./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 554582d6fc3de8e87f5dd30e5019302b6e1b96be .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:55:52,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:55:52,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:55:52,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:55:52,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:55:52,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:55:52,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:55:52,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:55:52,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:55:52,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:55:52,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:55:52,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:55:52,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:55:52,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:55:52,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:55:52,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:55:52,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:55:52,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:55:52,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:55:52,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:55:52,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:55:52,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:55:52,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:55:52,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:55:52,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:55:52,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:55:52,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:55:52,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:55:52,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:55:52,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:55:52,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:55:52,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:55:52,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:55:52,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:55:52,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:55:52,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:55:52,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:55:52,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:55:52,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:55:52,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:55:52,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:55:52,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-10-22 08:55:52,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:55:52,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:55:52,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:55:52,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:55:52,946 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:55:52,946 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 08:55:52,946 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 08:55:52,946 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 08:55:52,946 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 08:55:52,947 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 08:55:52,947 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 08:55:52,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:55:52,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:55:52,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:55:52,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:55:52,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 08:55:52,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 08:55:52,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 08:55:52,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:55:52,948 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 08:55:52,948 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:55:52,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 08:55:52,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:55:52,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:55:52,949 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 08:55:52,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:55:52,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:55:52,950 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 08:55:52,952 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 08:55:52,952 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 554582d6fc3de8e87f5dd30e5019302b6e1b96be [2019-10-22 08:55:52,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:55:52,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:55:52,997 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:55:52,999 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:55:52,999 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:55:52,999 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c [2019-10-22 08:55:53,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/data/b724d4a2d/b83440356d3b432aad38783a93efdf27/FLAG87e71d3e8 [2019-10-22 08:55:53,428 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:55:53,428 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c [2019-10-22 08:55:53,435 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/data/b724d4a2d/b83440356d3b432aad38783a93efdf27/FLAG87e71d3e8 [2019-10-22 08:55:53,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/data/b724d4a2d/b83440356d3b432aad38783a93efdf27 [2019-10-22 08:55:53,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:55:53,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:55:53,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:53,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:55:53,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:55:53,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:53" (1/1) ... [2019-10-22 08:55:53,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314722d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:53, skipping insertion in model container [2019-10-22 08:55:53,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:53" (1/1) ... [2019-10-22 08:55:53,837 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:55:53,854 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:55:54,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:54,012 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:55:54,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:54,105 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:55:54,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54 WrapperNode [2019-10-22 08:55:54,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:54,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:54,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:55:54,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:55:54,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:54,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:55:54,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:55:54,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:55:54,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... [2019-10-22 08:55:54,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:55:54,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:55:54,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:55:54,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:55:54,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure p [2019-10-22 08:55:54,216 INFO L138 BoogieDeclarations]: Found implementation of procedure p [2019-10-22 08:55:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:55:54,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:55:54,452 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:55:54,458 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:55:54,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:54 BoogieIcfgContainer [2019-10-22 08:55:54,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:55:54,460 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 08:55:54,460 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 08:55:54,464 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 08:55:54,464 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:55:54,465 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 08:55:53" (1/3) ... [2019-10-22 08:55:54,465 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@119eb497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:55:54, skipping insertion in model container [2019-10-22 08:55:54,465 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:55:54,466 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:54" (2/3) ... [2019-10-22 08:55:54,466 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@119eb497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:55:54, skipping insertion in model container [2019-10-22 08:55:54,466 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:55:54,466 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:54" (3/3) ... [2019-10-22 08:55:54,468 INFO L371 chiAutomizerObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex4.c [2019-10-22 08:55:54,524 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 08:55:54,524 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 08:55:54,524 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 08:55:54,525 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:55:54,525 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:55:54,525 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 08:55:54,525 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:55:54,525 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 08:55:54,536 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-10-22 08:55:54,555 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:55:54,555 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:55:54,556 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:55:54,563 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 08:55:54,563 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:55:54,563 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 08:55:54,564 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-10-22 08:55:54,565 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:55:54,565 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:55:54,565 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:55:54,566 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 08:55:54,566 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:55:54,573 INFO L791 eck$LassoCheckResult]: Stem: 15#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~r~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~r~0 := main_#t~nondet4;havoc main_#t~nondet4; 7#L28true assume (main_~m~0 >= 0 && main_~n~0 >= 0) && main_~r~0 >= 0; 10#L29true call main_#t~ret5 := p(main_~m~0, main_~n~0, main_~r~0);< 11#pENTRYtrue [2019-10-22 08:55:54,573 INFO L793 eck$LassoCheckResult]: Loop: 11#pENTRYtrue ~m := #in~m;~n := #in~n;~r := #in~r; 12#L13true assume ~r > 0; 9#L14true call #t~ret0 := p(~m, ~r - 1, ~n);< 11#pENTRYtrue [2019-10-22 08:55:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash 44796, now seen corresponding path program 1 times [2019-10-22 08:55:54,593 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:54,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766821915] [2019-10-22 08:55:54,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:54,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:54,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:54,670 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash 29912, now seen corresponding path program 1 times [2019-10-22 08:55:54,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:54,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487868647] [2019-10-22 08:55:54,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:54,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:54,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:54,681 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:54,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1334517757, now seen corresponding path program 1 times [2019-10-22 08:55:54,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:54,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145891970] [2019-10-22 08:55:54,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:54,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:54,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:54,704 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:54,812 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:55:54,813 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:55:54,813 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:55:54,813 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:55:54,813 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:55:54,813 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:54,813 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:55:54,813 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:55:54,814 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration1_Loop [2019-10-22 08:55:54,814 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:55:54,814 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:55:54,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:54,949 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:55:54,951 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:54,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:54,960 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:54,968 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:54,968 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#res=0} Honda state: {p_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:54,978 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:54,978 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:54,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:54,983 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#t~ret0=0} Honda state: {p_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:54,993 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:54,993 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:54,998 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:54,998 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#t~ret1=0} Honda state: {p_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:55,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:55,007 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:55,015 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:55,015 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#in~m=0} Honda state: {p_#in~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:55,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:55,023 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:55,029 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:55,029 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_~n=0} Honda state: {p_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:55,038 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:55,039 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:55:55,043 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:55,043 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_~m=0} Honda state: {p_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:55,055 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:55,055 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:55,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:55:55,072 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:55:57,280 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:55:57,282 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:55:57,282 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:55:57,282 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:55:57,283 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:55:57,283 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:55:57,283 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:57,283 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:55:57,283 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:55:57,283 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration1_Loop [2019-10-22 08:55:57,283 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:55:57,283 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:55:57,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:57,355 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:55:57,360 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:55:57,361 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,363 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,363 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,363 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,363 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,364 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,365 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,365 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,368 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,369 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,369 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,370 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,370 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,370 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,370 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,371 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,371 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,372 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,372 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,373 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,373 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,373 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,373 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,373 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,374 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,374 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,378 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,379 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,379 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,379 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,380 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,380 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,380 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,380 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,380 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,381 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,382 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,390 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,391 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,391 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,391 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,391 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,392 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,392 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,393 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,393 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,394 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,394 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,394 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,394 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,395 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,395 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,395 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,396 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,397 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,397 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,397 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,397 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,397 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,398 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,403 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,403 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,419 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,419 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,420 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,420 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,420 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,420 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,421 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:57,421 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:57,421 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,422 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,422 INFO L489 LassoAnalysis]: Using template '2-nested'. [2019-10-22 08:55:57,423 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,423 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,423 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,424 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,424 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,424 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:55:57,424 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:55:57,425 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,426 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,426 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,427 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,427 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,427 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,427 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,427 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:55:57,428 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:55:57,428 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,429 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,429 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,430 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,430 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,431 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,431 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,431 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:55:57,431 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:55:57,431 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,432 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,433 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,433 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,433 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,434 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,434 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,434 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:55:57,435 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:55:57,435 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,436 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,436 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,437 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,437 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,437 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,437 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,437 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:55:57,438 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:55:57,438 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,440 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,440 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,441 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,441 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,441 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,441 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,441 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:55:57,442 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:55:57,442 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,443 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:57,443 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:57,444 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:57,444 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:57,444 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:57,444 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:57,444 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:55:57,445 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:55:57,445 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:57,462 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:55:57,483 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-10-22 08:55:57,490 INFO L444 ModelExtractionUtils]: 1 out of 7 variables were initially zero. Simplification set additionally 2 variables to zero. [2019-10-22 08:55:57,492 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:55:57,492 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:55:57,493 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:55:57,493 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function 2-nested ranking function: f0 = 1*p_#in~n + 1*p_#in~r f1 = 1*p_#in~r Supporting invariants [] [2019-10-22 08:55:57,496 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:55:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:57,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:55:57,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:57,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:55:57,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:57,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:55:57,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:55:57,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:55:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:57,696 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 [2019-10-22 08:55:57,697 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-10-22 08:55:57,874 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-10-22 08:55:57,876 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 [2019-10-22 08:55:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:55:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-10-22 08:55:57,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 3 letters. Loop has 3 letters. [2019-10-22 08:55:57,883 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:55:57,883 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 6 letters. Loop has 3 letters. [2019-10-22 08:55:57,883 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:55:57,883 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 3 letters. Loop has 6 letters. [2019-10-22 08:55:57,883 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:55:57,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-10-22 08:55:57,888 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:55:57,892 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 20 states and 23 transitions. [2019-10-22 08:55:57,893 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-10-22 08:55:57,894 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-10-22 08:55:57,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 23 transitions. [2019-10-22 08:55:57,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:55:57,895 INFO L688 BuchiCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-22 08:55:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 23 transitions. [2019-10-22 08:55:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2019-10-22 08:55:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-22 08:55:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2019-10-22 08:55:57,920 INFO L711 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-10-22 08:55:57,921 INFO L591 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-10-22 08:55:57,921 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 08:55:57,921 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 16 transitions. [2019-10-22 08:55:57,921 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:55:57,921 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:55:57,921 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:55:57,922 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2019-10-22 08:55:57,922 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 08:55:57,922 INFO L791 eck$LassoCheckResult]: Stem: 126#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~r~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~r~0 := main_#t~nondet4;havoc main_#t~nondet4; 127#L28 assume (main_~m~0 >= 0 && main_~n~0 >= 0) && main_~r~0 >= 0; 123#L29 call main_#t~ret5 := p(main_~m~0, main_~n~0, main_~r~0);< 129#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 131#L13 assume !(~r > 0); 125#L16 [2019-10-22 08:55:57,923 INFO L793 eck$LassoCheckResult]: Loop: 125#L16 assume ~n > 0; 120#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 122#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 132#L13 assume !(~r > 0); 125#L16 [2019-10-22 08:55:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:57,923 INFO L82 PathProgramCache]: Analyzing trace with hash 43048962, now seen corresponding path program 1 times [2019-10-22 08:55:57,923 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:57,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102632123] [2019-10-22 08:55:57,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:57,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:57,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:57,935 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1220476, now seen corresponding path program 1 times [2019-10-22 08:55:57,935 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:57,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307676925] [2019-10-22 08:55:57,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:57,936 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:57,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:57,942 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1891526915, now seen corresponding path program 1 times [2019-10-22 08:55:57,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:57,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390102158] [2019-10-22 08:55:57,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:57,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:57,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:57,958 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:58,033 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:55:58,033 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:55:58,033 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:55:58,033 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:55:58,033 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:55:58,034 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,034 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:55:58,034 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:55:58,034 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration2_Loop [2019-10-22 08:55:58,034 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:55:58,034 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:55:58,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,040 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,115 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:55:58,116 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:58,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:55:58,125 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:58,125 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#res=0} Honda state: {p_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:58,133 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:58,133 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,138 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:58,138 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#t~ret0=0} Honda state: {p_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:58,145 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:58,145 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,148 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:58,149 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#t~ret1=0} Honda state: {p_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,162 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:58,162 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,170 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:55:58,170 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:55:58,587 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:55:58,589 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:55:58,590 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:55:58,590 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:55:58,590 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:55:58,590 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:55:58,590 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,590 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:55:58,590 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:55:58,590 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration2_Loop [2019-10-22 08:55:58,590 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:55:58,590 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:55:58,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,693 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:55:58,693 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:55:58,693 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:58,694 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:58,694 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:58,694 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:58,694 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:58,695 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:58,695 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:58,695 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:58,696 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:58,697 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:58,697 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:58,697 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:58,697 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:58,698 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:58,698 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:58,698 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:58,698 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:58,703 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:55:58,704 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:55:58,704 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:55:58,704 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:55:58,704 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:55:58,705 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:55:58,705 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:55:58,705 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:55:58,705 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:55:58,713 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:55:58,720 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 08:55:58,723 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:55:58,724 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:55:58,724 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:55:58,724 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:55:58,724 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(p_~n) = 1*p_~n Supporting invariants [] [2019-10-22 08:55:58,725 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:55:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:58,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:55:58,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:58,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:55:58,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:58,807 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2019-10-22 08:55:58,807 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 16 transitions. cyclomatic complexity: 5 Second operand 5 states. [2019-10-22 08:55:58,824 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 16 transitions. cyclomatic complexity: 5. Second operand 5 states. Result 25 states and 30 transitions. Complement of second has 13 states. [2019-10-22 08:55:58,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-10-22 08:55:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 08:55:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2019-10-22 08:55:58,827 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 5 letters. Loop has 4 letters. [2019-10-22 08:55:58,828 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:55:58,828 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 9 letters. Loop has 4 letters. [2019-10-22 08:55:58,828 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:55:58,828 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 5 letters. Loop has 8 letters. [2019-10-22 08:55:58,830 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:55:58,834 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 30 transitions. [2019-10-22 08:55:58,835 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:55:58,836 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 20 states and 24 transitions. [2019-10-22 08:55:58,836 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-10-22 08:55:58,836 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-10-22 08:55:58,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 24 transitions. [2019-10-22 08:55:58,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:55:58,837 INFO L688 BuchiCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-22 08:55:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 24 transitions. [2019-10-22 08:55:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-10-22 08:55:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 08:55:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-10-22 08:55:58,842 INFO L711 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-10-22 08:55:58,842 INFO L591 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-10-22 08:55:58,842 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 08:55:58,842 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2019-10-22 08:55:58,843 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:55:58,843 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:55:58,843 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:55:58,843 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:58,843 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:55:58,844 INFO L791 eck$LassoCheckResult]: Stem: 227#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~r~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~r~0 := main_#t~nondet4;havoc main_#t~nondet4; 228#L28 assume (main_~m~0 >= 0 && main_~n~0 >= 0) && main_~r~0 >= 0; 222#L29 call main_#t~ret5 := p(main_~m~0, main_~n~0, main_~r~0);< 230#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 232#L13 assume !(~r > 0); 225#L16 assume ~n > 0; 221#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 224#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 234#L13 assume ~r > 0; 219#L14 [2019-10-22 08:55:58,844 INFO L793 eck$LassoCheckResult]: Loop: 219#L14 call #t~ret0 := p(~m, ~r - 1, ~n);< 220#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 235#L13 assume ~r > 0; 219#L14 [2019-10-22 08:55:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:58,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1891526918, now seen corresponding path program 1 times [2019-10-22 08:55:58,844 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:58,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494246101] [2019-10-22 08:55:58,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:58,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:58,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:58,859 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash 56702, now seen corresponding path program 2 times [2019-10-22 08:55:58,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:58,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714400303] [2019-10-22 08:55:58,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:58,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:58,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:58,867 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:58,867 INFO L82 PathProgramCache]: Analyzing trace with hash -507463707, now seen corresponding path program 1 times [2019-10-22 08:55:58,868 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:58,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347612629] [2019-10-22 08:55:58,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:58,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:58,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:58,890 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:58,974 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:55:58,974 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:55:58,974 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:55:58,974 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:55:58,974 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:55:58,974 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:58,974 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:55:58,974 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:55:58,974 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration3_Loop [2019-10-22 08:55:58,975 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:55:58,975 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:55:58,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:58,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:59,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:55:59,053 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:55:59,053 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:59,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:59,058 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:55:59,065 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:55:59,065 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#in~m=-6, p_~m=-6} Honda state: {p_#in~m=-6, p_~m=-6} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:59,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:55:59,072 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:55:59,086 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:55:59,087 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:11,112 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-10-22 08:56:11,115 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:11,115 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:11,115 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:11,115 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:11,115 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:11,116 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:11,116 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:11,116 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:11,116 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration3_Loop [2019-10-22 08:56:11,116 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:11,116 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:11,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,205 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:11,205 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:11,206 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:11,207 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:11,207 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:11,207 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:11,207 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:11,207 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:11,208 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:11,208 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:11,209 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:11,210 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:11,210 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:11,210 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:11,211 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:11,211 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:11,211 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:11,212 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:11,212 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:11,220 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:11,226 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:11,226 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:11,226 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:11,227 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:11,227 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:11,227 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:11,227 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:11,227 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:11,228 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:11,228 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:11,229 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:11,229 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:11,229 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:11,229 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:11,229 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:11,229 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:11,230 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:11,236 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:11,237 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:11,237 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:11,237 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:11,238 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:11,238 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:11,238 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:11,238 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:11,238 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:11,239 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:11,239 INFO L489 LassoAnalysis]: Using template '2-nested'. [2019-10-22 08:56:11,239 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:11,240 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:11,240 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:11,240 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:11,240 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:11,240 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:56:11,241 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:56:11,241 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:11,242 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:11,245 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:11,245 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:11,245 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:11,246 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:11,246 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:11,246 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:56:11,247 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:56:11,247 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:11,261 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:11,289 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2019-10-22 08:56:11,289 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 2 variables to zero. [2019-10-22 08:56:11,289 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:11,289 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:11,290 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:11,290 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function 2-nested ranking function: f0 = 1*p_~r + 1*p_~n f1 = 1*p_~n Supporting invariants [] [2019-10-22 08:56:11,290 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:11,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:56:11,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:11,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:11,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:11,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:11,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:11,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:11,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:11,404 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 [2019-10-22 08:56:11,404 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 7 Second operand 4 states. [2019-10-22 08:56:11,482 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 7. Second operand 4 states. Result 42 states and 50 transitions. Complement of second has 9 states. [2019-10-22 08:56:11,482 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 [2019-10-22 08:56:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-10-22 08:56:11,483 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 9 letters. Loop has 3 letters. [2019-10-22 08:56:11,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:11,483 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 12 letters. Loop has 3 letters. [2019-10-22 08:56:11,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:11,484 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 9 letters. Loop has 6 letters. [2019-10-22 08:56:11,484 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:11,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 42 states and 50 transitions. [2019-10-22 08:56:11,486 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:11,487 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 42 states to 36 states and 44 transitions. [2019-10-22 08:56:11,487 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2019-10-22 08:56:11,487 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-10-22 08:56:11,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 44 transitions. [2019-10-22 08:56:11,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:11,488 INFO L688 BuchiCegarLoop]: Abstraction has 36 states and 44 transitions. [2019-10-22 08:56:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states and 44 transitions. [2019-10-22 08:56:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-22 08:56:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:56:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-22 08:56:11,491 INFO L711 BuchiCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-22 08:56:11,491 INFO L591 BuchiCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-22 08:56:11,491 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 08:56:11,491 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 31 states and 38 transitions. [2019-10-22 08:56:11,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:11,493 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:11,493 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:11,493 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:11,493 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:56:11,493 INFO L791 eck$LassoCheckResult]: Stem: 355#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~r~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~r~0 := main_#t~nondet4;havoc main_#t~nondet4; 356#L28 assume (main_~m~0 >= 0 && main_~n~0 >= 0) && main_~r~0 >= 0; 357#L29 call main_#t~ret5 := p(main_~m~0, main_~n~0, main_~r~0);< 360#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 361#L13 assume ~r > 0; 351#L14 call #t~ret0 := p(~m, ~r - 1, ~n);< 358#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 375#L13 assume !(~r > 0); 353#L16 assume ~n > 0; 350#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 352#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 365#L13 assume ~r > 0; 349#L14 [2019-10-22 08:56:11,494 INFO L793 eck$LassoCheckResult]: Loop: 349#L14 call #t~ret0 := p(~m, ~r - 1, ~n);< 348#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 373#L13 assume ~r > 0; 349#L14 [2019-10-22 08:56:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1683587899, now seen corresponding path program 2 times [2019-10-22 08:56:11,494 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:11,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115348695] [2019-10-22 08:56:11,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:11,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:11,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:11,511 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:11,516 INFO L82 PathProgramCache]: Analyzing trace with hash 56702, now seen corresponding path program 3 times [2019-10-22 08:56:11,517 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:11,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638577255] [2019-10-22 08:56:11,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:11,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:11,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:11,521 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash -860956668, now seen corresponding path program 3 times [2019-10-22 08:56:11,522 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:11,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323990309] [2019-10-22 08:56:11,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:11,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:11,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:11,548 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:11,611 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:11,611 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:11,611 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:11,611 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:11,612 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:11,612 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:11,612 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:11,612 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:11,612 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration4_Loop [2019-10-22 08:56:11,612 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:11,612 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:11,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:11,682 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:11,682 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:11,690 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:11,690 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:11,704 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:11,704 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:23,728 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-10-22 08:56:23,731 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:23,731 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:23,731 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:23,731 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:23,732 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:23,732 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:23,732 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:23,732 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:23,732 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration4_Loop [2019-10-22 08:56:23,732 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:23,732 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:23,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:23,745 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:23,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:23,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:23,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:23,802 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:23,802 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:23,803 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:23,803 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:23,804 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:23,804 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:23,804 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:23,804 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:23,805 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:23,805 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:23,809 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:23,809 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:23,810 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:23,810 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:23,810 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:23,810 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:23,811 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:23,811 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:23,811 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:23,812 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:23,812 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:23,812 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:23,812 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:23,813 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:23,813 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:23,813 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:23,813 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:23,813 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:23,814 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:23,814 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:23,815 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:23,815 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:23,815 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:23,815 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:23,815 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:23,816 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:23,816 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:23,817 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:23,817 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:23,818 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:23,818 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:23,818 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:23,819 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:23,819 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:23,819 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:23,819 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:23,820 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:23,820 INFO L489 LassoAnalysis]: Using template '2-nested'. [2019-10-22 08:56:23,820 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:23,821 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:23,821 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:23,821 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:23,821 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:23,821 INFO L204 nArgumentSynthesizer]: 3 template conjuncts. [2019-10-22 08:56:23,822 INFO L400 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2019-10-22 08:56:23,822 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:23,829 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:23,838 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2019-10-22 08:56:23,838 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 2 variables to zero. [2019-10-22 08:56:23,838 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:23,839 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:23,839 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:23,839 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function 2-nested ranking function: f0 = 1*p_~n + 1*p_~r f1 = 1*p_~n Supporting invariants [] [2019-10-22 08:56:23,839 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:23,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:23,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:23,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:23,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:23,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:23,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:23,957 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 [2019-10-22 08:56:23,957 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 31 states and 38 transitions. cyclomatic complexity: 12 Second operand 4 states. [2019-10-22 08:56:24,041 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 31 states and 38 transitions. cyclomatic complexity: 12. Second operand 4 states. Result 48 states and 60 transitions. Complement of second has 9 states. [2019-10-22 08:56:24,043 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 [2019-10-22 08:56:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-10-22 08:56:24,044 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 12 letters. Loop has 3 letters. [2019-10-22 08:56:24,044 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:24,044 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:56:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:24,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:24,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:24,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:24,172 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2019-10-22 08:56:24,172 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 31 states and 38 transitions. cyclomatic complexity: 12 Second operand 4 states. [2019-10-22 08:56:24,271 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 31 states and 38 transitions. cyclomatic complexity: 12. Second operand 4 states. Result 48 states and 60 transitions. Complement of second has 9 states. [2019-10-22 08:56:24,275 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 [2019-10-22 08:56:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-10-22 08:56:24,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 12 letters. Loop has 3 letters. [2019-10-22 08:56:24,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:24,277 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:56:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:24,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:24,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:24,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:24,386 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-10-22 08:56:24,387 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 31 states and 38 transitions. cyclomatic complexity: 12 Second operand 4 states. [2019-10-22 08:56:24,491 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 31 states and 38 transitions. cyclomatic complexity: 12. Second operand 4 states. Result 53 states and 68 transitions. Complement of second has 8 states. [2019-10-22 08:56:24,493 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 [2019-10-22 08:56:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-10-22 08:56:24,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 12 letters. Loop has 3 letters. [2019-10-22 08:56:24,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:24,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 15 letters. Loop has 3 letters. [2019-10-22 08:56:24,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:24,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 12 letters. Loop has 6 letters. [2019-10-22 08:56:24,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:24,495 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 68 transitions. [2019-10-22 08:56:24,496 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2019-10-22 08:56:24,497 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 51 transitions. [2019-10-22 08:56:24,497 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-10-22 08:56:24,497 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2019-10-22 08:56:24,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 51 transitions. [2019-10-22 08:56:24,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:24,498 INFO L688 BuchiCegarLoop]: Abstraction has 41 states and 51 transitions. [2019-10-22 08:56:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 51 transitions. [2019-10-22 08:56:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2019-10-22 08:56:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 08:56:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-10-22 08:56:24,508 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-22 08:56:24,508 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-22 08:56:24,508 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-10-22 08:56:24,508 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2019-10-22 08:56:24,509 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2019-10-22 08:56:24,509 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:24,509 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:24,509 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:24,509 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1] [2019-10-22 08:56:24,510 INFO L791 eck$LassoCheckResult]: Stem: 724#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~r~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~r~0 := main_#t~nondet4;havoc main_#t~nondet4; 725#L28 assume (main_~m~0 >= 0 && main_~n~0 >= 0) && main_~r~0 >= 0; 723#L29 call main_#t~ret5 := p(main_~m~0, main_~n~0, main_~r~0);< 732#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 733#L13 assume !(~r > 0); 726#L16 assume ~n > 0; 720#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 721#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 734#L13 assume ~r > 0; 718#L14 [2019-10-22 08:56:24,510 INFO L793 eck$LassoCheckResult]: Loop: 718#L14 call #t~ret0 := p(~m, ~r - 1, ~n);< 729#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 730#L13 assume !(~r > 0); 735#L16 assume ~n > 0; 716#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 719#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 736#L13 assume ~r > 0; 718#L14 [2019-10-22 08:56:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1891526918, now seen corresponding path program 2 times [2019-10-22 08:56:24,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:24,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578310401] [2019-10-22 08:56:24,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:24,546 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash 828947705, now seen corresponding path program 1 times [2019-10-22 08:56:24,547 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:24,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778775320] [2019-10-22 08:56:24,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:24,568 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 559352800, now seen corresponding path program 4 times [2019-10-22 08:56:24,569 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:24,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073869579] [2019-10-22 08:56:24,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:56:24,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073869579] [2019-10-22 08:56:24,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277905514] [2019-10-22 08:56:24,647 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:24,685 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:56:24,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:24,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:24,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:56:24,695 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:24,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-10-22 08:56:24,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571162779] [2019-10-22 08:56:24,881 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:24,881 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:24,881 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:24,881 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:24,881 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:24,881 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:24,881 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:24,881 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:24,881 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration5_Loop [2019-10-22 08:56:24,881 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:24,881 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:24,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:24,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:24,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:24,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:24,962 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:24,962 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:24,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:24,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:24,969 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:24,969 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#res=0} Honda state: {p_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:24,973 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:24,973 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:24,975 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:24,976 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#t~ret1=0} Honda state: {p_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:24,981 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:24,981 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:24,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:24,983 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#t~ret0=0} Honda state: {p_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:24,987 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:24,988 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:24,998 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:24,999 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:30,614 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:30,616 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:30,617 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:30,617 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:30,617 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:30,617 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:30,617 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:30,617 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:30,617 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:30,617 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration5_Loop [2019-10-22 08:56:30,617 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:30,617 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:30,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:30,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:30,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:30,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:30,707 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:30,708 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:30,708 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:30,708 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:30,709 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:30,709 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:30,709 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:30,709 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:30,709 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:30,709 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:30,710 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:30,712 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:30,713 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:30,713 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:30,713 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:30,713 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:30,713 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:30,714 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:30,714 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:30,714 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:30,715 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:30,715 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:30,715 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:30,715 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:30,715 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:30,716 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:30,716 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:30,716 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:30,716 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:30,717 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:30,717 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:30,717 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:30,717 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:30,717 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:30,718 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:30,721 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:30,722 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:30,738 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:30,740 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 08:56:30,740 INFO L444 ModelExtractionUtils]: 5 out of 8 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:56:30,741 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:30,741 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:30,741 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:30,741 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(p_~m) = 1*p_~m Supporting invariants [] [2019-10-22 08:56:30,741 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:56:30,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 08:56:30,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:30,851 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2019-10-22 08:56:30,852 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 9 Second operand 7 states. [2019-10-22 08:56:30,938 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 9. Second operand 7 states. Result 104 states and 131 transitions. Complement of second has 26 states. [2019-10-22 08:56:30,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2019-10-22 08:56:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 08:56:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 20 transitions. [2019-10-22 08:56:30,940 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 9 letters. Loop has 7 letters. [2019-10-22 08:56:30,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:30,940 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 16 letters. Loop has 7 letters. [2019-10-22 08:56:30,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:30,940 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 9 letters. Loop has 14 letters. [2019-10-22 08:56:30,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:30,941 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 104 states and 131 transitions. [2019-10-22 08:56:30,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2019-10-22 08:56:30,943 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 104 states to 104 states and 131 transitions. [2019-10-22 08:56:30,943 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2019-10-22 08:56:30,944 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 32 [2019-10-22 08:56:30,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 131 transitions. [2019-10-22 08:56:30,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:30,944 INFO L688 BuchiCegarLoop]: Abstraction has 104 states and 131 transitions. [2019-10-22 08:56:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 131 transitions. [2019-10-22 08:56:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2019-10-22 08:56:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-22 08:56:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2019-10-22 08:56:30,949 INFO L711 BuchiCegarLoop]: Abstraction has 59 states and 79 transitions. [2019-10-22 08:56:30,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:30,952 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 6 states. [2019-10-22 08:56:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:31,009 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2019-10-22 08:56:31,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:56:31,010 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 79 states and 95 transitions. [2019-10-22 08:56:31,011 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-10-22 08:56:31,012 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 79 states to 37 states and 43 transitions. [2019-10-22 08:56:31,012 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2019-10-22 08:56:31,012 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2019-10-22 08:56:31,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 43 transitions. [2019-10-22 08:56:31,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:31,013 INFO L688 BuchiCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-10-22 08:56:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 43 transitions. [2019-10-22 08:56:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2019-10-22 08:56:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 08:56:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-22 08:56:31,015 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-22 08:56:31,015 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-22 08:56:31,015 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-10-22 08:56:31,015 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 28 transitions. [2019-10-22 08:56:31,016 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 08:56:31,016 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:31,016 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:31,016 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:31,016 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 08:56:31,017 INFO L791 eck$LassoCheckResult]: Stem: 1150#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~r~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~r~0 := main_#t~nondet4;havoc main_#t~nondet4; 1151#L28 assume (main_~m~0 >= 0 && main_~n~0 >= 0) && main_~r~0 >= 0; 1152#L29 call main_#t~ret5 := p(main_~m~0, main_~n~0, main_~r~0);< 1157#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 1163#L13 assume !(~r > 0); 1162#L16 assume ~n > 0; 1153#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 1161#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 1160#L13 assume ~r > 0; 1144#L14 call #t~ret0 := p(~m, ~r - 1, ~n);< 1142#pENTRY [2019-10-22 08:56:31,017 INFO L793 eck$LassoCheckResult]: Loop: 1142#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 1154#L13 assume !(~r > 0); 1148#L16 assume ~n > 0; 1141#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 1142#pENTRY [2019-10-22 08:56:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1492207714, now seen corresponding path program 5 times [2019-10-22 08:56:31,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707107942] [2019-10-22 08:56:31,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,027 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash 929596, now seen corresponding path program 2 times [2019-10-22 08:56:31,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857293157] [2019-10-22 08:56:31,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,032 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1953652509, now seen corresponding path program 6 times [2019-10-22 08:56:31,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319443824] [2019-10-22 08:56:31,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,042 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:31,083 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:31,083 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:31,083 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:31,083 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:31,083 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:31,083 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,084 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:31,084 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:31,084 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration6_Loop [2019-10-22 08:56:31,084 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:31,084 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:31,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,103 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,138 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:31,139 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,143 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,144 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,146 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:31,146 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#res=0} Honda state: {p_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,153 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:31,153 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_~r=0} Honda state: {p_~r=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,157 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,158 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,164 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:31,164 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,168 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:31,170 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:31,170 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:31,170 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:31,170 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:31,170 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:31,170 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,170 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:31,170 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:31,170 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration6_Loop [2019-10-22 08:56:31,170 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:31,170 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:31,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,256 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:31,256 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:31,256 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,257 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,257 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,257 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,257 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,258 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,258 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,258 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,259 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:31,259 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,259 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,260 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,260 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,260 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,260 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,260 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,260 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,261 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:31,261 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,262 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,262 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,262 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,262 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,262 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,263 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,263 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,264 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:31,264 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,265 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,265 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,265 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,265 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,265 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,265 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,265 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,267 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:31,269 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 08:56:31,269 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:56:31,269 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:31,269 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:31,269 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:31,270 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(p_#in~n) = 1*p_#in~n Supporting invariants [] [2019-10-22 08:56:31,270 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,333 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 [2019-10-22 08:56:31,334 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 28 transitions. cyclomatic complexity: 7 Second operand 4 states. [2019-10-22 08:56:31,371 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 28 transitions. cyclomatic complexity: 7. Second operand 4 states. Result 62 states and 70 transitions. Complement of second has 13 states. [2019-10-22 08:56:31,374 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 [2019-10-22 08:56:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-10-22 08:56:31,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 10 letters. Loop has 4 letters. [2019-10-22 08:56:31,375 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:31,375 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 14 letters. Loop has 4 letters. [2019-10-22 08:56:31,375 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:31,375 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 10 letters. Loop has 8 letters. [2019-10-22 08:56:31,375 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:31,375 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 70 transitions. [2019-10-22 08:56:31,376 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 08:56:31,377 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 39 states and 46 transitions. [2019-10-22 08:56:31,377 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-10-22 08:56:31,377 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2019-10-22 08:56:31,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 46 transitions. [2019-10-22 08:56:31,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:31,377 INFO L688 BuchiCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-10-22 08:56:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states and 46 transitions. [2019-10-22 08:56:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-22 08:56:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 08:56:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-22 08:56:31,379 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-22 08:56:31,379 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-22 08:56:31,379 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-10-22 08:56:31,379 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 27 transitions. [2019-10-22 08:56:31,380 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 08:56:31,380 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:31,380 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:31,381 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:31,381 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 08:56:31,381 INFO L791 eck$LassoCheckResult]: Stem: 1308#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~r~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~r~0 := main_#t~nondet4;havoc main_#t~nondet4; 1309#L28 assume (main_~m~0 >= 0 && main_~n~0 >= 0) && main_~r~0 >= 0; 1312#L29 call main_#t~ret5 := p(main_~m~0, main_~n~0, main_~r~0);< 1319#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 1320#L13 assume !(~r > 0); 1321#L16 assume ~n > 0; 1314#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 1323#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 1322#L13 assume ~r > 0; 1313#L14 call #t~ret0 := p(~m, ~r - 1, ~n);< 1307#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 1318#L13 assume ~r > 0; 1303#L14 call #t~ret0 := p(~m, ~r - 1, ~n);< 1304#pENTRY [2019-10-22 08:56:31,381 INFO L793 eck$LassoCheckResult]: Loop: 1304#pENTRY ~m := #in~m;~n := #in~n;~r := #in~r; 1324#L13 assume !(~r > 0); 1310#L16 assume ~n > 0; 1302#L17 call #t~ret1 := p(~r, ~n - 1, ~m);< 1304#pENTRY [2019-10-22 08:56:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1448494295, now seen corresponding path program 7 times [2019-10-22 08:56:31,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920159841] [2019-10-22 08:56:31,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,393 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash 929596, now seen corresponding path program 3 times [2019-10-22 08:56:31,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384118708] [2019-10-22 08:56:31,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,399 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash 90839314, now seen corresponding path program 8 times [2019-10-22 08:56:31,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431659091] [2019-10-22 08:56:31,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:31,414 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:31,483 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:31,483 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:31,483 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:31,483 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:31,483 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:31,483 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,483 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:31,483 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:31,484 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration7_Loop [2019-10-22 08:56:31,484 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:31,484 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:31,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,491 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,574 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:31,574 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,581 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,581 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,584 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:31,584 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#res=0} Honda state: {p_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,589 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,589 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,593 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:31,593 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_#in~m=0, p_#in~r=0} Honda state: {p_#in~m=0, p_#in~r=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,599 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,600 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,602 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:31,602 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_~m=0} Honda state: {p_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,607 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,607 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,611 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:31,611 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {p_~r=0} Honda state: {p_~r=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,620 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:31,620 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7bf88666-a50d-4d3a-b2f3-62f6ec00240f/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,633 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:31,633 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:31,674 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:31,675 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:31,676 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:31,676 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:31,676 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:31,676 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:31,676 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:31,676 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:31,676 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:31,676 INFO L131 ssoRankerPreferences]: Filename of dumped script: LeeJonesBen-Amram-POPL2001-Ex4.c_Iteration7_Loop [2019-10-22 08:56:31,676 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:31,676 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:31,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:31,745 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:31,745 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:31,745 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,746 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,746 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,746 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,747 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,747 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,747 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,747 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,747 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:31,747 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,748 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,748 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,748 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,748 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,748 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,748 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,748 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,749 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:31,749 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,749 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,749 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,749 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,750 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,750 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,750 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,750 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,750 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:31,759 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:56:31,759 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:31,759 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:31,759 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:31,759 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:31,760 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:31,760 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:31,760 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:31,761 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:31,763 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 08:56:31,763 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:56:31,763 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:31,763 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:31,764 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:31,764 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(p_#in~n) = 1*p_#in~n Supporting invariants [] [2019-10-22 08:56:31,764 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,824 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 [2019-10-22 08:56:31,824 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-10-22 08:56:31,859 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 48 states and 55 transitions. Complement of second has 11 states. [2019-10-22 08:56:31,861 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 [2019-10-22 08:56:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-10-22 08:56:31,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 13 letters. Loop has 4 letters. [2019-10-22 08:56:31,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:31,862 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:56:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,913 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2019-10-22 08:56:31,913 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-10-22 08:56:31,950 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 48 states and 55 transitions. Complement of second has 11 states. [2019-10-22 08:56:31,950 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 [2019-10-22 08:56:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-10-22 08:56:31,951 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 13 letters. Loop has 4 letters. [2019-10-22 08:56:31,951 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:31,951 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:56:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:32,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:32,017 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-10-22 08:56:32,017 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-10-22 08:56:32,047 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 48 states and 53 transitions. Complement of second has 12 states. [2019-10-22 08:56:32,050 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 [2019-10-22 08:56:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-10-22 08:56:32,051 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 13 letters. Loop has 4 letters. [2019-10-22 08:56:32,051 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:32,051 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 17 letters. Loop has 4 letters. [2019-10-22 08:56:32,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:32,052 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 13 letters. Loop has 8 letters. [2019-10-22 08:56:32,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:32,052 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 53 transitions. [2019-10-22 08:56:32,053 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:56:32,053 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 0 states and 0 transitions. [2019-10-22 08:56:32,053 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-10-22 08:56:32,054 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-10-22 08:56:32,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-10-22 08:56:32,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:56:32,054 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:32,054 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:32,054 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:32,054 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-10-22 08:56:32,055 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:56:32,055 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:56:32,055 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-10-22 08:56:32,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 08:56:32 BoogieIcfgContainer [2019-10-22 08:56:32,060 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 08:56:32,060 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:32,060 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:32,061 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:32,061 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:54" (3/4) ... [2019-10-22 08:56:32,064 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:56:32,064 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:32,066 INFO L168 Benchmark]: Toolchain (without parser) took 38244.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -133.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:32,067 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:32,067 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -154.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:32,068 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:32,068 INFO L168 Benchmark]: Boogie Preprocessor took 15.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:32,068 INFO L168 Benchmark]: RCFGBuilder took 309.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:32,069 INFO L168 Benchmark]: BuchiAutomizer took 37600.06 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 335.0 kB). Peak memory consumption was 49.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:32,069 INFO L168 Benchmark]: Witness Printer took 4.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:32,072 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 283.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -154.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 309.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 37600.06 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 335.0 kB). Peak memory consumption was 49.6 MB. Max. memory is 11.5 GB. * Witness Printer took 4.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (1 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has 2-nested ranking function (if \old(n) + \old(r) > 0 then 1 else 0), (if \old(n) + \old(r) > 0 then \old(n) + \old(r) else \old(r)) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 5 locations. One deterministic module has 2-nested ranking function (if r + n > 0 then 1 else 0), (if r + n > 0 then r + n else n) and consists of 4 locations. One deterministic module has affine ranking function m and consists of 7 locations. One deterministic module has affine ranking function \old(n) and consists of 4 locations. One nondeterministic module has 2-nested ranking function (if n + r > 0 then 1 else 0), (if n + r > 0 then n + r else n) and consists of 4 locations. One nondeterministic module has affine ranking function \old(n) and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 37.5s and 8 iterations. TraceHistogramMax:3. Analysis of lassos took 35.4s. Construction of modules took 0.2s. Büchi inclusion checks took 1.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 104 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 31 states and ocurred in iteration 3. Nontrivial modules had stage [5, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 146 SDtfs, 159 SDslu, 59 SDs, 0 SdLazy, 192 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT6 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital24 mio100 ax100 hnf99 lsp73 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf89 smp100 dnf100 smp100 tf107 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 3ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 3 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 19 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 2 LassoNonterminationAnalysisTime: 32.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...