:24:42,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 29 transitions. [2018-11-23 13:24:42,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:42,265 INFO L705 BuchiCegarLoop]: Abstraction has 22 states and 29 transitions. [2018-11-23 13:24:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 29 transitions. [2018-11-23 13:24:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-11-23 13:24:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-23 13:24:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2018-11-23 13:24:42,290 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2018-11-23 13:24:42,290 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2018-11-23 13:24:42,290 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 13:24:42,290 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 25 transitions. [2018-11-23 13:24:42,291 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2018-11-23 13:24:42,291 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:42,291 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:42,292 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:24:42,292 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1] [2018-11-23 13:24:42,293 INFO L794 eck$LassoCheckResult]: Stem: 128#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 122#L18 assume !(main_~i~0 <= 0); 116#L20 call main_#t~ret3 := rec(main_~i~0);< 115#recENTRY ~a := #in~a; 118#L5 assume 0 == ~a;#res := 0; 125#recFINAL assume true; 132#recEXIT >#47#return; 123#L20-1 main_~res~1 := main_#t~ret3;havoc main_#t~ret3; 124#L21-2 [2018-11-23 13:24:42,293 INFO L796 eck$LassoCheckResult]: Loop: 124#L21-2 assume !!(main_~res~1 < 1); 124#L21-2 [2018-11-23 13:24:42,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1684481175, now seen corresponding path program 1 times [2018-11-23 13:24:42,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:42,335 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 13:24:42,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 13:24:42,337 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 13:24:42,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash 69, now seen corresponding path program 1 times [2018-11-23 13:24:42,337 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 13:24:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 13:24:42,349 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-23 13:24:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:24:42,387 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2018-11-23 13:24:42,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 13:24:42,388 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 23 transitions. [2018-11-23 13:24:42,389 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2018-11-23 13:24:42,390 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 17 states and 20 transitions. [2018-11-23 13:24:42,390 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2018-11-23 13:24:42,390 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2018-11-23 13:24:42,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 20 transitions. [2018-11-23 13:24:42,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:42,391 INFO L705 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-11-23 13:24:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 20 transitions. [2018-11-23 13:24:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-23 13:24:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-23 13:24:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-11-23 13:24:42,393 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-11-23 13:24:42,393 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-11-23 13:24:42,393 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 13:24:42,393 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 20 transitions. [2018-11-23 13:24:42,394 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2018-11-23 13:24:42,394 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:42,394 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:42,394 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:24:42,394 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1] [2018-11-23 13:24:42,395 INFO L794 eck$LassoCheckResult]: Stem: 175#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 171#L18 assume !(main_~i~0 <= 0); 166#L20 call main_#t~ret3 := rec(main_~i~0);< 165#recENTRY ~a := #in~a; 167#L5 assume !(0 == ~a); 169#L8 call #t~ret0 := rec(~a - 1);< 168#recENTRY ~a := #in~a; 170#L5 assume 0 == ~a;#res := 0; 174#recFINAL assume true; 180#recEXIT >#45#return; 179#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 176#L10-2 [2018-11-23 13:24:42,395 INFO L796 eck$LassoCheckResult]: Loop: 176#L10-2 assume !!(~rescopy~0 > 0);#t~post1 := ~rescopy~0;~rescopy~0 := #t~post1 - 1;havoc #t~post1; 176#L10-2 [2018-11-23 13:24:42,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1511241834, now seen corresponding path program 1 times [2018-11-23 13:24:42,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 1 times [2018-11-23 13:24:42,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash -396143387, now seen corresponding path program 1 times [2018-11-23 13:24:42,404 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 13:24:42,431 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 13:24:42,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 13:24:42,446 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:42,446 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:42,446 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:42,446 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:42,446 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:24:42,446 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:42,446 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:42,446 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:42,446 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3_true-termination_true-no-overflow.c_Iteration3_Loop [2018-11-23 13:24:42,446 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:42,446 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:42,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,465 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:42,465 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:42,480 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:42,480 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:42,499 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:24:42,499 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:42,517 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:24:42,518 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:42,519 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:42,519 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:42,519 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:42,519 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:24:42,519 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:42,519 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:42,519 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:42,519 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3_true-termination_true-no-overflow.c_Iteration3_Loop [2018-11-23 13:24:42,519 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:42,519 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:42,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,530 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,550 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:42,550 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:24:42,551 INFO L122 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 [2018-11-23 13:24:42,551 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:42,551 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:42,552 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:42,552 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:42,552 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:42,552 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:42,553 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:42,553 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:42,553 INFO L122 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 [2018-11-23 13:24:42,554 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:42,554 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:42,554 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:42,554 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:42,555 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:42,555 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:42,555 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:42,557 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:24:42,559 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:24:42,559 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:24:42,559 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:24:42,559 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:24:42,560 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:24:42,560 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec_~rescopy~0) = 1*rec_~rescopy~0 Supporting invariants [] [2018-11-23 13:24:42,560 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:24:42,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:42,626 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2018-11-23 13:24:42,626 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 20 transitions. cyclomatic complexity: 6 Second operand 3 states. [2018-11-23 13:24:42,655 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 20 transitions. cyclomatic complexity: 6. Second operand 3 states. Result 37 states and 49 transitions. Complement of second has 10 states. [2018-11-23 13:24:42,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 13:24:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2018-11-23 13:24:42,657 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 11 letters. Loop has 1 letters. [2018-11-23 13:24:42,658 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:42,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 1 letters. [2018-11-23 13:24:42,658 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:42,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 11 letters. Loop has 2 letters. [2018-11-23 13:24:42,658 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:42,658 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 49 transitions. [2018-11-23 13:24:42,660 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2018-11-23 13:24:42,661 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 31 states and 41 transitions. [2018-11-23 13:24:42,661 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2018-11-23 13:24:42,661 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2018-11-23 13:24:42,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 41 transitions. [2018-11-23 13:24:42,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:42,662 INFO L705 BuchiCegarLoop]: Abstraction has 31 states and 41 transitions. [2018-11-23 13:24:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 41 transitions. [2018-11-23 13:24:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-23 13:24:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-23 13:24:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2018-11-23 13:24:42,665 INFO L728 BuchiCegarLoop]: Abstraction has 31 states and 41 transitions. [2018-11-23 13:24:42,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 13:24:42,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 13:24:42,665 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 5 states. [2018-11-23 13:24:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:24:42,673 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-11-23 13:24:42,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 13:24:42,673 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 35 transitions. [2018-11-23 13:24:42,674 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2018-11-23 13:24:42,675 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 35 transitions. [2018-11-23 13:24:42,675 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2018-11-23 13:24:42,675 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2018-11-23 13:24:42,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 35 transitions. [2018-11-23 13:24:42,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:42,676 INFO L705 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-11-23 13:24:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 35 transitions. [2018-11-23 13:24:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-23 13:24:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-23 13:24:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2018-11-23 13:24:42,678 INFO L728 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-11-23 13:24:42,678 INFO L608 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-11-23 13:24:42,679 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 13:24:42,679 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 35 transitions. [2018-11-23 13:24:42,679 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2018-11-23 13:24:42,679 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:42,680 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:42,680 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:24:42,680 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1] [2018-11-23 13:24:42,680 INFO L794 eck$LassoCheckResult]: Stem: 360#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 354#L18 assume !(main_~i~0 <= 0); 347#L20 call main_#t~ret3 := rec(main_~i~0);< 346#recENTRY ~a := #in~a; 348#L5 assume !(0 == ~a); 350#L8 call #t~ret0 := rec(~a - 1);< 349#recENTRY ~a := #in~a; 353#L5 assume 0 == ~a;#res := 0; 355#recFINAL assume true; 366#recEXIT >#45#return; 373#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 358#L10-2 assume !(~rescopy~0 > 0); 359#L10-3 #res := 1 + ~res~0; 374#recFINAL assume true; 367#recEXIT >#47#return; 356#L20-1 main_~res~1 := main_#t~ret3;havoc main_#t~ret3; 357#L21-2 [2018-11-23 13:24:42,680 INFO L796 eck$LassoCheckResult]: Loop: 357#L21-2 assume !!(main_~res~1 < 1); 357#L21-2 [2018-11-23 13:24:42,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1423892654, now seen corresponding path program 1 times [2018-11-23 13:24:42,681 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,691 INFO L82 PathProgramCache]: Analyzing trace with hash 69, now seen corresponding path program 2 times [2018-11-23 13:24:42,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1190999276, now seen corresponding path program 1 times [2018-11-23 13:24:42,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:24:42,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 13:24:42,742 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 13:24:42,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-23 13:24:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 13:24:42,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-23 13:24:42,745 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. cyclomatic complexity: 9 Second operand 9 states. [2018-11-23 13:24:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:24:42,797 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2018-11-23 13:24:42,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 13:24:42,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 41 transitions. [2018-11-23 13:24:42,799 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2018-11-23 13:24:42,799 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 26 states and 32 transitions. [2018-11-23 13:24:42,799 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2018-11-23 13:24:42,799 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2018-11-23 13:24:42,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 32 transitions. [2018-11-23 13:24:42,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:42,800 INFO L705 BuchiCegarLoop]: Abstraction has 26 states and 32 transitions. [2018-11-23 13:24:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 32 transitions. [2018-11-23 13:24:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2018-11-23 13:24:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 13:24:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-11-23 13:24:42,804 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-11-23 13:24:42,804 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-11-23 13:24:42,804 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 13:24:42,804 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 22 transitions. [2018-11-23 13:24:42,805 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2018-11-23 13:24:42,805 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:42,805 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:42,805 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 13:24:42,805 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1] [2018-11-23 13:24:42,806 INFO L794 eck$LassoCheckResult]: Stem: 434#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 435#L18 assume !(main_~i~0 <= 0); 427#L20 call main_#t~ret3 := rec(main_~i~0);< 426#recENTRY ~a := #in~a; 428#L5 assume !(0 == ~a); 430#L8 call #t~ret0 := rec(~a - 1);< 429#recENTRY ~a := #in~a; 432#L5 assume !(0 == ~a); 431#L8 call #t~ret0 := rec(~a - 1);< 429#recENTRY ~a := #in~a; 433#L5 assume 0 == ~a;#res := 0; 444#recFINAL assume true; 441#recEXIT >#45#return; 442#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 436#L10-2 assume !(~rescopy~0 > 0); 437#L10-3 #res := 1 + ~res~0; 440#recFINAL assume true; 443#recEXIT >#45#return; 438#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 439#L10-2 [2018-11-23 13:24:42,806 INFO L796 eck$LassoCheckResult]: Loop: 439#L10-2 assume !!(~rescopy~0 > 0);#t~post1 := ~rescopy~0;~rescopy~0 := #t~post1 - 1;havoc #t~post1; 439#L10-2 [2018-11-23 13:24:42,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash -274003163, now seen corresponding path program 1 times [2018-11-23 13:24:42,806 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 2 times [2018-11-23 13:24:42,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:24:42,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 95836554, now seen corresponding path program 1 times [2018-11-23 13:24:42,820 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:42,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:42,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:24:42,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:42,852 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:42,852 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:42,852 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:42,852 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:42,852 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:24:42,852 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:42,852 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:42,852 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:42,852 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3_true-termination_true-no-overflow.c_Iteration5_Loop [2018-11-23 13:24:42,852 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:42,852 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:42,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,864 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:42,864 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:42,868 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:42,869 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428814e3-c6b1-448d-907b-11c08b3eea0c/bin-2019/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 [2018-11-23 13:24:42,895 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:24:42,896 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:42,912 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:24:42,914 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:42,914 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:42,914 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:42,914 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:42,914 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:24:42,914 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:42,914 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:42,914 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:42,914 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3_true-termination_true-no-overflow.c_Iteration5_Loop [2018-11-23 13:24:42,914 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:42,914 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:42,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:42,929 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:42,929 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:24:42,929 INFO L122 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 [2018-11-23 13:24:42,929 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:42,930 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:42,930 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:42,930 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:42,930 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:42,930 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:42,930 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:42,931 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:24:42,932 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:24:42,932 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:24:42,932 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:24:42,932 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:24:42,932 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:24:42,932 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec_~rescopy~0) = 1*rec_~rescopy~0 Supporting invariants [] [2018-11-23 13:24:42,932 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:24:42,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:42,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:42,990 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2018-11-23 13:24:42,990 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5 Second operand 3 states. [2018-11-23 13:24:43,017 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 25 states and 29 transitions. Complement of second has 7 states. [2018-11-23 13:24:43,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 13:24:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2018-11-23 13:24:43,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 19 letters. Loop has 1 letters. [2018-11-23 13:24:43,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:43,018 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:24:43,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:43,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:43,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:43,060 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 1 loop predicates [2018-11-23 13:24:43,060 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5 Second operand 3 states. [2018-11-23 13:24:43,085 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 25 states and 29 transitions. Complement of second has 7 states. [2018-11-23 13:24:43,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 13:24:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2018-11-23 13:24:43,086 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 19 letters. Loop has 1 letters. [2018-11-23 13:24:43,086 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:43,086 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:24:43,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:43,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:43,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:43,129 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2018-11-23 13:24:43,129 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5 Second operand 3 states. [2018-11-23 13:24:43,151 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 32 states and 40 transitions. Complement of second has 9 states. [2018-11-23 13:24:43,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 13:24:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2018-11-23 13:24:43,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 19 letters. Loop has 1 letters. [2018-11-23 13:24:43,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:43,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 20 letters. Loop has 1 letters. [2018-11-23 13:24:43,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:43,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 19 letters. Loop has 2 letters. [2018-11-23 13:24:43,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:43,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 40 transitions. [2018-11-23 13:24:43,153 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 13:24:43,153 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 0 states and 0 transitions. [2018-11-23 13:24:43,153 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 13:24:43,153 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 13:24:43,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 13:24:43,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 13:24:43,153 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 13:24:43,154 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 13:24:43,154 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 13:24:43,154 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 13:24:43,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 13:24:43,154 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 13:24:43,154 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 13:24:43,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 01:24:43 BoogieIcfgContainer [2018-11-23 13:24:43,160 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 13:24:43,161 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 13:24:43,161 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 13:24:43,161 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 13:24:43,162 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:24:40" (3/4) ... [2018-11-23 13:24:43,164 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 13:24:43,164 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 13:24:43,165 INFO L168 Benchmark]: Toolchain (without parser) took 2865.82 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 231.2 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -178.3 MB). Peak memory consumption was 52.9 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:43,166 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 13:24:43,167 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.61 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:43,167 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.75 ms. Allocated memory is still 1.0 GB. Free memory was 947.8 MB in the beginning and 945.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:43,168 INFO L168 Benchmark]: Boogie Preprocessor took 12.20 ms. Allocated memory is still 1.0 GB. Free memory is still 945.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 13:24:43,168 INFO L168 Benchmark]: RCFGBuilder took 190.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 945.1 MB in the beginning and 1.1 GB in the end (delta: -195.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:43,168 INFO L168 Benchmark]: BuchiAutomizer took 2479.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.0 MB). Peak memory consumption was 77.9 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:43,169 INFO L168 Benchmark]: Witness Printer took 3.65 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 13:24:43,171 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.61 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.75 ms. Allocated memory is still 1.0 GB. Free memory was 947.8 MB in the beginning and 945.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.20 ms. Allocated memory is still 1.0 GB. Free memory is still 945.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 190.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 945.1 MB in the beginning and 1.1 GB in the end (delta: -195.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2479.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.0 MB). Peak memory consumption was 77.9 MB. Max. memory is 11.5 GB. * Witness Printer took 3.65 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. 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 6 terminating modules (3 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(a) and consists of 5 locations. One deterministic module has affine ranking function rescopy and consists of 4 locations. One nondeterministic module has affine ranking function rescopy and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.4s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 1.6s. Construction of modules took 0.1s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 29 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 100 SDtfs, 95 SDslu, 152 SDs, 0 SdLazy, 102 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc1 concLT1 SILN1 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq169 hnf94 smp100 dnf124 smp100 tf108 neg97 sie113 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 95ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 17 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...