./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loop-invgen/down.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loop-invgen/down.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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 32bit --witnessprinter.graph.data.programhash 2dbb8f693d4595fbb0db5e58fd784bc92a5adb54 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:23:26,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:23:26,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:23:26,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:23:26,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:23:26,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:23:26,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:23:26,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:23:26,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:23:26,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:23:26,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:23:26,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:23:26,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:23:26,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:23:26,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:23:26,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:23:26,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:23:26,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:23:26,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:23:26,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:23:26,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:23:26,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:23:26,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:23:26,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:23:26,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:23:26,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:23:26,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:23:26,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:23:26,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:23:26,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:23:26,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:23:26,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:23:26,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:23:26,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:23:26,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:23:26,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:23:26,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:23:26,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:23:26,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:23:26,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:23:26,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:23:26,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 23:23:26,319 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:23:26,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:23:26,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:23:26,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:23:26,323 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:23:26,323 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:23:26,323 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:23:26,323 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:23:26,323 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:23:26,324 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:23:26,325 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:23:26,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:23:26,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:23:26,326 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:23:26,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:23:26,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:23:26,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:23:26,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:23:26,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:23:26,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:23:26,328 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:23:26,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:23:26,328 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:23:26,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:23:26,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:23:26,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:23:26,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:23:26,329 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:23:26,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:23:26,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:23:26,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:23:26,332 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:23:26,333 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:23:26,333 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dbb8f693d4595fbb0db5e58fd784bc92a5adb54 [2020-11-29 23:23:26,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:23:26,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:23:26,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:23:26,665 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:23:26,666 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:23:26,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/../../sv-benchmarks/c/loop-invgen/down.i [2020-11-29 23:23:26,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/data/dd08c971b/8966761dde294bc69662503da0cf04a1/FLAG1d705682a [2020-11-29 23:23:27,297 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:23:27,298 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/sv-benchmarks/c/loop-invgen/down.i [2020-11-29 23:23:27,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/data/dd08c971b/8966761dde294bc69662503da0cf04a1/FLAG1d705682a [2020-11-29 23:23:27,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/data/dd08c971b/8966761dde294bc69662503da0cf04a1 [2020-11-29 23:23:27,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:23:27,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:23:27,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:23:27,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:23:27,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:23:27,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:27,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44919a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27, skipping insertion in model container [2020-11-29 23:23:27,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:27,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:23:27,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:23:27,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:23:27,951 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:23:27,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:23:27,982 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:23:27,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27 WrapperNode [2020-11-29 23:23:27,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:23:27,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:23:27,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:23:27,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:23:27,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:23:28,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:23:28,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:23:28,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:23:28,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... [2020-11-29 23:23:28,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:23:28,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:23:28,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:23:28,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:23:28,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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 [2020-11-29 23:23:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:23:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:23:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:23:28,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:23:28,311 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:23:28,311 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 23:23:28,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:23:28 BoogieIcfgContainer [2020-11-29 23:23:28,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:23:28,314 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:23:28,314 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:23:28,333 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:23:28,333 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:23:28,334 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:23:27" (1/3) ... [2020-11-29 23:23:28,339 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@14a69b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:23:28, skipping insertion in model container [2020-11-29 23:23:28,339 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:23:28,339 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:23:27" (2/3) ... [2020-11-29 23:23:28,340 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@14a69b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:23:28, skipping insertion in model container [2020-11-29 23:23:28,340 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:23:28,340 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:23:28" (3/3) ... [2020-11-29 23:23:28,341 INFO L373 chiAutomizerObserver]: Analyzing ICFG down.i [2020-11-29 23:23:28,402 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:23:28,402 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:23:28,402 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:23:28,402 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:23:28,403 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:23:28,403 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:23:28,403 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:23:28,403 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:23:28,417 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 23:23:28,451 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-29 23:23:28,452 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:23:28,452 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:23:28,458 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:23:28,458 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 23:23:28,459 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:23:28,459 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 23:23:28,462 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-29 23:23:28,462 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:23:28,462 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:23:28,462 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:23:28,463 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 23:23:28,469 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 9#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~post4, main_#t~post5, main_#t~post6, main_#t~post7, main_~n~0, main_~k~0, main_~i~0, main_~j~0;havoc main_~n~0;main_~k~0 := 0;main_~i~0 := 0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 5#L29-2true [2020-11-29 23:23:28,469 INFO L796 eck$LassoCheckResult]: Loop: 5#L29-2true assume !!(main_~i~0 < main_~n~0);main_#t~post4 := main_~i~0;main_~i~0 := 1 + main_#t~post4;havoc main_#t~post4;main_#t~post5 := main_~k~0;main_~k~0 := 1 + main_#t~post5;havoc main_#t~post5; 5#L29-2true [2020-11-29 23:23:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:28,475 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-29 23:23:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:23:28,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232522512] [2020-11-29 23:23:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:23:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:28,602 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:28,630 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:28,669 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:23:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:28,678 INFO L82 PathProgramCache]: Analyzing trace with hash 42, now seen corresponding path program 1 times [2020-11-29 23:23:28,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:23:28,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368264918] [2020-11-29 23:23:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:23:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:28,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:28,703 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:28,709 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:23:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2020-11-29 23:23:28,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:23:28,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699659823] [2020-11-29 23:23:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:23:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:28,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:28,767 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:28,774 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:23:28,849 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:23:28,849 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:23:28,850 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:23:28,850 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:23:28,850 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:23:28,850 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:28,851 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:23:28,851 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:23:28,851 INFO L133 ssoRankerPreferences]: Filename of dumped script: down.i_Iteration1_Loop [2020-11-29 23:23:28,851 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:23:28,851 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:23:28,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:28,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:28,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:28,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:28,979 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:23:28,982 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:28,992 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:23:28,993 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 [2020-11-29 23:23:29,002 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:23:29,002 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:29,044 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:23:29,044 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:29,090 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:23:29,090 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 [2020-11-29 23:23:29,285 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:23:29,288 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:23:29,288 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:23:29,288 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:23:29,288 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:23:29,288 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:23:29,288 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:29,288 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:23:29,289 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:23:29,289 INFO L133 ssoRankerPreferences]: Filename of dumped script: down.i_Iteration1_Loop [2020-11-29 23:23:29,289 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:23:29,289 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:23:29,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,369 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:23:29,374 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:29,382 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 [2020-11-29 23:23:29,385 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:23:29,385 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:23:29,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:23:29,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:23:29,386 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:23:29,390 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:23:29,390 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:29,393 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:29,469 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 [2020-11-29 23:23:29,471 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:23:29,471 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:23:29,471 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:23:29,471 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:23:29,471 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:23:29,473 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:23:29,473 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:23:29,499 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:23:29,521 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-29 23:23:29,521 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:29,529 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:23:29,529 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:23:29,529 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:23:29,530 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:29,567 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:23:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:23:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:23:29,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:23:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:23:29,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:23:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:23:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:23:29,645 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 23:23:29,646 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 2 states. [2020-11-29 23:23:29,686 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 2 states. Result 35 states and 47 transitions. Complement of second has 5 states. [2020-11-29 23:23:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:23:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 23:23:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2020-11-29 23:23:29,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 2 letters. Loop has 1 letters. [2020-11-29 23:23:29,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:23:29,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-29 23:23:29,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:23:29,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-29 23:23:29,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:23:29,692 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 47 transitions. [2020-11-29 23:23:29,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 23:23:29,699 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 8 states and 10 transitions. [2020-11-29 23:23:29,700 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-29 23:23:29,701 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 23:23:29,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 10 transitions. [2020-11-29 23:23:29,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:23:29,702 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2020-11-29 23:23:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 10 transitions. [2020-11-29 23:23:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-29 23:23:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 23:23:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2020-11-29 23:23:29,729 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2020-11-29 23:23:29,729 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2020-11-29 23:23:29,729 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:23:29,729 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 10 transitions. [2020-11-29 23:23:29,732 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 23:23:29,732 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:23:29,732 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:23:29,733 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 23:23:29,733 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:23:29,733 INFO L794 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 81#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~post4, main_#t~post5, main_#t~post6, main_#t~post7, main_~n~0, main_~k~0, main_~i~0, main_~j~0;havoc main_~n~0;main_~k~0 := 0;main_~i~0 := 0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 82#L29-2 assume !(main_~i~0 < main_~n~0); 83#L29-3 main_~j~0 := main_~n~0; 84#L34-2 [2020-11-29 23:23:29,734 INFO L796 eck$LassoCheckResult]: Loop: 84#L34-2 assume !!(main_~j~0 > 0);__VERIFIER_assert_#in~cond := (if main_~k~0 > 0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 87#L18 assume !(0 == __VERIFIER_assert_~cond); 85#L18-2 main_#t~post6 := main_~j~0;main_~j~0 := main_#t~post6 - 1;havoc main_#t~post6;main_#t~post7 := main_~k~0;main_~k~0 := main_#t~post7 - 1;havoc main_#t~post7; 84#L34-2 [2020-11-29 23:23:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash 925737, now seen corresponding path program 1 times [2020-11-29 23:23:29,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:23:29,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078168709] [2020-11-29 23:23:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:23:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:29,767 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:29,780 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:29,787 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:23:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:29,788 INFO L82 PathProgramCache]: Analyzing trace with hash 54074, now seen corresponding path program 1 times [2020-11-29 23:23:29,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:23:29,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999213809] [2020-11-29 23:23:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:23:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:29,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:23:29,816 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:23:29,818 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:23:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1808851474, now seen corresponding path program 1 times [2020-11-29 23:23:29,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:23:29,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537260677] [2020-11-29 23:23:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:23:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:23:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:23:29,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537260677] [2020-11-29 23:23:29,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:23:29,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:23:29,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868199501] [2020-11-29 23:23:29,965 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:23:29,965 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:23:29,966 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:23:29,966 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:23:29,966 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:23:29,966 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:29,966 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:23:29,966 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:23:29,966 INFO L133 ssoRankerPreferences]: Filename of dumped script: down.i_Iteration2_Loop [2020-11-29 23:23:29,967 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:23:29,967 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:23:29,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:29,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:30,073 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:23:30,073 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:30,112 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:23:30,112 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 [2020-11-29 23:23:30,116 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:23:30,116 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post6=0} Honda state: {ULTIMATE.start_main_#t~post6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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 [2020-11-29 23:23:30,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:23:30,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:23:30,156 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:23:30,156 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Honda state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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 [2020-11-29 23:23:30,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:23:30,179 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:23:30,188 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:23:30,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post7=0} Honda state: {ULTIMATE.start_main_#t~post7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:30,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:23:30,232 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:30,277 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:23:30,277 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 [2020-11-29 23:23:30,317 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:23:30,318 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:23:30,319 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:23:30,319 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:23:30,319 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:23:30,319 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:23:30,319 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:30,319 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:23:30,320 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:23:30,320 INFO L133 ssoRankerPreferences]: Filename of dumped script: down.i_Iteration2_Loop [2020-11-29 23:23:30,320 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:23:30,320 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:23:30,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:30,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:30,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:30,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:30,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:23:30,484 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:23:30,485 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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) [2020-11-29 23:23:30,490 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 [2020-11-29 23:23:30,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:23:30,493 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:23:30,493 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:23:30,493 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:23:30,493 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:23:30,495 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:23:30,495 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:30,497 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/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 [2020-11-29 23:23:30,535 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 [2020-11-29 23:23:30,537 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:23:30,537 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:23:30,537 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:23:30,537 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:23:30,538 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:23:30,540 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:23:30,540 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:23:30,543 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:30,578 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 [2020-11-29 23:23:30,580 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:23:30,581 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:23:30,581 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:23:30,581 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:23:30,581 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:23:30,582 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:23:30,582 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:23:30,584 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:30,610 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 [2020-11-29 23:23:30,612 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:23:30,612 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:23:30,612 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:23:30,612 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:23:30,612 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:23:30,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:23:30,625 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:23:30,639 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:23:30,683 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 23:23:30,684 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a09b0510-7598-4f25-bd42-437212d534a7/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:23:30,697 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:23:30,697 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:23:30,698 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:23:30,698 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0) = 1*ULTIMATE.start_main_~k~0 Supporting invariants [] [2020-11-29 23:23:30,719 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:23:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:23:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:23:30,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 23:23:30,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:23:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:23:30,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:23:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:23:30,813 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:23:30,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:23:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:23:30,837 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 [2020-11-29 23:23:30,837 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 10 transitions. cyclomatic complexity: 4 Second operand 4 states. [2020-11-29 23:23:30,905 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 10 transitions. cyclomatic complexity: 4. Second operand 4 states. Result 11 states and 14 transitions. Complement of second has 6 states. [2020-11-29 23:23:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:23:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:23:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-11-29 23:23:30,907 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 23:23:30,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:23:30,908 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-29 23:23:30,909 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:23:30,909 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 6 letters. [2020-11-29 23:23:30,909 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:23:30,909 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 14 transitions. [2020-11-29 23:23:30,910 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:23:30,910 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 0 states and 0 transitions. [2020-11-29 23:23:30,910 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 23:23:30,910 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 23:23:30,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 23:23:30,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:23:30,910 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:23:30,910 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:23:30,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:23:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:23:30,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:23:30,915 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 5 states. [2020-11-29 23:23:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:23:30,917 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-29 23:23:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:23:30,918 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-29 23:23:30,918 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:23:30,919 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 23:23:30,919 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 23:23:30,919 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 23:23:30,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 23:23:30,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:23:30,920 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:23:30,920 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:23:30,920 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:23:30,920 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:23:30,920 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:23:30,920 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:23:30,920 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 23:23:30,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:23:30 BoogieIcfgContainer [2020-11-29 23:23:30,928 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:23:30,931 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:23:30,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:23:30,931 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:23:30,932 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:23:28" (3/4) ... [2020-11-29 23:23:30,935 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 23:23:30,935 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:23:30,938 INFO L168 Benchmark]: Toolchain (without parser) took 3247.66 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 81.5 MB in the beginning and 81.7 MB in the end (delta: -199.1 kB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:23:30,939 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 73.4 MB. Free memory was 31.1 MB in the beginning and 31.1 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:23:30,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.77 ms. Allocated memory is still 115.3 MB. Free memory was 81.5 MB in the beginning and 91.2 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:23:30,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.78 ms. Allocated memory is still 115.3 MB. Free memory was 91.2 MB in the beginning and 89.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:23:30,947 INFO L168 Benchmark]: Boogie Preprocessor took 20.98 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 88.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:23:30,948 INFO L168 Benchmark]: RCFGBuilder took 272.43 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 77.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:23:30,948 INFO L168 Benchmark]: BuchiAutomizer took 2614.62 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 77.3 MB in the beginning and 81.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:23:30,949 INFO L168 Benchmark]: Witness Printer took 4.21 ms. Allocated memory is still 138.4 MB. Free memory is still 81.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:23:30,959 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 73.4 MB. Free memory was 31.1 MB in the beginning and 31.1 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.77 ms. Allocated memory is still 115.3 MB. Free memory was 81.5 MB in the beginning and 91.2 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.78 ms. Allocated memory is still 115.3 MB. Free memory was 91.2 MB in the beginning and 89.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.98 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 88.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 272.43 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 77.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2614.62 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 77.3 MB in the beginning and 81.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.21 ms. Allocated memory is still 138.4 MB. Free memory is still 81.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function n + -1 * i and consists of 4 locations. One deterministic module has affine ranking function k and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.5s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 2.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 8 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 16 SDtfs, 19 SDslu, 9 SDs, 0 SdLazy, 11 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf100 lsp54 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...