./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.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_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 871be16186d4378aec884efd2352a47ca4eb57bc ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 21:41:56,813 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 21:41:56,814 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 21:41:56,820 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 21:41:56,821 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 21:41:56,821 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 21:41:56,822 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 21:41:56,823 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 21:41:56,824 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 21:41:56,825 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 21:41:56,826 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 21:41:56,826 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 21:41:56,826 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 21:41:56,827 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 21:41:56,827 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 21:41:56,828 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 21:41:56,828 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 21:41:56,829 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 21:41:56,830 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 21:41:56,831 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 21:41:56,831 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 21:41:56,832 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 21:41:56,833 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 21:41:56,833 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 21:41:56,833 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 21:41:56,834 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 21:41:56,834 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 21:41:56,835 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 21:41:56,835 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 21:41:56,836 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 21:41:56,836 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 21:41:56,836 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 21:41:56,837 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 21:41:56,837 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 21:41:56,837 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 21:41:56,838 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 21:41:56,838 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-22 21:41:56,848 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 21:41:56,848 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 21:41:56,849 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 21:41:56,849 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 21:41:56,849 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 21:41:56,850 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-22 21:41:56,850 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-22 21:41:56,850 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-22 21:41:56,850 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-22 21:41:56,850 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-22 21:41:56,850 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-22 21:41:56,850 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 21:41:56,851 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-22 21:41:56,852 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 21:41:56,852 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-22 21:41:56,852 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 21:41:56,852 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 21:41:56,852 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-22 21:41:56,852 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 21:41:56,852 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 21:41:56,853 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-22 21:41:56,853 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-22 21:41:56,853 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_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 -> 871be16186d4378aec884efd2352a47ca4eb57bc [2018-11-22 21:41:56,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 21:41:56,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 21:41:56,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 21:41:56,890 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 21:41:56,890 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 21:41:56,891 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-22 21:41:56,933 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/data/5796e6e79/1bc5dbabb8d34306b0361b8fdda9f961/FLAG5878a0e38 [2018-11-22 21:41:57,334 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 21:41:57,335 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-22 21:41:57,339 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/data/5796e6e79/1bc5dbabb8d34306b0361b8fdda9f961/FLAG5878a0e38 [2018-11-22 21:41:57,350 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/data/5796e6e79/1bc5dbabb8d34306b0361b8fdda9f961 [2018-11-22 21:41:57,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 21:41:57,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 21:41:57,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 21:41:57,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 21:41:57,358 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 21:41:57,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c47d32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57, skipping insertion in model container [2018-11-22 21:41:57,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 21:41:57,382 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 21:41:57,484 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 21:41:57,486 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 21:41:57,494 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 21:41:57,501 INFO L195 MainTranslator]: Completed translation [2018-11-22 21:41:57,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57 WrapperNode [2018-11-22 21:41:57,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 21:41:57,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 21:41:57,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 21:41:57,502 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 21:41:57,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 21:41:57,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 21:41:57,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 21:41:57,519 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 21:41:57,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... [2018-11-22 21:41:57,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 21:41:57,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 21:41:57,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 21:41:57,528 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 21:41:57,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:41:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 21:41:57,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 21:41:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2018-11-22 21:41:57,603 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2018-11-22 21:41:57,679 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 21:41:57,679 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-22 21:41:57,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:41:57 BoogieIcfgContainer [2018-11-22 21:41:57,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 21:41:57,680 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-22 21:41:57,680 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-22 21:41:57,683 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-22 21:41:57,683 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 21:41:57,683 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.11 09:41:57" (1/3) ... [2018-11-22 21:41:57,684 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@786c454b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 09:41:57, skipping insertion in model container [2018-11-22 21:41:57,684 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 21:41:57,684 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:57" (2/3) ... [2018-11-22 21:41:57,684 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@786c454b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 09:41:57, skipping insertion in model container [2018-11-22 21:41:57,684 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 21:41:57,685 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:41:57" (3/3) ... [2018-11-22 21:41:57,686 INFO L375 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-22 21:41:57,724 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 21:41:57,725 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-22 21:41:57,725 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-22 21:41:57,725 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-22 21:41:57,725 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 21:41:57,725 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 21:41:57,725 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-22 21:41:57,725 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 21:41:57,725 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-22 21:41:57,733 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2018-11-22 21:41:57,750 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-22 21:41:57,750 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 21:41:57,750 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 21:41:57,755 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-22 21:41:57,755 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-22 21:41:57,755 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-22 21:41:57,755 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2018-11-22 21:41:57,756 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-22 21:41:57,756 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 21:41:57,756 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 21:41:57,757 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-22 21:41:57,757 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-22 21:41:57,761 INFO L794 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 4#L16true call main_#t~ret3 := mc91(main_~x~0);< 5#mc91ENTRYtrue [2018-11-22 21:41:57,762 INFO L796 eck$LassoCheckResult]: Loop: 5#mc91ENTRYtrue ~n := #in~n; 9#L10true assume !(~n > 100); 11#L11true call #t~ret0 := mc91(11 + ~n);< 5#mc91ENTRYtrue [2018-11-22 21:41:57,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:41:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1008, now seen corresponding path program 1 times [2018-11-22 21:41:57,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:41:57,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:41:57,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:57,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:41:57,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:57,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:41:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash 36877, now seen corresponding path program 1 times [2018-11-22 21:41:57,823 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:41:57,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:41:57,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:57,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:41:57,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:57,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:41:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 30036414, now seen corresponding path program 1 times [2018-11-22 21:41:57,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:41:57,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:41:57,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:57,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:41:57,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:57,897 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:41:57,898 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:41:57,898 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:41:57,898 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:41:57,899 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 21:41:57,899 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:41:57,899 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:41:57,899 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:41:57,899 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-22 21:41:57,899 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:41:57,899 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:41:57,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:57,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:57,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:57,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:57,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:57,993 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:41:57,993 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:41:57,997 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:41:57,997 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:41:58,017 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 21:41:58,017 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:41:58,035 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 21:41:58,036 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:41:58,036 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:41:58,037 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:41:58,037 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:41:58,037 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 21:41:58,037 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:41:58,037 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:41:58,037 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:41:58,037 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-22 21:41:58,037 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:41:58,037 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:41:58,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,086 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:41:58,090 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 21:41:58,091 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 [2018-11-22 21:41:58,092 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:41:58,092 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:41:58,093 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:41:58,093 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:41:58,093 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:41:58,095 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:41:58,095 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:41:58,102 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 21:41:58,107 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 21:41:58,107 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-22 21:41:58,108 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 21:41:58,108 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 21:41:58,109 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 21:41:58,109 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2018-11-22 21:41:58,111 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 21:41:58,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:41:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:41:58,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:41:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:41:58,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:41:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:41:58,218 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-22 21:41:58,219 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2018-11-22 21:41:58,299 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states.. Second operand 4 states. Result 31 states and 38 transitions. Complement of second has 12 states. [2018-11-22 21:41:58,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-22 21:41:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-22 21:41:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2018-11-22 21:41:58,302 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2018-11-22 21:41:58,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:41:58,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2018-11-22 21:41:58,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:41:58,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2018-11-22 21:41:58,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:41:58,304 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 38 transitions. [2018-11-22 21:41:58,307 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-22 21:41:58,312 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 18 states and 24 transitions. [2018-11-22 21:41:58,313 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-11-22 21:41:58,313 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2018-11-22 21:41:58,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2018-11-22 21:41:58,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 21:41:58,314 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2018-11-22 21:41:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2018-11-22 21:41:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2018-11-22 21:41:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-22 21:41:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2018-11-22 21:41:58,338 INFO L728 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-11-22 21:41:58,338 INFO L608 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-11-22 21:41:58,338 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-22 21:41:58,338 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 20 transitions. [2018-11-22 21:41:58,339 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-22 21:41:58,339 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 21:41:58,339 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 21:41:58,339 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:41:58,339 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-11-22 21:41:58,340 INFO L794 eck$LassoCheckResult]: Stem: 100#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 96#L16 call main_#t~ret3 := mc91(main_~x~0);< 101#mc91ENTRY ~n := #in~n; 105#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 107#mc91ENTRY ~n := #in~n; 103#L10 assume ~n > 100;#res := ~n - 10; 104#mc91FINAL assume true; 102#mc91EXIT >#19#return; 97#L11-1 [2018-11-22 21:41:58,340 INFO L796 eck$LassoCheckResult]: Loop: 97#L11-1 call #t~ret1 := mc91(#t~ret0);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume !(~n > 100); 95#L11 call #t~ret0 := mc91(11 + ~n);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume ~n > 100;#res := ~n - 10; 99#mc91FINAL assume true; 108#mc91EXIT >#19#return; 97#L11-1 [2018-11-22 21:41:58,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:41:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1934452539, now seen corresponding path program 1 times [2018-11-22 21:41:58,340 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:41:58,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:41:58,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:58,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:41:58,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:58,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:41:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 1 times [2018-11-22 21:41:58,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:41:58,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:41:58,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:58,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:41:58,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:58,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:41:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash 418213862, now seen corresponding path program 1 times [2018-11-22 21:41:58,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:41:58,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:41:58,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:58,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:41:58,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:41:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:41:58,462 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:41:58,462 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:41:58,462 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:41:58,463 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:41:58,463 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 21:41:58,463 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:41:58,463 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:41:58,463 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:41:58,463 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-22 21:41:58,463 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:41:58,463 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:41:58,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:41:58,503 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:41:58,503 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:41:58,505 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:41:58,506 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:41:58,509 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:41:58,509 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:41:58,525 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:41:58,525 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:41:58,527 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:41:58,527 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:41:58,551 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:41:58,551 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:41:58,586 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 21:41:58,586 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:10,616 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-11-22 21:42:10,619 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:42:10,619 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:42:10,619 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:42:10,619 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:42:10,619 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 21:42:10,619 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:42:10,619 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:42:10,619 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:42:10,619 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-22 21:42:10,619 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:42:10,619 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:42:10,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:10,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:10,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:10,662 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:42:10,662 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 21:42:10,662 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 [2018-11-22 21:42:10,663 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:10,663 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:10,664 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:10,664 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:10,664 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:10,664 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:10,664 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:10,666 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:10,666 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 [2018-11-22 21:42:10,667 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:10,667 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:10,667 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:10,667 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:10,667 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:10,667 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:10,667 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:10,668 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:10,668 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 [2018-11-22 21:42:10,669 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:10,669 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:10,669 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:10,669 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:10,669 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:10,670 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:10,670 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:10,677 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 21:42:10,682 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 21:42:10,682 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-22 21:42:10,682 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 21:42:10,682 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 21:42:10,682 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 21:42:10,683 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-11-22 21:42:10,683 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 21:42:10,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:10,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:10,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:42:10,828 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2018-11-22 21:42:10,828 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6 Second operand 9 states. [2018-11-22 21:42:10,985 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 50 states and 72 transitions. Complement of second has 32 states. [2018-11-22 21:42:10,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-22 21:42:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-11-22 21:42:10,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 8 letters. [2018-11-22 21:42:10,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:10,988 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 17 letters. Loop has 8 letters. [2018-11-22 21:42:10,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:10,989 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 16 letters. [2018-11-22 21:42:10,989 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:10,989 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 72 transitions. [2018-11-22 21:42:10,993 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-11-22 21:42:10,995 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 41 states and 61 transitions. [2018-11-22 21:42:10,995 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-22 21:42:10,996 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2018-11-22 21:42:10,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 61 transitions. [2018-11-22 21:42:10,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 21:42:10,996 INFO L705 BuchiCegarLoop]: Abstraction has 41 states and 61 transitions. [2018-11-22 21:42:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 61 transitions. [2018-11-22 21:42:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2018-11-22 21:42:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-22 21:42:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2018-11-22 21:42:11,000 INFO L728 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2018-11-22 21:42:11,000 INFO L608 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2018-11-22 21:42:11,000 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-22 21:42:11,000 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 50 transitions. [2018-11-22 21:42:11,001 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-11-22 21:42:11,001 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 21:42:11,001 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 21:42:11,002 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:42:11,002 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-22 21:42:11,002 INFO L794 eck$LassoCheckResult]: Stem: 288#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 283#L16 call main_#t~ret3 := mc91(main_~x~0);< 289#mc91ENTRY ~n := #in~n; 295#L10 assume !(~n > 100); 284#L11 call #t~ret0 := mc91(11 + ~n);< 297#mc91ENTRY ~n := #in~n; 300#L10 assume ~n > 100;#res := ~n - 10; 306#mc91FINAL assume true; 305#mc91EXIT >#19#return; 277#L11-1 call #t~ret1 := mc91(#t~ret0);< 292#mc91ENTRY ~n := #in~n; 309#L10 assume !(~n > 100); 294#L11 [2018-11-22 21:42:11,002 INFO L796 eck$LassoCheckResult]: Loop: 294#L11 call #t~ret0 := mc91(11 + ~n);< 296#mc91ENTRY ~n := #in~n; 293#L10 assume !(~n > 100); 294#L11 [2018-11-22 21:42:11,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash 595607827, now seen corresponding path program 2 times [2018-11-22 21:42:11,002 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:11,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:11,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:11,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:42:11,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:11,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash 47317, now seen corresponding path program 2 times [2018-11-22 21:42:11,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:11,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:11,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:11,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:42:11,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:11,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:11,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1242891907, now seen corresponding path program 3 times [2018-11-22 21:42:11,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:11,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:11,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:11,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:42:11,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-22 21:42:11,071 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 21:42:11,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-22 21:42:11,097 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:42:11,097 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:42:11,097 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:42:11,097 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:42:11,098 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 21:42:11,098 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:42:11,098 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:42:11,098 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:42:11,098 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-22 21:42:11,098 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:42:11,098 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:42:11,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:11,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:11,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:11,106 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:11,122 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:42:11,122 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:11,129 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:11,129 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:11,131 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:42:11,131 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:11,146 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:11,146 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:11,148 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:42:11,148 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:11,163 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:11,163 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:11,183 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 21:42:11,184 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:23,205 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-11-22 21:42:23,208 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:42:23,208 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:42:23,208 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:42:23,208 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:42:23,208 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 21:42:23,208 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:42:23,208 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:42:23,209 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:42:23,209 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-22 21:42:23,209 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:42:23,209 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:42:23,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,231 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:42:23,231 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 21:42:23,231 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 [2018-11-22 21:42:23,232 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:23,232 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:23,232 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:23,232 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:23,232 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:23,233 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:23,233 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:23,234 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:23,234 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 [2018-11-22 21:42:23,234 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:23,235 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:23,235 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:23,235 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:23,235 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:23,235 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:23,235 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:23,236 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:23,236 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 [2018-11-22 21:42:23,236 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:23,237 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:23,237 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:23,237 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:23,237 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:23,237 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:23,237 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:23,240 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 21:42:23,242 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 21:42:23,242 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-22 21:42:23,242 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 21:42:23,242 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 21:42:23,242 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 21:42:23,242 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2018-11-22 21:42:23,243 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 21:42:23,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:23,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:23,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:42:23,321 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 [2018-11-22 21:42:23,321 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-11-22 21:42:23,377 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2018-11-22 21:42:23,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-22 21:42:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-11-22 21:42:23,380 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-22 21:42:23,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:23,380 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 21:42:23,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:23,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:23,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:42:23,427 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-22 21:42:23,427 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-11-22 21:42:23,465 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2018-11-22 21:42:23,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-22 21:42:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-11-22 21:42:23,466 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-22 21:42:23,466 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:23,466 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 21:42:23,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:23,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:23,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:42:23,527 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 3 loop predicates [2018-11-22 21:42:23,527 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-11-22 21:42:23,581 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 70 states and 99 transitions. Complement of second has 16 states. [2018-11-22 21:42:23,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-22 21:42:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2018-11-22 21:42:23,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-22 21:42:23,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:23,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 15 letters. Loop has 3 letters. [2018-11-22 21:42:23,583 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:23,583 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 6 letters. [2018-11-22 21:42:23,583 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:23,583 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 70 states and 99 transitions. [2018-11-22 21:42:23,585 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-22 21:42:23,586 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 70 states to 47 states and 73 transitions. [2018-11-22 21:42:23,586 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-22 21:42:23,587 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-11-22 21:42:23,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 73 transitions. [2018-11-22 21:42:23,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 21:42:23,587 INFO L705 BuchiCegarLoop]: Abstraction has 47 states and 73 transitions. [2018-11-22 21:42:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 73 transitions. [2018-11-22 21:42:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2018-11-22 21:42:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-22 21:42:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2018-11-22 21:42:23,590 INFO L728 BuchiCegarLoop]: Abstraction has 41 states and 59 transitions. [2018-11-22 21:42:23,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 21:42:23,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-22 21:42:23,593 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand 8 states. [2018-11-22 21:42:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:42:23,661 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2018-11-22 21:42:23,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 21:42:23,661 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2018-11-22 21:42:23,663 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-22 21:42:23,666 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 57 states and 74 transitions. [2018-11-22 21:42:23,666 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2018-11-22 21:42:23,666 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2018-11-22 21:42:23,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 74 transitions. [2018-11-22 21:42:23,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 21:42:23,667 INFO L705 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2018-11-22 21:42:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 74 transitions. [2018-11-22 21:42:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-11-22 21:42:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-22 21:42:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2018-11-22 21:42:23,671 INFO L728 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2018-11-22 21:42:23,671 INFO L608 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2018-11-22 21:42:23,671 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-22 21:42:23,672 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 73 transitions. [2018-11-22 21:42:23,673 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-22 21:42:23,673 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 21:42:23,673 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 21:42:23,674 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-22 21:42:23,674 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2018-11-22 21:42:23,674 INFO L794 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 815#L16 call main_#t~ret3 := mc91(main_~x~0);< 816#mc91ENTRY ~n := #in~n; 842#L10 assume !(~n > 100); 834#L11 call #t~ret0 := mc91(11 + ~n);< 838#mc91ENTRY ~n := #in~n; 840#L10 assume !(~n > 100); 835#L11 call #t~ret0 := mc91(11 + ~n);< 837#mc91ENTRY ~n := #in~n; 841#L10 assume ~n > 100;#res := ~n - 10; 839#mc91FINAL assume true; 836#mc91EXIT >#19#return; 804#L11-1 call #t~ret1 := mc91(#t~ret0);< 821#mc91ENTRY ~n := #in~n; 855#L10 assume ~n > 100;#res := ~n - 10; 853#mc91FINAL assume true; 851#mc91EXIT >#21#return; 811#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 848#mc91FINAL assume true; 847#mc91EXIT >#19#return; 809#L11-1 call #t~ret1 := mc91(#t~ret0);< 846#mc91ENTRY [2018-11-22 21:42:23,674 INFO L796 eck$LassoCheckResult]: Loop: 846#mc91ENTRY ~n := #in~n; 843#L10 assume !(~n > 100); 818#L11 call #t~ret0 := mc91(11 + ~n);< 827#mc91ENTRY ~n := #in~n; 824#L10 assume !(~n > 100); 817#L11 call #t~ret0 := mc91(11 + ~n);< 828#mc91ENTRY ~n := #in~n; 822#L10 assume ~n > 100;#res := ~n - 10; 823#mc91FINAL assume true; 857#mc91EXIT >#19#return; 805#L11-1 call #t~ret1 := mc91(#t~ret0);< 819#mc91ENTRY ~n := #in~n; 844#L10 assume ~n > 100;#res := ~n - 10; 845#mc91FINAL assume true; 849#mc91EXIT >#21#return; 811#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 848#mc91FINAL assume true; 847#mc91EXIT >#19#return; 810#L11-1 call #t~ret1 := mc91(#t~ret0);< 846#mc91ENTRY [2018-11-22 21:42:23,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash -104606680, now seen corresponding path program 1 times [2018-11-22 21:42:23,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:23,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:23,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:23,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:42:23,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:23,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash -735472521, now seen corresponding path program 1 times [2018-11-22 21:42:23,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:23,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:23,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:23,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:42:23,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:23,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash -726341392, now seen corresponding path program 2 times [2018-11-22 21:42:23,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:23,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:23,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:23,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:42:23,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-22 21:42:23,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:42:23,746 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:42:23,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 21:42:23,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 21:42:23,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:42:23,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-22 21:42:23,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:42:23,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-22 21:42:23,925 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:42:23,925 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:42:23,925 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:42:23,925 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:42:23,925 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 21:42:23,926 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:42:23,926 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:42:23,926 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:42:23,926 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-22 21:42:23,926 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:42:23,926 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:42:23,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:23,957 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:42:23,957 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:23,971 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:23,971 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:23,974 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:42:23,974 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:23,990 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:23,990 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:23,992 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:42:23,992 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:24,007 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:24,007 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:24,009 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:42:24,009 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:24,023 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:24,024 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:24,041 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 21:42:24,041 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:24,067 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 21:42:24,068 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:42:24,069 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:42:24,069 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:42:24,069 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:42:24,069 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 21:42:24,069 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:42:24,069 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:42:24,069 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:42:24,069 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-22 21:42:24,069 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:42:24,069 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:42:24,070 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:24,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:24,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:24,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:24,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:24,090 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:42:24,090 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 21:42:24,090 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 [2018-11-22 21:42:24,091 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:24,091 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:24,091 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:24,091 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:24,091 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:24,092 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:24,092 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:24,092 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:24,093 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 [2018-11-22 21:42:24,093 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:24,093 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:24,093 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:24,093 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:24,093 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:24,093 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:24,093 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:24,094 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:24,094 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 [2018-11-22 21:42:24,094 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:24,094 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:24,094 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:24,094 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:24,094 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:24,095 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:24,095 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:24,095 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:24,095 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 [2018-11-22 21:42:24,095 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:24,096 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:24,096 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:24,096 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:24,096 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:24,096 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:24,096 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:24,098 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 21:42:24,099 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 21:42:24,099 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-22 21:42:24,099 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 21:42:24,100 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 21:42:24,100 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 21:42:24,100 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2018-11-22 21:42:24,100 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 21:42:24,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:24,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:24,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-22 21:42:24,272 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2018-11-22 21:42:24,272 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-11-22 21:42:24,563 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2018-11-22 21:42:24,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-22 21:42:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2018-11-22 21:42:24,564 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2018-11-22 21:42:24,564 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:24,564 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 21:42:24,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:24,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:24,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-22 21:42:24,707 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2018-11-22 21:42:24,707 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-11-22 21:42:24,944 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2018-11-22 21:42:24,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-22 21:42:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2018-11-22 21:42:24,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2018-11-22 21:42:24,945 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:24,945 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 21:42:24,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:24,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:24,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-22 21:42:25,093 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 10 loop predicates [2018-11-22 21:42:25,093 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-11-22 21:42:25,538 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 430 states and 530 transitions. Complement of second has 216 states. [2018-11-22 21:42:25,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 20 states 2 stem states 17 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-22 21:42:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 48 transitions. [2018-11-22 21:42:25,539 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 19 letters. [2018-11-22 21:42:25,540 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:25,540 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 40 letters. Loop has 19 letters. [2018-11-22 21:42:25,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:25,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 38 letters. [2018-11-22 21:42:25,546 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:25,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 530 transitions. [2018-11-22 21:42:25,552 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 29 [2018-11-22 21:42:25,555 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 202 states and 268 transitions. [2018-11-22 21:42:25,555 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2018-11-22 21:42:25,556 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2018-11-22 21:42:25,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 202 states and 268 transitions. [2018-11-22 21:42:25,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 21:42:25,556 INFO L705 BuchiCegarLoop]: Abstraction has 202 states and 268 transitions. [2018-11-22 21:42:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states and 268 transitions. [2018-11-22 21:42:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2018-11-22 21:42:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-22 21:42:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2018-11-22 21:42:25,567 INFO L728 BuchiCegarLoop]: Abstraction has 156 states and 197 transitions. [2018-11-22 21:42:25,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 21:42:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-22 21:42:25,567 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand 9 states. [2018-11-22 21:42:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:42:25,734 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2018-11-22 21:42:25,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 21:42:25,735 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 158 states and 187 transitions. [2018-11-22 21:42:25,736 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-22 21:42:25,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 158 states to 103 states and 122 transitions. [2018-11-22 21:42:25,738 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2018-11-22 21:42:25,738 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 75 [2018-11-22 21:42:25,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 122 transitions. [2018-11-22 21:42:25,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 21:42:25,738 INFO L705 BuchiCegarLoop]: Abstraction has 103 states and 122 transitions. [2018-11-22 21:42:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states and 122 transitions. [2018-11-22 21:42:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-11-22 21:42:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-22 21:42:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-11-22 21:42:25,743 INFO L728 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-11-22 21:42:25,743 INFO L608 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-11-22 21:42:25,743 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-22 21:42:25,743 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 99 states and 118 transitions. [2018-11-22 21:42:25,744 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-22 21:42:25,744 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 21:42:25,744 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 21:42:25,745 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1] [2018-11-22 21:42:25,745 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-11-22 21:42:25,745 INFO L794 eck$LassoCheckResult]: Stem: 2791#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 2792#L16 call main_#t~ret3 := mc91(main_~x~0);< 2793#mc91ENTRY ~n := #in~n; 2835#L10 assume !(~n > 100); 2810#L11 call #t~ret0 := mc91(11 + ~n);< 2811#mc91ENTRY ~n := #in~n; 2829#L10 assume !(~n > 100); 2823#L11 call #t~ret0 := mc91(11 + ~n);< 2827#mc91ENTRY ~n := #in~n; 2830#L10 assume ~n > 100;#res := ~n - 10; 2828#mc91FINAL assume true; 2826#mc91EXIT >#19#return; 2822#L11-1 call #t~ret1 := mc91(#t~ret0);< 2825#mc91ENTRY ~n := #in~n; 2852#L10 assume ~n > 100;#res := ~n - 10; 2844#mc91FINAL assume true; 2843#mc91EXIT >#21#return; 2841#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2840#mc91FINAL assume true; 2839#mc91EXIT >#19#return; 2831#L11-1 call #t~ret1 := mc91(#t~ret0);< 2838#mc91ENTRY ~n := #in~n; 2836#L10 assume !(~n > 100); 2803#L11 call #t~ret0 := mc91(11 + ~n);< 2812#mc91ENTRY ~n := #in~n; 2802#L10 assume !(~n > 100); 2795#L11 call #t~ret0 := mc91(11 + ~n);< 2834#mc91ENTRY ~n := #in~n; 2883#L10 assume ~n > 100;#res := ~n - 10; 2882#mc91FINAL assume true; 2794#mc91EXIT >#19#return; 2796#L11-1 [2018-11-22 21:42:25,745 INFO L796 eck$LassoCheckResult]: Loop: 2796#L11-1 call #t~ret1 := mc91(#t~ret0);< 2804#mc91ENTRY ~n := #in~n; 2819#L10 assume !(~n > 100); 2808#L11 call #t~ret0 := mc91(11 + ~n);< 2809#mc91ENTRY ~n := #in~n; 2881#L10 assume ~n > 100;#res := ~n - 10; 2880#mc91FINAL assume true; 2879#mc91EXIT >#19#return; 2796#L11-1 [2018-11-22 21:42:25,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1788916079, now seen corresponding path program 3 times [2018-11-22 21:42:25,745 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:25,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:25,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:25,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:42:25,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-22 21:42:25,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:42:25,788 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:42:25,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 21:42:25,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-22 21:42:25,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:42:25,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-22 21:42:25,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 21:42:25,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2018-11-22 21:42:25,831 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-22 21:42:25,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:25,832 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 2 times [2018-11-22 21:42:25,832 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:42:25,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:42:25,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:25,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:42:25,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:42:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 21:42:25,884 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:42:25,884 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:42:25,884 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:42:25,884 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:42:25,884 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 21:42:25,884 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:42:25,884 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:42:25,884 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:42:25,885 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-22 21:42:25,885 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:42:25,885 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:42:25,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:25,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:25,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:25,912 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:42:25,912 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:25,919 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:25,919 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:25,922 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 21:42:25,922 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:25,939 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 21:42:25,939 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5ad94d6a-16a1-464f-ba75-087a2913ddeb/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 [2018-11-22 21:42:25,960 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 21:42:25,960 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 21:42:37,987 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-11-22 21:42:37,990 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 21:42:37,990 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 21:42:37,990 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 21:42:37,990 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 21:42:37,990 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 21:42:37,990 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 21:42:37,990 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 21:42:37,990 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 21:42:37,990 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-22 21:42:37,990 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 21:42:37,991 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 21:42:37,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:37,992 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:37,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 21:42:38,013 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 21:42:38,013 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 21:42:38,014 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 [2018-11-22 21:42:38,014 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:38,014 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:38,014 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:38,014 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:38,014 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:38,015 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:38,015 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:38,015 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 21:42:38,016 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 [2018-11-22 21:42:38,016 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 21:42:38,016 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 21:42:38,016 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 21:42:38,016 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 21:42:38,016 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 21:42:38,017 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 21:42:38,017 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 21:42:38,020 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 21:42:38,022 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 21:42:38,022 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-22 21:42:38,022 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 21:42:38,022 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 21:42:38,023 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 21:42:38,023 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-11-22 21:42:38,023 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 21:42:38,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:38,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:38,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:42:38,123 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2018-11-22 21:42:38,123 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-11-22 21:42:38,242 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2018-11-22 21:42:38,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-22 21:42:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-11-22 21:42:38,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2018-11-22 21:42:38,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:38,244 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 21:42:38,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:38,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:38,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:42:38,345 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2018-11-22 21:42:38,345 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-11-22 21:42:38,451 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2018-11-22 21:42:38,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-22 21:42:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-11-22 21:42:38,453 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2018-11-22 21:42:38,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:38,453 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 21:42:38,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:42:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:38,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:42:38,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:42:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:42:38,539 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 7 loop predicates [2018-11-22 21:42:38,539 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-11-22 21:42:38,662 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 180 states and 210 transitions. Complement of second has 27 states. [2018-11-22 21:42:38,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-22 21:42:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-22 21:42:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2018-11-22 21:42:38,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 8 letters. [2018-11-22 21:42:38,664 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:38,664 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 39 letters. Loop has 8 letters. [2018-11-22 21:42:38,664 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:38,664 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 16 letters. [2018-11-22 21:42:38,665 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 21:42:38,665 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 180 states and 210 transitions. [2018-11-22 21:42:38,670 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-22 21:42:38,670 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 180 states to 0 states and 0 transitions. [2018-11-22 21:42:38,670 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-22 21:42:38,670 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-22 21:42:38,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-22 21:42:38,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 21:42:38,670 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 21:42:38,670 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 21:42:38,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 21:42:38,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-22 21:42:38,670 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 9 states. [2018-11-22 21:42:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:42:38,670 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-11-22 21:42:38,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-22 21:42:38,671 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-11-22 21:42:38,671 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-22 21:42:38,671 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 21:42:38,671 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-22 21:42:38,671 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-22 21:42:38,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-22 21:42:38,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 21:42:38,671 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 21:42:38,671 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 21:42:38,671 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 21:42:38,671 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-22 21:42:38,671 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-22 21:42:38,671 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-22 21:42:38,671 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-22 21:42:38,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.11 09:42:38 BoogieIcfgContainer [2018-11-22 21:42:38,676 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-22 21:42:38,676 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 21:42:38,676 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 21:42:38,676 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 21:42:38,677 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:41:57" (3/4) ... [2018-11-22 21:42:38,679 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-22 21:42:38,680 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 21:42:38,680 INFO L168 Benchmark]: Toolchain (without parser) took 41326.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 961.9 MB in the beginning and 1.2 GB in the end (delta: -213.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:42:38,681 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:42:38,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.14 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 21:42:38,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.87 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-22 21:42:38,682 INFO L168 Benchmark]: Boogie Preprocessor took 8.36 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:42:38,683 INFO L168 Benchmark]: RCFGBuilder took 151.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -179.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-22 21:42:38,683 INFO L168 Benchmark]: BuchiAutomizer took 40995.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 44.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -50.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:42:38,684 INFO L168 Benchmark]: Witness Printer took 3.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 615.9 kB). Peak memory consumption was 615.9 kB. Max. memory is 11.5 GB. [2018-11-22 21:42:38,686 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 147.14 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 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 16.87 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 8.36 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 151.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -179.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 40995.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 44.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -50.0 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 3.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 615.9 kB). Peak memory consumption was 615.9 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (3 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function -2 * \old(n) + 211 and consists of 4 locations. One deterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. One nondeterministic module has affine ranking function -2 * n + 189 and consists of 6 locations. One nondeterministic module has affine ranking function -1 * \old(n) + 90 and consists of 20 locations. One nondeterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. 3 modules have a trivial ranking function, the largest among these consists of 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 40.9s and 6 iterations. TraceHistogramMax:7. Analysis of lassos took 37.6s. Construction of modules took 0.4s. Büchi inclusion checks took 2.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 65 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 99 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 12/24 HoareTripleCheckerStatistics: 155 SDtfs, 246 SDslu, 186 SDs, 0 SdLazy, 832 SolverSat, 222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf96 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq166 hnf92 smp94 dnf100 smp100 tf110 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 3 LassoNonterminationAnalysisTime: 36.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...